/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-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:54:52,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:54:52,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:54:52,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:54:52,979 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 19:54:53,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:54:53,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:54:53,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:54:53,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:54:53,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:54:53,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:54:53,012 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:54:53,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:54:53,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:54:53,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:54:53,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:54:53,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:54:53,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:54:53,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:54:53,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:54:53,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:54:53,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:54:53,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:54:53,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:54:53,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:54:53,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:54:53,015 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:54:53,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:54:53,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:54:53,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:54:53,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:54:53,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:54:53,253 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:54:53,254 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:54:53,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-06-12 19:54:53,254 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-06-12 19:54:53,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:54:53,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:54:53,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:54:53,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:54:53,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:54:53,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:54:53,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:54:53,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:54:53,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:54:53,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/1) ... [2021-06-12 19:54:53,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:54:53,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:54:53,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:54:53,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:54:53,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (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 19:54:53,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:54:53,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:54:53,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:54:53,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:54:53,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:54:53,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:54:53,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:54:53,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:54:53,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:54:53,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 19:54:53,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 19:54:53,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 19:54:53,369 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 19:54:53,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:54:53,638 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 19:54:53,639 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:54:53 BoogieIcfgContainer [2021-06-12 19:54:53,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:54:53,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:54:53,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:54:53,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:54:53,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:54:53" (1/2) ... [2021-06-12 19:54:53,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e20dac and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:54:53, skipping insertion in model container [2021-06-12 19:54:53,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:54:53" (2/2) ... [2021-06-12 19:54:53,644 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-06-12 19:54:53,647 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:54:53,647 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:54:53,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:54:53,648 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:54:53,685 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 19:54:53,703 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 19:54:53,727 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:54:53,728 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:54:53,728 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:54:53,728 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:54:53,729 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:54:53,729 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:54:53,729 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:54:53,729 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:54:53,738 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-12 19:54:53,758 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 19:54:53,759 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 19:54:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:53,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:53,769 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 19:54:53,769 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 480470199, now seen corresponding path program 1 times [2021-06-12 19:54:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:53,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105049806] [2021-06-12 19:54:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:53,952 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 19:54:53,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:53,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105049806] [2021-06-12 19:54:53,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105049806] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:53,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:53,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:54:53,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310571516] [2021-06-12 19:54:53,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:54:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:54:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:54:53,965 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 19:54:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:53,993 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2021-06-12 19:54:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:54:53,997 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 19:54:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,008 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:54:54,008 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:54:54,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:54:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:54:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-06-12 19:54:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2021-06-12 19:54:54,049 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2021-06-12 19:54:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,050 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2021-06-12 19:54:54,050 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 19:54:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2021-06-12 19:54:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:54,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,051 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 19:54:54,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:54:54,051 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2011052617, now seen corresponding path program 2 times [2021-06-12 19:54:54,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033292832] [2021-06-12 19:54:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,073 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 19:54:54,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033292832] [2021-06-12 19:54:54,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033292832] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:54:54,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598394109] [2021-06-12 19:54:54,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:54:54,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:54:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:54:54,076 INFO L87 Difference]: Start difference. First operand 129 states and 379 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 19:54:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,089 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-06-12 19:54:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:54:54,091 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 19:54:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,093 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:54:54,093 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 19:54:54,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:54:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 19:54:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-06-12 19:54:54,100 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 19:54:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-12 19:54:54,101 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-12 19:54:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,101 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-12 19:54:54,102 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 19:54:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-12 19:54:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:54,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,103 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 19:54:54,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:54:54,103 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1571987321, now seen corresponding path program 3 times [2021-06-12 19:54:54,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737393695] [2021-06-12 19:54:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,143 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 19:54:54,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737393695] [2021-06-12 19:54:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737393695] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:54:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085787330] [2021-06-12 19:54:54,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:54:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:54:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:54:54,150 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 19:54:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,166 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2021-06-12 19:54:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:54:54,167 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 19:54:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,168 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:54:54,168 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 19:54:54,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 19:54:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-06-12 19:54:54,174 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 19:54:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-12 19:54:54,174 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-12 19:54:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,175 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-12 19:54:54,175 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 19:54:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-12 19:54:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:54,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,176 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 19:54:54,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:54:54,176 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2134989050, now seen corresponding path program 1 times [2021-06-12 19:54:54,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029351029] [2021-06-12 19:54:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,228 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 19:54:54,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029351029] [2021-06-12 19:54:54,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029351029] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 19:54:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055091224] [2021-06-12 19:54:54,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:54:54,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:54:54,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:54,230 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,260 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2021-06-12 19:54:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:54:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,262 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:54:54,262 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:54:54,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:54:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:54:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-06-12 19:54:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-12 19:54:54,270 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2021-06-12 19:54:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,271 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-12 19:54:54,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-12 19:54:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:54,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,272 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 19:54:54,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 19:54:54,272 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2040272752, now seen corresponding path program 2 times [2021-06-12 19:54:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485395224] [2021-06-12 19:54:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,338 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 19:54:54,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485395224] [2021-06-12 19:54:54,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485395224] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 19:54:54,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166744322] [2021-06-12 19:54:54,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:54:54,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:54:54,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:54,339 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,438 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2021-06-12 19:54:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,440 INFO L225 Difference]: With dead ends: 372 [2021-06-12 19:54:54,440 INFO L226 Difference]: Without dead ends: 345 [2021-06-12 19:54:54,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:54:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-12 19:54:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-06-12 19:54:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2021-06-12 19:54:54,448 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2021-06-12 19:54:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,448 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2021-06-12 19:54:54,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2021-06-12 19:54:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:54,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,450 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 19:54:54,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 19:54:54,450 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1165937426, now seen corresponding path program 3 times [2021-06-12 19:54:54,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108536405] [2021-06-12 19:54:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,503 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 19:54:54,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108536405] [2021-06-12 19:54:54,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108536405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 19:54:54,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831999091] [2021-06-12 19:54:54,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:54:54,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:54:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:54,505 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,592 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2021-06-12 19:54:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,594 INFO L225 Difference]: With dead ends: 372 [2021-06-12 19:54:54,594 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 19:54:54,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:54:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 19:54:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2021-06-12 19:54:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2021-06-12 19:54:54,606 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2021-06-12 19:54:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,608 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2021-06-12 19:54:54,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2021-06-12 19:54:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:54,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,613 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 19:54:54,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:54:54,614 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1639624874, now seen corresponding path program 4 times [2021-06-12 19:54:54,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923554969] [2021-06-12 19:54:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,676 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 19:54:54,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923554969] [2021-06-12 19:54:54,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923554969] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 19:54:54,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097326812] [2021-06-12 19:54:54,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:54:54,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:54:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:54,678 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,738 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2021-06-12 19:54:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,740 INFO L225 Difference]: With dead ends: 318 [2021-06-12 19:54:54,740 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:54:54,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:54:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:54:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2021-06-12 19:54:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2021-06-12 19:54:54,746 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2021-06-12 19:54:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,746 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2021-06-12 19:54:54,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19:54:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2021-06-12 19:54:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:54,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,747 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 19:54:54,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 19:54:54,747 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,748 INFO L82 PathProgramCache]: Analyzing trace with hash 479941677, now seen corresponding path program 1 times [2021-06-12 19:54:54,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555158871] [2021-06-12 19:54:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,785 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 19:54:54,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555158871] [2021-06-12 19:54:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555158871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:54,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80539230] [2021-06-12 19:54:54,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:54,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:54,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:54,786 INFO L87 Difference]: Start difference. First operand 195 states and 573 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 19:54:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,805 INFO L93 Difference]: Finished difference Result 291 states and 852 transitions. [2021-06-12 19:54:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:54,805 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 19:54:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,807 INFO L225 Difference]: With dead ends: 291 [2021-06-12 19:54:54,807 INFO L226 Difference]: Without dead ends: 291 [2021-06-12 19:54:54,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-12 19:54:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 183. [2021-06-12 19:54:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9835164835164836) internal successors, (543), 182 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 543 transitions. [2021-06-12 19:54:54,811 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 543 transitions. Word has length 19 [2021-06-12 19:54:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,811 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 543 transitions. [2021-06-12 19:54:54,811 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 19:54:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 543 transitions. [2021-06-12 19:54:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:54,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,812 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 19:54:54,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 19:54:54,812 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1607604885, now seen corresponding path program 1 times [2021-06-12 19:54:54,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222612523] [2021-06-12 19:54:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,832 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 19:54:54,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222612523] [2021-06-12 19:54:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222612523] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:54,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931464795] [2021-06-12 19:54:54,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:54,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:54,834 INFO L87 Difference]: Start difference. First operand 183 states and 543 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 19:54:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,854 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2021-06-12 19:54:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:54,855 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 19:54:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,856 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:54:54,856 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:54:54,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:54:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2021-06-12 19:54:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-06-12 19:54:54,861 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-06-12 19:54:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,862 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-06-12 19:54:54,862 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 19:54:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-06-12 19:54:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:54,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,862 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 19:54:54,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 19:54:54,865 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -727237863, now seen corresponding path program 2 times [2021-06-12 19:54:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341262808] [2021-06-12 19:54:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,937 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 19:54:54,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341262808] [2021-06-12 19:54:54,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341262808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:54,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:54,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:54,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241065035] [2021-06-12 19:54:54,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:54,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:54,939 INFO L87 Difference]: Start difference. First operand 183 states and 537 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 19:54:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,981 INFO L93 Difference]: Finished difference Result 279 states and 798 transitions. [2021-06-12 19:54:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:54,981 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 19:54:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,983 INFO L225 Difference]: With dead ends: 279 [2021-06-12 19:54:54,983 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:54:54,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:54:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:54:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-06-12 19:54:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-06-12 19:54:54,988 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-06-12 19:54:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,988 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-06-12 19:54:54,988 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 19:54:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-06-12 19:54:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:54,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,989 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 19:54:54,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:54:54,989 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1821936781, now seen corresponding path program 2 times [2021-06-12 19:54:54,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980497372] [2021-06-12 19:54:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,035 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 19:54:55,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980497372] [2021-06-12 19:54:55,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980497372] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:55,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:55,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:55,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810802961] [2021-06-12 19:54:55,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:55,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:55,037 INFO L87 Difference]: Start difference. First operand 183 states and 537 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 19:54:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,081 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2021-06-12 19:54:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,082 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 19:54:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,083 INFO L225 Difference]: With dead ends: 333 [2021-06-12 19:54:55,083 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 19:54:55,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:54:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 19:54:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2021-06-12 19:54:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-06-12 19:54:55,089 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-06-12 19:54:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,090 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-06-12 19:54:55,090 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 19:54:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-06-12 19:54:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:55,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,091 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 19:54:55,091 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2087354603, now seen corresponding path program 3 times [2021-06-12 19:54:55,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608787516] [2021-06-12 19:54:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,140 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 19:54:55,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608787516] [2021-06-12 19:54:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608787516] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:55,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:55,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540009679] [2021-06-12 19:54:55,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:55,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:55,142 INFO L87 Difference]: Start difference. First operand 201 states and 591 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 19:54:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,172 INFO L93 Difference]: Finished difference Result 280 states and 812 transitions. [2021-06-12 19:54:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,173 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 19:54:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,174 INFO L225 Difference]: With dead ends: 280 [2021-06-12 19:54:55,174 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 19:54:55,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 19:54:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 189. [2021-06-12 19:54:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-06-12 19:54:55,179 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 19 [2021-06-12 19:54:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,179 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-06-12 19:54:55,179 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 19:54:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-06-12 19:54:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:55,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,180 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 19:54:55,180 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2087010031, now seen corresponding path program 3 times [2021-06-12 19:54:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572762099] [2021-06-12 19:54:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,204 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 19:54:55,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572762099] [2021-06-12 19:54:55,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572762099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:55,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:55,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:55,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619103616] [2021-06-12 19:54:55,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:55,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:55,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:55,206 INFO L87 Difference]: Start difference. First operand 189 states and 555 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 19:54:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,229 INFO L93 Difference]: Finished difference Result 220 states and 628 transitions. [2021-06-12 19:54:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,230 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 19:54:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,231 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:54:55,231 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 19:54:55,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 19:54:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-06-12 19:54:55,234 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 19:54:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 19:54:55,235 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-12 19:54:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,235 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 19:54:55,235 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 19:54:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 19:54:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:55,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,235 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 19:54:55,235 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 248842827, now seen corresponding path program 4 times [2021-06-12 19:54:55,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820285719] [2021-06-12 19:54:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,259 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 19:54:55,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820285719] [2021-06-12 19:54:55,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820285719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:55,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:55,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:55,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557960738] [2021-06-12 19:54:55,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:55,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:55,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:55,260 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 19:54:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,292 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2021-06-12 19:54:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,292 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 19:54:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,293 INFO L225 Difference]: With dead ends: 207 [2021-06-12 19:54:55,293 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 19:54:55,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:54:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 19:54:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-06-12 19:54:55,296 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 19:54:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-06-12 19:54:55,297 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-06-12 19:54:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,297 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-06-12 19:54:55,297 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 19:54:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-06-12 19:54:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:55,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,297 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 19:54:55,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 19:54:55,298 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,298 INFO L82 PathProgramCache]: Analyzing trace with hash -16574995, now seen corresponding path program 5 times [2021-06-12 19:54:55,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592281380] [2021-06-12 19:54:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,323 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 19:54:55,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592281380] [2021-06-12 19:54:55,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592281380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:55,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:55,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:55,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474101300] [2021-06-12 19:54:55,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:55,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:55,324 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 19:54:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,353 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-06-12 19:54:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,354 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 19:54:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,354 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:54:55,355 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 19:54:55,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 19:54:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-06-12 19:54:55,358 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 19:54:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 19:54:55,358 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-12 19:54:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,358 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 19:54:55,359 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 19:54:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 19:54:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:54:55,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,359 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 19:54:55,359 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -554430573, now seen corresponding path program 6 times [2021-06-12 19:54:55,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515368458] [2021-06-12 19:54:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,380 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 19:54:55,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515368458] [2021-06-12 19:54:55,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515368458] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:54:55,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:54:55,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:54:55,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555670742] [2021-06-12 19:54:55,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:54:55,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:54:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:54:55,382 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 19:54:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,403 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-06-12 19:54:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,403 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 19:54:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,404 INFO L225 Difference]: With dead ends: 208 [2021-06-12 19:54:55,404 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 19:54:55,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 19:54:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-06-12 19:54:55,407 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 19:54:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 19:54:55,408 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-12 19:54:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,408 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 19:54:55,408 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 19:54:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 19:54:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:54:55,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,409 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 19:54:55,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 19:54:55,409 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1066078798, now seen corresponding path program 1 times [2021-06-12 19:54:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731260352] [2021-06-12 19:54:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:54:55,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731260352] [2021-06-12 19:54:55,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731260352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078153605] [2021-06-12 19:54:55,476 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 19:54:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:54:55,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:54:55,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078153605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:55,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:54:55,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483772264] [2021-06-12 19:54:55,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:54:55,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:54:55,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:54:55,669 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 19:54:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,704 INFO L93 Difference]: Finished difference Result 313 states and 911 transitions. [2021-06-12 19:54:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:54:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 19:54:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,705 INFO L225 Difference]: With dead ends: 313 [2021-06-12 19:54:55,705 INFO L226 Difference]: Without dead ends: 220 [2021-06-12 19:54:55,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:54:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-12 19:54:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-06-12 19:54:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-06-12 19:54:55,712 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 20 [2021-06-12 19:54:55,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,712 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-06-12 19:54:55,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 19:54:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-06-12 19:54:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:54:55,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,713 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 19:54:55,929 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1099695243, now seen corresponding path program 2 times [2021-06-12 19:54:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907135087] [2021-06-12 19:54:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:54:55,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907135087] [2021-06-12 19:54:55,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907135087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214746433] [2021-06-12 19:54:55,974 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 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 19:54:56,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:54:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:54:56,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214746433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:56,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:54:56,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996407377] [2021-06-12 19:54:56,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:54:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:54:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:54:56,108 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 19:54:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:56,162 INFO L93 Difference]: Finished difference Result 344 states and 1003 transitions. [2021-06-12 19:54:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:54:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 19:54:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:56,163 INFO L225 Difference]: With dead ends: 344 [2021-06-12 19:54:56,163 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 19:54:56,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:54:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 19:54:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-06-12 19:54:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.932) internal successors, (733), 250 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 733 transitions. [2021-06-12 19:54:56,168 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 733 transitions. Word has length 21 [2021-06-12 19:54:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:56,168 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 733 transitions. [2021-06-12 19:54:56,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 19:54:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 733 transitions. [2021-06-12 19:54:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:54:56,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:56,168 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:56,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 19:54:56,377 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2141805038, now seen corresponding path program 3 times [2021-06-12 19:54:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:56,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390145687] [2021-06-12 19:54:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:56,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:56,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390145687] [2021-06-12 19:54:56,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390145687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412622502] [2021-06-12 19:54:56,436 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 19:54:56,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:56,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:56,575 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 26 treesize of output 20 [2021-06-12 19:54:56,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:54:56,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:56,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:56,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:37 [2021-06-12 19:54:56,663 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 27 treesize of output 21 [2021-06-12 19:54:56,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:56,667 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:54:56,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-06-12 19:54:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412622502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:56,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 19:54:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705428702] [2021-06-12 19:54:56,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:56,707 INFO L87 Difference]: Start difference. First operand 251 states and 733 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:57,528 INFO L93 Difference]: Finished difference Result 608 states and 1678 transitions. [2021-06-12 19:54:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:54:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 19:54:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:57,530 INFO L225 Difference]: With dead ends: 608 [2021-06-12 19:54:57,530 INFO L226 Difference]: Without dead ends: 411 [2021-06-12 19:54:57,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:54:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-12 19:54:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 312. [2021-06-12 19:54:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.90032154340836) internal successors, (902), 311 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 902 transitions. [2021-06-12 19:54:57,536 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 902 transitions. Word has length 22 [2021-06-12 19:54:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:57,536 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 902 transitions. [2021-06-12 19:54:57,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 902 transitions. [2021-06-12 19:54:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:54:57,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:57,537 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:57,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:57,753 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:57,754 INFO L82 PathProgramCache]: Analyzing trace with hash 535813387, now seen corresponding path program 4 times [2021-06-12 19:54:57,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:57,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656408350] [2021-06-12 19:54:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:57,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:57,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656408350] [2021-06-12 19:54:57,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656408350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:57,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826336860] [2021-06-12 19:54:57,827 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 19:54:57,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:57,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:57,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:54:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:54:57,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826336860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:57,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:57,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:54:57,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136513293] [2021-06-12 19:54:57,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:54:57,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:54:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:54:57,921 INFO L87 Difference]: Start difference. First operand 312 states and 902 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 19:54:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:58,250 INFO L93 Difference]: Finished difference Result 499 states and 1445 transitions. [2021-06-12 19:54:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:54:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23 [2021-06-12 19:54:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:58,252 INFO L225 Difference]: With dead ends: 499 [2021-06-12 19:54:58,252 INFO L226 Difference]: Without dead ends: 377 [2021-06-12 19:54:58,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:54:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-12 19:54:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 347. [2021-06-12 19:54:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.901734104046243) internal successors, (1004), 346 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 19:54:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1004 transitions. [2021-06-12 19:54:58,259 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1004 transitions. Word has length 23 [2021-06-12 19:54:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:58,259 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1004 transitions. [2021-06-12 19:54:58,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 19:54:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1004 transitions. [2021-06-12 19:54:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:54:58,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:58,260 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:58,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:58,473 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1274656876, now seen corresponding path program 5 times [2021-06-12 19:54:58,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:58,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716839479] [2021-06-12 19:54:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:54:58,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716839479] [2021-06-12 19:54:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716839479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150940175] [2021-06-12 19:54:58,686 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 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 19:54:58,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:58,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,819 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 17 treesize of output 13 [2021-06-12 19:54:58,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,822 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 18 treesize of output 14 [2021-06-12 19:54:58,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:58,837 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 19:54:58,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:41 [2021-06-12 19:54:58,989 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:54:58,992 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 19:54:58,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,994 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 19 treesize of output 15 [2021-06-12 19:54:58,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,020 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 12 treesize of output 8 [2021-06-12 19:54:59,022 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:54:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,024 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 12 treesize of output 8 [2021-06-12 19:54:59,026 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:54:59,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:59,043 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 19:54:59,043 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-12 19:54:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:54:59,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150940175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:59,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338477634] [2021-06-12 19:54:59,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:59,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:59,113 INFO L87 Difference]: Start difference. First operand 347 states and 1004 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 19:54:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:59,711 INFO L93 Difference]: Finished difference Result 552 states and 1540 transitions. [2021-06-12 19:54:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:59,711 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 24 [2021-06-12 19:54:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:59,713 INFO L225 Difference]: With dead ends: 552 [2021-06-12 19:54:59,713 INFO L226 Difference]: Without dead ends: 469 [2021-06-12 19:54:59,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-12 19:54:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 349. [2021-06-12 19:54:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8706896551724137) internal successors, (999), 348 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 19:54:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 999 transitions. [2021-06-12 19:54:59,719 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 999 transitions. Word has length 24 [2021-06-12 19:54:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:59,719 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 999 transitions. [2021-06-12 19:54:59,719 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 19:54:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 999 transitions. [2021-06-12 19:54:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:54:59,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:59,720 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:59,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 19:54:59,929 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1282338604, now seen corresponding path program 6 times [2021-06-12 19:54:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:59,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37022856] [2021-06-12 19:54:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:00,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:00,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37022856] [2021-06-12 19:55:00,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37022856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658661728] [2021-06-12 19:55:00,125 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 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 19:55:00,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:00,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:00,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:00,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:00,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,248 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 18 treesize of output 14 [2021-06-12 19:55:00,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:00,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:00,266 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 19:55:00,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:41 [2021-06-12 19:55:00,353 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_4], 1=[o_0, v_prenex_3]} [2021-06-12 19:55:00,356 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 19:55:00,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,359 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 19 treesize of output 15 [2021-06-12 19:55:00,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:00,414 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 20 treesize of output 16 [2021-06-12 19:55:00,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,419 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 20 treesize of output 16 [2021-06-12 19:55:00,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:00,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,466 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 12 treesize of output 8 [2021-06-12 19:55:00,468 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:00,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,471 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 12 treesize of output 8 [2021-06-12 19:55:00,472 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:00,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:00,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,523 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 13 treesize of output 9 [2021-06-12 19:55:00,525 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:00,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,528 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 13 treesize of output 9 [2021-06-12 19:55:00,530 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:00,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:00,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:00,570 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-06-12 19:55:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:00,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658661728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:00,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:00,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479030079] [2021-06-12 19:55:00,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:00,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:00,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:00,684 INFO L87 Difference]: Start difference. First operand 349 states and 999 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:01,465 INFO L93 Difference]: Finished difference Result 557 states and 1563 transitions. [2021-06-12 19:55:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:01,467 INFO L225 Difference]: With dead ends: 557 [2021-06-12 19:55:01,467 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 19:55:01,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 706.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 19:55:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 351. [2021-06-12 19:55:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.862857142857143) internal successors, (1002), 350 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 19:55:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1002 transitions. [2021-06-12 19:55:01,476 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1002 transitions. Word has length 24 [2021-06-12 19:55:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:01,476 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1002 transitions. [2021-06-12 19:55:01,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1002 transitions. [2021-06-12 19:55:01,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:01,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:01,476 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:01,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 19:55:01,693 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1261019758, now seen corresponding path program 7 times [2021-06-12 19:55:01,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:01,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137364154] [2021-06-12 19:55:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:01,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:01,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137364154] [2021-06-12 19:55:01,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137364154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:01,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139272464] [2021-06-12 19:55:01,908 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 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 19:55:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:02,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,263 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 25 treesize of output 19 [2021-06-12 19:55:02,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,267 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 26 treesize of output 20 [2021-06-12 19:55:02,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:02,289 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 19:55:02,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:59 [2021-06-12 19:55:02,387 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:55:02,389 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 27 treesize of output 21 [2021-06-12 19:55:02,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:55:02,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,414 INFO L628 ElimStorePlain]: treesize reduction 49, result has 36.4 percent of original size [2021-06-12 19:55:02,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,417 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 7 [2021-06-12 19:55:02,418 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:02,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:02,425 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 19:55:02,425 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:12 [2021-06-12 19:55:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:02,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139272464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:02,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:02,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:02,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561526721] [2021-06-12 19:55:02,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:02,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:02,473 INFO L87 Difference]: Start difference. First operand 351 states and 1002 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:02,675 INFO L93 Difference]: Finished difference Result 430 states and 1190 transitions. [2021-06-12 19:55:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:02,676 INFO L225 Difference]: With dead ends: 430 [2021-06-12 19:55:02,676 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 19:55:02,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 19:55:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 353. [2021-06-12 19:55:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.8607954545454546) internal successors, (1007), 352 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1007 transitions. [2021-06-12 19:55:02,682 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1007 transitions. Word has length 24 [2021-06-12 19:55:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:02,682 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1007 transitions. [2021-06-12 19:55:02,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1007 transitions. [2021-06-12 19:55:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:02,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:02,683 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:02,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 19:55:02,897 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash -476952058, now seen corresponding path program 8 times [2021-06-12 19:55:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:02,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074753979] [2021-06-12 19:55:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:03,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074753979] [2021-06-12 19:55:03,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074753979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108221926] [2021-06-12 19:55:03,049 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 19:55:03,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,193 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 26 treesize of output 20 [2021-06-12 19:55:03,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,196 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 25 treesize of output 19 [2021-06-12 19:55:03,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:03,221 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 19:55:03,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:55 [2021-06-12 19:55:03,314 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_8, o_4], 1=[o_0, v_prenex_7]} [2021-06-12 19:55:03,317 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 20 treesize of output 16 [2021-06-12 19:55:03,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:03,345 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 19:55:03,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:03,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,370 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 12 treesize of output 8 [2021-06-12 19:55:03,372 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:03,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:03,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,398 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 13 treesize of output 9 [2021-06-12 19:55:03,401 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:03,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:03,422 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 19:55:03,423 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-06-12 19:55:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:03,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108221926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:03,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:03,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:03,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685652043] [2021-06-12 19:55:03,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:03,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:03,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:03,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:03,499 INFO L87 Difference]: Start difference. First operand 353 states and 1007 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:03,704 INFO L93 Difference]: Finished difference Result 422 states and 1182 transitions. [2021-06-12 19:55:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:03,706 INFO L225 Difference]: With dead ends: 422 [2021-06-12 19:55:03,706 INFO L226 Difference]: Without dead ends: 387 [2021-06-12 19:55:03,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-12 19:55:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 355. [2021-06-12 19:55:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.853107344632768) internal successors, (1010), 354 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 19:55:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1010 transitions. [2021-06-12 19:55:03,712 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1010 transitions. Word has length 24 [2021-06-12 19:55:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:03,712 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1010 transitions. [2021-06-12 19:55:03,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1010 transitions. [2021-06-12 19:55:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:03,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:03,713 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:03,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 19:55:03,927 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1014444914, now seen corresponding path program 9 times [2021-06-12 19:55:03,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:03,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577462130] [2021-06-12 19:55:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:04,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:04,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577462130] [2021-06-12 19:55:04,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577462130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397500868] [2021-06-12 19:55:04,123 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 19:55:04,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:04,262 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 27 treesize of output 21 [2021-06-12 19:55:04,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,265 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 27 treesize of output 21 [2021-06-12 19:55:04,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:04,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:04,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:87, output treesize:71 [2021-06-12 19:55:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:04,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,381 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 20 treesize of output 16 [2021-06-12 19:55:04,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 19:55:04,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,388 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 19 treesize of output 15 [2021-06-12 19:55:04,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,454 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-06-12 19:55:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,457 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 13 treesize of output 9 [2021-06-12 19:55:04,459 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,462 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 12 treesize of output 8 [2021-06-12 19:55:04,463 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:04,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:04,492 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 19:55:04,492 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:177, output treesize:47 [2021-06-12 19:55:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:04,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397500868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:04,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:04,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757852214] [2021-06-12 19:55:04,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:04,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:04,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:04,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:04,584 INFO L87 Difference]: Start difference. First operand 355 states and 1010 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:04,838 INFO L93 Difference]: Finished difference Result 428 states and 1183 transitions. [2021-06-12 19:55:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:04,840 INFO L225 Difference]: With dead ends: 428 [2021-06-12 19:55:04,840 INFO L226 Difference]: Without dead ends: 375 [2021-06-12 19:55:04,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-12 19:55:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 357. [2021-06-12 19:55:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.851123595505618) internal successors, (1015), 356 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 19:55:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1015 transitions. [2021-06-12 19:55:04,845 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1015 transitions. Word has length 24 [2021-06-12 19:55:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:04,845 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1015 transitions. [2021-06-12 19:55:04,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1015 transitions. [2021-06-12 19:55:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:04,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:04,846 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:05,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:05,063 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash -952364244, now seen corresponding path program 10 times [2021-06-12 19:55:05,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:05,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841322557] [2021-06-12 19:55:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:05,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841322557] [2021-06-12 19:55:05,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841322557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524301065] [2021-06-12 19:55:05,265 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 19:55:05,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:05,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:05,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:05,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,381 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 17 treesize of output 13 [2021-06-12 19:55:05,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,386 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 18 treesize of output 14 [2021-06-12 19:55:05,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:05,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:05,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:05,612 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:55:05,614 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 19 treesize of output 15 [2021-06-12 19:55:05,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,617 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 19 treesize of output 15 [2021-06-12 19:55:05,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,659 INFO L628 ElimStorePlain]: treesize reduction 38, result has 43.3 percent of original size [2021-06-12 19:55:05,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,661 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 8 [2021-06-12 19:55:05,663 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:05,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,670 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 19:55:05,670 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2021-06-12 19:55:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:05,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524301065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:05,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659449346] [2021-06-12 19:55:05,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:05,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:05,706 INFO L87 Difference]: Start difference. First operand 357 states and 1015 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:06,311 INFO L93 Difference]: Finished difference Result 818 states and 2189 transitions. [2021-06-12 19:55:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:55:06,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:06,314 INFO L225 Difference]: With dead ends: 818 [2021-06-12 19:55:06,314 INFO L226 Difference]: Without dead ends: 718 [2021-06-12 19:55:06,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 667.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-12 19:55:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 384. [2021-06-12 19:55:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8590078328981723) internal successors, (1095), 383 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:06,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1095 transitions. [2021-06-12 19:55:06,321 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1095 transitions. Word has length 24 [2021-06-12 19:55:06,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:06,321 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1095 transitions. [2021-06-12 19:55:06,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1095 transitions. [2021-06-12 19:55:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:06,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:06,322 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:06,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:06,538 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1240342834, now seen corresponding path program 11 times [2021-06-12 19:55:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:06,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976829147] [2021-06-12 19:55:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:06,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976829147] [2021-06-12 19:55:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976829147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103439573] [2021-06-12 19:55:06,703 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 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 19:55:06,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:06,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:06,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,803 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 19:55:06,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,805 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 18 treesize of output 14 [2021-06-12 19:55:06,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:06,822 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 19:55:06,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-12 19:55:07,011 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:55:07,014 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 19:55:07,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,018 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 19:55:07,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,040 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 12 treesize of output 8 [2021-06-12 19:55:07,041 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:07,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:55:07,045 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:07,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,063 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 19:55:07,063 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-12 19:55:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103439573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:07,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:07,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:07,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196925245] [2021-06-12 19:55:07,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:07,119 INFO L87 Difference]: Start difference. First operand 384 states and 1095 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:08,266 INFO L93 Difference]: Finished difference Result 768 states and 2119 transitions. [2021-06-12 19:55:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:55:08,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:08,268 INFO L225 Difference]: With dead ends: 768 [2021-06-12 19:55:08,268 INFO L226 Difference]: Without dead ends: 682 [2021-06-12 19:55:08,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1062.2ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-12 19:55:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 397. [2021-06-12 19:55:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.8737373737373737) internal successors, (1138), 396 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1138 transitions. [2021-06-12 19:55:08,276 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1138 transitions. Word has length 24 [2021-06-12 19:55:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:08,276 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1138 transitions. [2021-06-12 19:55:08,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1138 transitions. [2021-06-12 19:55:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:08,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:08,276 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:08,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 19:55:08,493 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash -497628982, now seen corresponding path program 12 times [2021-06-12 19:55:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:08,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243266704] [2021-06-12 19:55:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:08,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243266704] [2021-06-12 19:55:08,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243266704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602374121] [2021-06-12 19:55:08,676 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 19:55:08,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:08,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:08,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,767 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 18 treesize of output 14 [2021-06-12 19:55:08,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,770 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 17 treesize of output 13 [2021-06-12 19:55:08,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,774 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 17 treesize of output 13 [2021-06-12 19:55:08,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,777 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 18 treesize of output 14 [2021-06-12 19:55:08,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:08,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:08,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:08,990 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_17], 1=[o_0, v_prenex_16]} [2021-06-12 19:55:08,992 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 20 treesize of output 16 [2021-06-12 19:55:08,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,012 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 27 treesize of output 21 [2021-06-12 19:55:09,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,031 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 13 treesize of output 9 [2021-06-12 19:55:09,033 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:09,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,055 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 11 treesize of output 7 [2021-06-12 19:55:09,057 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:09,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,077 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 19:55:09,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-06-12 19:55:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:09,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602374121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:09,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:09,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:09,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313104122] [2021-06-12 19:55:09,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:09,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:09,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:09,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:09,144 INFO L87 Difference]: Start difference. First operand 397 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:09,777 INFO L93 Difference]: Finished difference Result 794 states and 2154 transitions. [2021-06-12 19:55:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:55:09,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:09,784 INFO L225 Difference]: With dead ends: 794 [2021-06-12 19:55:09,784 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 19:55:09,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 744.9ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 19:55:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 403. [2021-06-12 19:55:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.8781094527363185) internal successors, (1157), 402 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1157 transitions. [2021-06-12 19:55:09,792 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1157 transitions. Word has length 24 [2021-06-12 19:55:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:09,792 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1157 transitions. [2021-06-12 19:55:09,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1157 transitions. [2021-06-12 19:55:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:09,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:09,793 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:10,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 19:55:10,009 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash -786675028, now seen corresponding path program 13 times [2021-06-12 19:55:10,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:10,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322924039] [2021-06-12 19:55:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:10,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322924039] [2021-06-12 19:55:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322924039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778885730] [2021-06-12 19:55:10,187 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 19:55:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:10,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,275 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 17 treesize of output 13 [2021-06-12 19:55:10,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,278 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 17 treesize of output 13 [2021-06-12 19:55:10,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:10,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,285 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 18 treesize of output 14 [2021-06-12 19:55:10,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:10,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:10,324 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:10,490 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 37 treesize of output 29 [2021-06-12 19:55:10,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,493 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 37 treesize of output 29 [2021-06-12 19:55:10,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,496 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 37 treesize of output 29 [2021-06-12 19:55:10,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,499 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 37 treesize of output 29 [2021-06-12 19:55:10,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,518 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-06-12 19:55:10,519 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:10,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,519 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-06-12 19:55:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:10,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778885730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:10,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:10,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17601246] [2021-06-12 19:55:10,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:10,558 INFO L87 Difference]: Start difference. First operand 403 states and 1157 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 19:55:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:10,847 INFO L93 Difference]: Finished difference Result 656 states and 1797 transitions. [2021-06-12 19:55:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:10,847 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 24 [2021-06-12 19:55:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:10,849 INFO L225 Difference]: With dead ends: 656 [2021-06-12 19:55:10,849 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 19:55:10,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 19:55:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 386. [2021-06-12 19:55:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.864935064935065) internal successors, (1103), 385 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1103 transitions. [2021-06-12 19:55:10,856 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1103 transitions. Word has length 24 [2021-06-12 19:55:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:10,856 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1103 transitions. [2021-06-12 19:55:10,856 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 19:55:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1103 transitions. [2021-06-12 19:55:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:10,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:10,856 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:11,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 19:55:11,065 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1760539924, now seen corresponding path program 14 times [2021-06-12 19:55:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:11,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456337148] [2021-06-12 19:55:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:11,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456337148] [2021-06-12 19:55:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456337148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395029516] [2021-06-12 19:55:11,228 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 19:55:11,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:11,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,306 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 18 treesize of output 14 [2021-06-12 19:55:11,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,309 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 19:55:11,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,325 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 19:55:11,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-12 19:55:11,452 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:55:11,453 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 19:55:11,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,462 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 12 treesize of output 8 [2021-06-12 19:55:11,463 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:11,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,469 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 19:55:11,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-12 19:55:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:11,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395029516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:11,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:11,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344238143] [2021-06-12 19:55:11,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:11,510 INFO L87 Difference]: Start difference. First operand 386 states and 1103 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:12,046 INFO L93 Difference]: Finished difference Result 612 states and 1755 transitions. [2021-06-12 19:55:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:12,048 INFO L225 Difference]: With dead ends: 612 [2021-06-12 19:55:12,048 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 19:55:12,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 19:55:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 402. [2021-06-12 19:55:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.920199501246883) internal successors, (1171), 401 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1171 transitions. [2021-06-12 19:55:12,055 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1171 transitions. Word has length 24 [2021-06-12 19:55:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:12,055 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1171 transitions. [2021-06-12 19:55:12,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1171 transitions. [2021-06-12 19:55:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:12,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:12,055 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:12,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:12,273 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1849057620, now seen corresponding path program 15 times [2021-06-12 19:55:12,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:12,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465411645] [2021-06-12 19:55:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:12,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465411645] [2021-06-12 19:55:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465411645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225519496] [2021-06-12 19:55:12,481 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 19:55:12,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:12,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,575 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 19:55:12,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:12,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,579 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 18 treesize of output 14 [2021-06-12 19:55:12,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:12,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:12,608 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 19:55:12,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-06-12 19:55:12,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:12,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,867 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 19:55:12,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:12,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:55:12,936 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:12,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,942 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 12 treesize of output 8 [2021-06-12 19:55:12,943 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:12,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:13,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,007 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 19:55:13,008 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:55:13,068 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:13,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:55:13,073 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:13,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:13,124 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-06-12 19:55:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:13,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225519496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:13,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:13,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856404449] [2021-06-12 19:55:13,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:13,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:13,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:13,232 INFO L87 Difference]: Start difference. First operand 402 states and 1171 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:14,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:14,180 INFO L93 Difference]: Finished difference Result 835 states and 2298 transitions. [2021-06-12 19:55:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:14,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:14,183 INFO L225 Difference]: With dead ends: 835 [2021-06-12 19:55:14,183 INFO L226 Difference]: Without dead ends: 742 [2021-06-12 19:55:14,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 977.6ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-12 19:55:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 411. [2021-06-12 19:55:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.9414634146341463) internal successors, (1206), 410 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1206 transitions. [2021-06-12 19:55:14,199 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1206 transitions. Word has length 24 [2021-06-12 19:55:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:14,199 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1206 transitions. [2021-06-12 19:55:14,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1206 transitions. [2021-06-12 19:55:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:14,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:14,200 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:14,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 19:55:14,413 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1952155890, now seen corresponding path program 16 times [2021-06-12 19:55:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:14,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054809802] [2021-06-12 19:55:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:14,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054809802] [2021-06-12 19:55:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054809802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42300444] [2021-06-12 19:55:14,609 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 19:55:14,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:14,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:14,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,707 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 17 treesize of output 13 [2021-06-12 19:55:14,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,711 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 17 treesize of output 13 [2021-06-12 19:55:14,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,715 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 18 treesize of output 14 [2021-06-12 19:55:14,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,719 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 18 treesize of output 14 [2021-06-12 19:55:14,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:14,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:14,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 19:55:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,052 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 19:55:15,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,055 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 19:55:15,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,086 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-12 19:55:15,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:55:15,097 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:15,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:15,108 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 19:55:15,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-12 19:55:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:15,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42300444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:15,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:15,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:15,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213046538] [2021-06-12 19:55:15,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:15,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:15,159 INFO L87 Difference]: Start difference. First operand 411 states and 1206 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:15,657 INFO L93 Difference]: Finished difference Result 648 states and 1817 transitions. [2021-06-12 19:55:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:55:15,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:15,659 INFO L225 Difference]: With dead ends: 648 [2021-06-12 19:55:15,659 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 19:55:15,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 589.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:55:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 19:55:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 404. [2021-06-12 19:55:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.9181141439205955) internal successors, (1176), 403 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1176 transitions. [2021-06-12 19:55:15,665 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1176 transitions. Word has length 24 [2021-06-12 19:55:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:15,665 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1176 transitions. [2021-06-12 19:55:15,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1176 transitions. [2021-06-12 19:55:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:15,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:15,666 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:15,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:15,870 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash 631569172, now seen corresponding path program 17 times [2021-06-12 19:55:15,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:15,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898074914] [2021-06-12 19:55:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:16,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:16,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898074914] [2021-06-12 19:55:16,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898074914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:16,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471951506] [2021-06-12 19:55:16,073 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 19:55:16,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:55:16,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:16,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,189 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 18 treesize of output 14 [2021-06-12 19:55:16,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,194 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 17 treesize of output 13 [2021-06-12 19:55:16,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,198 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 18 treesize of output 14 [2021-06-12 19:55:16,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:16,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:16,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 19:55:16,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,579 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 19:55:16,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:55:16,612 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:16,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,641 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 19 treesize of output 15 [2021-06-12 19:55:16,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,669 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 12 treesize of output 8 [2021-06-12 19:55:16,670 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:16,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,694 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 19:55:16,694 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:34 [2021-06-12 19:55:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:16,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471951506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:16,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:16,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339369760] [2021-06-12 19:55:16,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:16,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:16,789 INFO L87 Difference]: Start difference. First operand 404 states and 1176 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:17,643 INFO L93 Difference]: Finished difference Result 763 states and 2157 transitions. [2021-06-12 19:55:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:17,645 INFO L225 Difference]: With dead ends: 763 [2021-06-12 19:55:17,645 INFO L226 Difference]: Without dead ends: 686 [2021-06-12 19:55:17,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 903.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-12 19:55:17,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 418. [2021-06-12 19:55:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.971223021582734) internal successors, (1239), 417 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1239 transitions. [2021-06-12 19:55:17,652 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1239 transitions. Word has length 24 [2021-06-12 19:55:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:17,652 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1239 transitions. [2021-06-12 19:55:17,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1239 transitions. [2021-06-12 19:55:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:17,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:17,653 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:17,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 19:55:17,853 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1978562356, now seen corresponding path program 18 times [2021-06-12 19:55:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:17,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63842518] [2021-06-12 19:55:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:18,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:18,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63842518] [2021-06-12 19:55:18,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63842518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728893295] [2021-06-12 19:55:18,055 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 19:55:18,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:18,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:18,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,268 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 18 treesize of output 14 [2021-06-12 19:55:18,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,271 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 17 treesize of output 13 [2021-06-12 19:55:18,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:18,301 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 19:55:18,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 19:55:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:18,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,435 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 19:55:18,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,464 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-12 19:55:18,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,471 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 7 [2021-06-12 19:55:18,472 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:18,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:18,482 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 19:55:18,482 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-12 19:55:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:18,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728893295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:18,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:18,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360820799] [2021-06-12 19:55:18,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:18,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:18,518 INFO L87 Difference]: Start difference. First operand 418 states and 1239 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:18,726 INFO L93 Difference]: Finished difference Result 498 states and 1431 transitions. [2021-06-12 19:55:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:18,728 INFO L225 Difference]: With dead ends: 498 [2021-06-12 19:55:18,728 INFO L226 Difference]: Without dead ends: 439 [2021-06-12 19:55:18,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-12 19:55:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 419. [2021-06-12 19:55:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.973684210526316) internal successors, (1243), 418 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 19:55:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1243 transitions. [2021-06-12 19:55:18,733 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1243 transitions. Word has length 24 [2021-06-12 19:55:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:18,733 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1243 transitions. [2021-06-12 19:55:18,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1243 transitions. [2021-06-12 19:55:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:18,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:18,734 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:18,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:18,950 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash 578433124, now seen corresponding path program 19 times [2021-06-12 19:55:18,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:18,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761706081] [2021-06-12 19:55:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:19,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761706081] [2021-06-12 19:55:19,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761706081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695642303] [2021-06-12 19:55:19,135 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 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 19:55:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:19,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:19,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:19,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,310 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 18 treesize of output 14 [2021-06-12 19:55:19,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,313 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 17 treesize of output 13 [2021-06-12 19:55:19,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:19,340 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 19:55:19,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 19:55:19,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,418 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 20 treesize of output 16 [2021-06-12 19:55:19,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:19,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,448 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 8 [2021-06-12 19:55:19,450 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:19,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:19,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,489 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 19:55:19,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:19,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,516 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 12 treesize of output 8 [2021-06-12 19:55:19,518 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:19,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:19,542 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 19:55:19,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-12 19:55:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:19,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695642303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:19,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:19,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635781177] [2021-06-12 19:55:19,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:19,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:19,614 INFO L87 Difference]: Start difference. First operand 419 states and 1243 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:19,834 INFO L93 Difference]: Finished difference Result 490 states and 1423 transitions. [2021-06-12 19:55:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:19,836 INFO L225 Difference]: With dead ends: 490 [2021-06-12 19:55:19,836 INFO L226 Difference]: Without dead ends: 455 [2021-06-12 19:55:19,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-12 19:55:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 421. [2021-06-12 19:55:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.9714285714285715) internal successors, (1248), 420 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 19:55:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1248 transitions. [2021-06-12 19:55:19,841 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1248 transitions. Word has length 24 [2021-06-12 19:55:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:19,842 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1248 transitions. [2021-06-12 19:55:19,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1248 transitions. [2021-06-12 19:55:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:19,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:19,842 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:20,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:20,049 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash 40940268, now seen corresponding path program 20 times [2021-06-12 19:55:20,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:20,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016756058] [2021-06-12 19:55:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:20,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:20,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016756058] [2021-06-12 19:55:20,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016756058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:20,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968070911] [2021-06-12 19:55:20,237 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 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 19:55:20,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:20,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,396 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 27 treesize of output 21 [2021-06-12 19:55:20,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,400 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 27 treesize of output 21 [2021-06-12 19:55:20,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,434 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 19:55:20,434 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:99, output treesize:83 [2021-06-12 19:55:20,505 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 19:55:20,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,509 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 30 treesize of output 24 [2021-06-12 19:55:20,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,514 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 20 treesize of output 16 [2021-06-12 19:55:20,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,518 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 19 treesize of output 15 [2021-06-12 19:55:20,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,521 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 29 treesize of output 23 [2021-06-12 19:55:20,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,609 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.4 percent of original size [2021-06-12 19:55:20,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,612 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 12 treesize of output 8 [2021-06-12 19:55:20,614 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,617 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 7 [2021-06-12 19:55:20,618 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:20,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,676 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 19:55:20,677 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:47 [2021-06-12 19:55:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:20,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968070911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:20,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:20,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:20,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774534814] [2021-06-12 19:55:20,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:20,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:20,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:20,751 INFO L87 Difference]: Start difference. First operand 421 states and 1248 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 19:55:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:21,015 INFO L93 Difference]: Finished difference Result 494 states and 1421 transitions. [2021-06-12 19:55:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:21,016 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 24 [2021-06-12 19:55:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:21,017 INFO L225 Difference]: With dead ends: 494 [2021-06-12 19:55:21,017 INFO L226 Difference]: Without dead ends: 441 [2021-06-12 19:55:21,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-12 19:55:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 419. [2021-06-12 19:55:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.973684210526316) internal successors, (1243), 418 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 19:55:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1243 transitions. [2021-06-12 19:55:21,023 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1243 transitions. Word has length 24 [2021-06-12 19:55:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:21,023 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1243 transitions. [2021-06-12 19:55:21,023 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 19:55:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1243 transitions. [2021-06-12 19:55:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:21,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:21,024 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:21,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 19:55:21,237 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1427702638, now seen corresponding path program 21 times [2021-06-12 19:55:21,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:21,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118762008] [2021-06-12 19:55:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:21,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118762008] [2021-06-12 19:55:21,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118762008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758017355] [2021-06-12 19:55:21,401 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 19:55:21,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:55:21,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,538 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 17 treesize of output 13 [2021-06-12 19:55:21,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,542 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 17 treesize of output 13 [2021-06-12 19:55:21,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:21,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:21,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:21,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:21,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:21,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:21,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:21,617 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:55:21,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,884 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 19:55:21,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:21,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:21,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:21,896 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 7 [2021-06-12 19:55:21,897 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:21,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:21,906 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 19:55:21,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-12 19:55:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:21,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758017355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:21,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:21,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:21,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488496548] [2021-06-12 19:55:21,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:21,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:21,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:21,942 INFO L87 Difference]: Start difference. First operand 419 states and 1243 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:22,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:22,389 INFO L93 Difference]: Finished difference Result 532 states and 1540 transitions. [2021-06-12 19:55:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:22,391 INFO L225 Difference]: With dead ends: 532 [2021-06-12 19:55:22,391 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 19:55:22,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 536.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 19:55:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 434. [2021-06-12 19:55:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.9815242494226326) internal successors, (1291), 433 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1291 transitions. [2021-06-12 19:55:22,397 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1291 transitions. Word has length 24 [2021-06-12 19:55:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:22,397 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1291 transitions. [2021-06-12 19:55:22,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1291 transitions. [2021-06-12 19:55:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:22,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:22,398 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:22,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:22,616 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash -310269178, now seen corresponding path program 22 times [2021-06-12 19:55:22,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:22,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419081889] [2021-06-12 19:55:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:22,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419081889] [2021-06-12 19:55:22,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419081889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:22,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654404214] [2021-06-12 19:55:22,827 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 19:55:22,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:22,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,983 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 17 treesize of output 13 [2021-06-12 19:55:22,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,986 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 18 treesize of output 14 [2021-06-12 19:55:22,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,990 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 19:55:22,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,994 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 18 treesize of output 14 [2021-06-12 19:55:22,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:23,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:55:23,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,286 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 19:55:23,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,319 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 11 treesize of output 7 [2021-06-12 19:55:23,320 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:23,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,352 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 20 treesize of output 16 [2021-06-12 19:55:23,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,379 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 13 treesize of output 9 [2021-06-12 19:55:23,381 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:23,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,405 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 19:55:23,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-12 19:55:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:23,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654404214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:23,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:23,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:55:23,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684057138] [2021-06-12 19:55:23,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:23,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:23,469 INFO L87 Difference]: Start difference. First operand 434 states and 1291 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 19:55:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:23,830 INFO L93 Difference]: Finished difference Result 599 states and 1701 transitions. [2021-06-12 19:55:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:23,830 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 24 [2021-06-12 19:55:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:23,832 INFO L225 Difference]: With dead ends: 599 [2021-06-12 19:55:23,832 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 19:55:23,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 19:55:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 434. [2021-06-12 19:55:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.9861431870669746) internal successors, (1293), 433 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1293 transitions. [2021-06-12 19:55:23,838 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1293 transitions. Word has length 24 [2021-06-12 19:55:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:23,838 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1293 transitions. [2021-06-12 19:55:23,838 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 19:55:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1293 transitions. [2021-06-12 19:55:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:23,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:23,839 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:24,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:24,053 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:24,053 INFO L82 PathProgramCache]: Analyzing trace with hash -90973202, now seen corresponding path program 23 times [2021-06-12 19:55:24,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:24,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79566973] [2021-06-12 19:55:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:24,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79566973] [2021-06-12 19:55:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79566973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787911303] [2021-06-12 19:55:24,233 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 19:55:24,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:24,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:24,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:24,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:24,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,339 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 17 treesize of output 13 [2021-06-12 19:55:24,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:24,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:24,372 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 19:55:24,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 19:55:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,530 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 19:55:24,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:24,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:24,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,562 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 11 treesize of output 7 [2021-06-12 19:55:24,563 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:24,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,565 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 11 treesize of output 7 [2021-06-12 19:55:24,566 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:24,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:24,593 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 19:55:24,593 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 19:55:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:24,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787911303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:24,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:24,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:24,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973110287] [2021-06-12 19:55:24,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:24,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:24,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:24,645 INFO L87 Difference]: Start difference. First operand 434 states and 1293 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:25,129 INFO L93 Difference]: Finished difference Result 560 states and 1616 transitions. [2021-06-12 19:55:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:25,131 INFO L225 Difference]: With dead ends: 560 [2021-06-12 19:55:25,131 INFO L226 Difference]: Without dead ends: 497 [2021-06-12 19:55:25,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-12 19:55:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 429. [2021-06-12 19:55:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.9742990654205608) internal successors, (1273), 428 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1273 transitions. [2021-06-12 19:55:25,137 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1273 transitions. Word has length 24 [2021-06-12 19:55:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:25,137 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1273 transitions. [2021-06-12 19:55:25,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1273 transitions. [2021-06-12 19:55:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:25,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:25,138 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:25,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:25,353 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2124609682, now seen corresponding path program 24 times [2021-06-12 19:55:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:25,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095956428] [2021-06-12 19:55:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:25,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:25,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095956428] [2021-06-12 19:55:25,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095956428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:25,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412182204] [2021-06-12 19:55:25,581 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 19:55:25,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:55:25,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:25,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:25,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,721 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 19:55:25,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,725 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 18 treesize of output 14 [2021-06-12 19:55:25,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,729 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 17 treesize of output 13 [2021-06-12 19:55:25,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:25,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:25,800 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:55:26,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,033 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 19 treesize of output 15 [2021-06-12 19:55:26,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:26,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,117 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-06-12 19:55:26,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:26,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:55:26,153 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:26,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:26,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,182 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 11 treesize of output 7 [2021-06-12 19:55:26,184 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:26,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:26,211 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 19:55:26,211 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-06-12 19:55:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:26,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412182204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:26,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:26,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:26,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868249927] [2021-06-12 19:55:26,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:26,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:26,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:26,283 INFO L87 Difference]: Start difference. First operand 429 states and 1273 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:26,835 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-12 19:55:27,303 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-12 19:55:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,847 INFO L93 Difference]: Finished difference Result 1277 states and 3444 transitions. [2021-06-12 19:55:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:55:27,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,850 INFO L225 Difference]: With dead ends: 1277 [2021-06-12 19:55:27,850 INFO L226 Difference]: Without dead ends: 1101 [2021-06-12 19:55:27,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1539.2ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-12 19:55:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 443. [2021-06-12 19:55:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.006787330316742) internal successors, (1329), 442 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 19:55:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1329 transitions. [2021-06-12 19:55:27,859 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1329 transitions. Word has length 24 [2021-06-12 19:55:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1329 transitions. [2021-06-12 19:55:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1329 transitions. [2021-06-12 19:55:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:27,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,860 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:28,076 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1996465444, now seen corresponding path program 25 times [2021-06-12 19:55:28,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521548225] [2021-06-12 19:55:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:28,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521548225] [2021-06-12 19:55:28,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521548225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:28,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868055051] [2021-06-12 19:55:28,243 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 19:55:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:28,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:28,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:28,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,398 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 18 treesize of output 14 [2021-06-12 19:55:28,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,402 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 18 treesize of output 14 [2021-06-12 19:55:28,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:28,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:55:28,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,618 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 20 treesize of output 16 [2021-06-12 19:55:28,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,624 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 20 treesize of output 16 [2021-06-12 19:55:28,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,831 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-12 19:55:28,831 INFO L628 ElimStorePlain]: treesize reduction 189, result has 54.2 percent of original size [2021-06-12 19:55:28,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,835 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 13 treesize of output 9 [2021-06-12 19:55:28,837 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:28,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:28,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,012 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 19 treesize of output 15 [2021-06-12 19:55:29,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:55:29,096 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:29,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,178 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 7 [2021-06-12 19:55:29,179 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:29,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,268 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 9 treesize of output 7 [2021-06-12 19:55:29,269 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-06-12 19:55:29,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:29,349 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:425, output treesize:108 [2021-06-12 19:55:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:29,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868055051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:29,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:29,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373166524] [2021-06-12 19:55:29,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:29,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:29,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:29,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:29,490 INFO L87 Difference]: Start difference. First operand 443 states and 1329 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 19:55:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:29,987 INFO L93 Difference]: Finished difference Result 693 states and 1996 transitions. [2021-06-12 19:55:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:55:29,988 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 24 [2021-06-12 19:55:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:29,989 INFO L225 Difference]: With dead ends: 693 [2021-06-12 19:55:29,989 INFO L226 Difference]: Without dead ends: 597 [2021-06-12 19:55:29,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-12 19:55:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 466. [2021-06-12 19:55:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0236559139784944) internal successors, (1406), 465 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 19:55:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1406 transitions. [2021-06-12 19:55:29,995 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1406 transitions. Word has length 24 [2021-06-12 19:55:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:29,995 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1406 transitions. [2021-06-12 19:55:29,995 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 19:55:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1406 transitions. [2021-06-12 19:55:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:29,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:29,996 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:30,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-12 19:55:30,213 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1116191908, now seen corresponding path program 26 times [2021-06-12 19:55:30,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:30,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832934251] [2021-06-12 19:55:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:30,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832934251] [2021-06-12 19:55:30,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832934251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901114932] [2021-06-12 19:55:30,395 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 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 19:55:30,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:30,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,544 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 17 treesize of output 13 [2021-06-12 19:55:30,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:30,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:30,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,556 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 19:55:30,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:30,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:30,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:55:30,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,758 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 19:55:30,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:30,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,823 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 20 treesize of output 16 [2021-06-12 19:55:30,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,886 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 20 treesize of output 16 [2021-06-12 19:55:30,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,948 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 13 treesize of output 9 [2021-06-12 19:55:30,950 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:31,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,015 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 19 treesize of output 15 [2021-06-12 19:55:31,016 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,073 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 12 treesize of output 8 [2021-06-12 19:55:31,074 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:31,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,129 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 12 treesize of output 8 [2021-06-12 19:55:31,131 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:31,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,184 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 7 [2021-06-12 19:55:31,185 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:31,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,236 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 19:55:31,236 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:78 [2021-06-12 19:55:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:31,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901114932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:31,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:55:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908044455] [2021-06-12 19:55:31,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:31,337 INFO L87 Difference]: Start difference. First operand 466 states and 1406 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 19:55:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:31,627 INFO L93 Difference]: Finished difference Result 605 states and 1764 transitions. [2021-06-12 19:55:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:31,627 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 24 [2021-06-12 19:55:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:31,629 INFO L225 Difference]: With dead ends: 605 [2021-06-12 19:55:31,629 INFO L226 Difference]: Without dead ends: 586 [2021-06-12 19:55:31,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-12 19:55:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 460. [2021-06-12 19:55:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.997821350762527) internal successors, (1376), 459 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 19:55:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1376 transitions. [2021-06-12 19:55:31,635 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1376 transitions. Word has length 24 [2021-06-12 19:55:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:31,635 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1376 transitions. [2021-06-12 19:55:31,635 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 19:55:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1376 transitions. [2021-06-12 19:55:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:31,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:31,636 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:31,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 19:55:31,841 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1464730482, now seen corresponding path program 27 times [2021-06-12 19:55:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:31,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034965626] [2021-06-12 19:55:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:32,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034965626] [2021-06-12 19:55:32,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034965626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222819818] [2021-06-12 19:55:32,058 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 19:55:32,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:32,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:32,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:32,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:32,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:32,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:55:32,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 19:55:32,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,351 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 29 treesize of output 23 [2021-06-12 19:55:32,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,354 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 30 treesize of output 24 [2021-06-12 19:55:32,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,381 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 22 treesize of output 14 [2021-06-12 19:55:32,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:55:32,385 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:32,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:32,408 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 19:55:32,408 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:97, output treesize:27 [2021-06-12 19:55:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:32,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222819818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:32,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942484897] [2021-06-12 19:55:32,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:32,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:32,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:32,473 INFO L87 Difference]: Start difference. First operand 460 states and 1376 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:32,901 INFO L93 Difference]: Finished difference Result 536 states and 1575 transitions. [2021-06-12 19:55:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:32,903 INFO L225 Difference]: With dead ends: 536 [2021-06-12 19:55:32,903 INFO L226 Difference]: Without dead ends: 497 [2021-06-12 19:55:32,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 533.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-12 19:55:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 463. [2021-06-12 19:55:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.0) internal successors, (1386), 462 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1386 transitions. [2021-06-12 19:55:32,908 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1386 transitions. Word has length 24 [2021-06-12 19:55:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:32,908 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1386 transitions. [2021-06-12 19:55:32,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1386 transitions. [2021-06-12 19:55:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:32,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:32,909 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:33,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 19:55:33,125 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash 861906348, now seen corresponding path program 28 times [2021-06-12 19:55:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:33,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87701815] [2021-06-12 19:55:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:33,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:33,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87701815] [2021-06-12 19:55:33,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87701815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435905746] [2021-06-12 19:55:33,298 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 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 19:55:33,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:33,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:33,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,436 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 19 treesize of output 15 [2021-06-12 19:55:33,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:33,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:33,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,527 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 19:55:33,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,531 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 19 treesize of output 15 [2021-06-12 19:55:33,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:33,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:33,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:55:33,764 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 19:55:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,768 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 20 treesize of output 16 [2021-06-12 19:55:33,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,773 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 19:55:33,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,778 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 20 treesize of output 16 [2021-06-12 19:55:33,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,783 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 19:55:33,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,789 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 20 treesize of output 16 [2021-06-12 19:55:33,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,795 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 20 treesize of output 16 [2021-06-12 19:55:33,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,800 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 19:55:33,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,806 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 19:55:33,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,989 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-12 19:55:33,989 INFO L628 ElimStorePlain]: treesize reduction 181, result has 51.6 percent of original size [2021-06-12 19:55:33,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,993 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 11 treesize of output 7 [2021-06-12 19:55:33,995 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:33,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,998 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 13 treesize of output 9 [2021-06-12 19:55:33,999 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:34,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:34,074 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:425, output treesize:96 [2021-06-12 19:55:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:34,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435905746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:34,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:34,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434131686] [2021-06-12 19:55:34,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:34,210 INFO L87 Difference]: Start difference. First operand 463 states and 1386 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 19:55:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:34,771 INFO L93 Difference]: Finished difference Result 703 states and 2030 transitions. [2021-06-12 19:55:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:55:34,771 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 24 [2021-06-12 19:55:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:34,772 INFO L225 Difference]: With dead ends: 703 [2021-06-12 19:55:34,773 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 19:55:34,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:55:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 19:55:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 472. [2021-06-12 19:55:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.0276008492569004) internal successors, (1426), 471 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 19:55:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1426 transitions. [2021-06-12 19:55:34,779 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1426 transitions. Word has length 24 [2021-06-12 19:55:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:34,779 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1426 transitions. [2021-06-12 19:55:34,779 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 19:55:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1426 transitions. [2021-06-12 19:55:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:34,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:34,779 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:34,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 19:55:34,993 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -18367188, now seen corresponding path program 29 times [2021-06-12 19:55:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510749586] [2021-06-12 19:55:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:35,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:35,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510749586] [2021-06-12 19:55:35,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510749586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:35,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762870139] [2021-06-12 19:55:35,120 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 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 19:55:35,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,249 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 19:55:35,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,278 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 19:55:35,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:35,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:55:35,305 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 19:55:35,385 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 19:55:35,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,388 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 20 treesize of output 16 [2021-06-12 19:55:35,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,392 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 19:55:35,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,396 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 20 treesize of output 16 [2021-06-12 19:55:35,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,400 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 19 treesize of output 15 [2021-06-12 19:55:35,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,463 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 11 treesize of output 7 [2021-06-12 19:55:35,464 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:35,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,467 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 13 treesize of output 9 [2021-06-12 19:55:35,468 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,472 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 13 treesize of output 9 [2021-06-12 19:55:35,473 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:35,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,476 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 11 treesize of output 7 [2021-06-12 19:55:35,477 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:35,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:35,535 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 19:55:35,536 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-06-12 19:55:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:35,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762870139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:35,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:35,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:35,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645777392] [2021-06-12 19:55:35,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:35,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:35,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:35,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:35,642 INFO L87 Difference]: Start difference. First operand 472 states and 1426 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 19:55:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:36,277 INFO L93 Difference]: Finished difference Result 833 states and 2387 transitions. [2021-06-12 19:55:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:55:36,277 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 24 [2021-06-12 19:55:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:36,278 INFO L225 Difference]: With dead ends: 833 [2021-06-12 19:55:36,278 INFO L226 Difference]: Without dead ends: 737 [2021-06-12 19:55:36,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-12 19:55:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 465. [2021-06-12 19:55:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0129310344827585) internal successors, (1398), 464 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 19:55:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1398 transitions. [2021-06-12 19:55:36,285 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1398 transitions. Word has length 24 [2021-06-12 19:55:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:36,285 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1398 transitions. [2021-06-12 19:55:36,285 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 19:55:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1398 transitions. [2021-06-12 19:55:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:36,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:36,286 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:36,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 19:55:36,493 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2121799196, now seen corresponding path program 30 times [2021-06-12 19:55:36,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:36,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120243680] [2021-06-12 19:55:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:36,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:36,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120243680] [2021-06-12 19:55:36,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120243680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735127594] [2021-06-12 19:55:36,586 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 19:55:36,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:36,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:36,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:36,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:36,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,655 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 19:55:36,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,658 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 18 treesize of output 14 [2021-06-12 19:55:36,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:36,680 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 19:55:36,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-12 19:55:36,797 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 28 treesize of output 22 [2021-06-12 19:55:36,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,799 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 28 treesize of output 22 [2021-06-12 19:55:36,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:36,817 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:36,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:36,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-12 19:55:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:36,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735127594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:36,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:55:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100685758] [2021-06-12 19:55:36,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:36,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:36,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:36,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:36,866 INFO L87 Difference]: Start difference. First operand 465 states and 1398 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 19:55:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:37,179 INFO L93 Difference]: Finished difference Result 835 states and 2484 transitions. [2021-06-12 19:55:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:37,180 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 24 [2021-06-12 19:55:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:37,184 INFO L225 Difference]: With dead ends: 835 [2021-06-12 19:55:37,184 INFO L226 Difference]: Without dead ends: 804 [2021-06-12 19:55:37,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-12 19:55:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 493. [2021-06-12 19:55:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.016260162601626) internal successors, (1484), 492 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 19:55:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1484 transitions. [2021-06-12 19:55:37,191 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1484 transitions. Word has length 24 [2021-06-12 19:55:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:37,191 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1484 transitions. [2021-06-12 19:55:37,191 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 19:55:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1484 transitions. [2021-06-12 19:55:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:37,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:37,192 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:37,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:37,407 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash 19538978, now seen corresponding path program 31 times [2021-06-12 19:55:37,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:37,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050734757] [2021-06-12 19:55:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:37,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050734757] [2021-06-12 19:55:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050734757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763492242] [2021-06-12 19:55:37,508 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 19:55:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,582 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 17 treesize of output 13 [2021-06-12 19:55:37,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,590 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 17 treesize of output 13 [2021-06-12 19:55:37,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,594 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 18 treesize of output 14 [2021-06-12 19:55:37,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:37,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:37,633 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:37,832 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:55:37,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:37,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,844 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 7 [2021-06-12 19:55:37,845 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:37,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,851 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 19:55:37,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-12 19:55:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:37,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763492242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:37,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:37,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567380681] [2021-06-12 19:55:37,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:37,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:37,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:37,898 INFO L87 Difference]: Start difference. First operand 493 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:38,606 INFO L93 Difference]: Finished difference Result 851 states and 2486 transitions. [2021-06-12 19:55:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:38,608 INFO L225 Difference]: With dead ends: 851 [2021-06-12 19:55:38,608 INFO L226 Difference]: Without dead ends: 793 [2021-06-12 19:55:38,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-12 19:55:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 508. [2021-06-12 19:55:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.021696252465483) internal successors, (1532), 507 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 19:55:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1532 transitions. [2021-06-12 19:55:38,615 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1532 transitions. Word has length 24 [2021-06-12 19:55:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:38,615 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1532 transitions. [2021-06-12 19:55:38,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1532 transitions. [2021-06-12 19:55:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:38,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:38,616 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:38,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 19:55:38,816 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:38,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1718432838, now seen corresponding path program 32 times [2021-06-12 19:55:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:38,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620024262] [2021-06-12 19:55:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:38,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:38,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620024262] [2021-06-12 19:55:38,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620024262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182130282] [2021-06-12 19:55:38,991 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 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 19:55:39,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:39,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:39,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,074 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 18 treesize of output 14 [2021-06-12 19:55:39,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,077 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 17 treesize of output 13 [2021-06-12 19:55:39,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,080 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 18 treesize of output 14 [2021-06-12 19:55:39,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:39,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:39,286 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_113], 1=[o_4, v_prenex_114]} [2021-06-12 19:55:39,289 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 20 treesize of output 16 [2021-06-12 19:55:39,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,293 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 20 treesize of output 16 [2021-06-12 19:55:39,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,364 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.5 percent of original size [2021-06-12 19:55:39,366 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 19 treesize of output 15 [2021-06-12 19:55:39,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,399 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 12 treesize of output 8 [2021-06-12 19:55:39,400 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:39,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,432 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 7 [2021-06-12 19:55:39,433 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:39,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:39,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:39,462 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-06-12 19:55:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:39,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182130282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:39,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:39,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078814609] [2021-06-12 19:55:39,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:39,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:39,539 INFO L87 Difference]: Start difference. First operand 508 states and 1532 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:40,287 INFO L93 Difference]: Finished difference Result 901 states and 2528 transitions. [2021-06-12 19:55:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:40,289 INFO L225 Difference]: With dead ends: 901 [2021-06-12 19:55:40,289 INFO L226 Difference]: Without dead ends: 825 [2021-06-12 19:55:40,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 851.6ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-12 19:55:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 526. [2021-06-12 19:55:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.026666666666667) internal successors, (1589), 525 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 19:55:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1589 transitions. [2021-06-12 19:55:40,296 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1589 transitions. Word has length 24 [2021-06-12 19:55:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:40,296 INFO L482 AbstractCegarLoop]: Abstraction has 526 states and 1589 transitions. [2021-06-12 19:55:40,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1589 transitions. [2021-06-12 19:55:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:40,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:40,297 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:40,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 19:55:40,514 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1418044830, now seen corresponding path program 33 times [2021-06-12 19:55:40,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:40,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193489197] [2021-06-12 19:55:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:40,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193489197] [2021-06-12 19:55:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193489197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406351803] [2021-06-12 19:55:40,656 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 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 19:55:40,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:40,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,727 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 18 treesize of output 14 [2021-06-12 19:55:40,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,730 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 17 treesize of output 13 [2021-06-12 19:55:40,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,740 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 18 treesize of output 14 [2021-06-12 19:55:40,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,744 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 19:55:40,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:40,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:40,924 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 37 treesize of output 29 [2021-06-12 19:55:40,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,927 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 37 treesize of output 29 [2021-06-12 19:55:40,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,941 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:40,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:40,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-06-12 19:55:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:40,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406351803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:40,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:55:40,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263163719] [2021-06-12 19:55:40,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:40,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:40,971 INFO L87 Difference]: Start difference. First operand 526 states and 1589 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 19:55:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:41,354 INFO L93 Difference]: Finished difference Result 1263 states and 3571 transitions. [2021-06-12 19:55:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:55:41,354 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 24 [2021-06-12 19:55:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:41,356 INFO L225 Difference]: With dead ends: 1263 [2021-06-12 19:55:41,356 INFO L226 Difference]: Without dead ends: 1205 [2021-06-12 19:55:41,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-12 19:55:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 533. [2021-06-12 19:55:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 3.039473684210526) internal successors, (1617), 532 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1617 transitions. [2021-06-12 19:55:41,365 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1617 transitions. Word has length 24 [2021-06-12 19:55:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:41,365 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1617 transitions. [2021-06-12 19:55:41,365 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 19:55:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1617 transitions. [2021-06-12 19:55:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:41,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:41,366 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:41,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:41,572 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1313623516, now seen corresponding path program 34 times [2021-06-12 19:55:41,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:41,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368178710] [2021-06-12 19:55:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:41,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368178710] [2021-06-12 19:55:41,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368178710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440501676] [2021-06-12 19:55:41,719 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 19:55:41,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:41,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:41,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:41,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,790 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 18 treesize of output 14 [2021-06-12 19:55:41,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,794 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 18 treesize of output 14 [2021-06-12 19:55:41,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:41,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,797 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 17 treesize of output 13 [2021-06-12 19:55:41,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:41,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:41,800 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 17 treesize of output 13 [2021-06-12 19:55:41,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:41,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:41,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:41,837 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:55:42,046 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:55:42,048 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 19 treesize of output 15 [2021-06-12 19:55:42,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,056 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 7 [2021-06-12 19:55:42,057 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:42,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,063 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 19:55:42,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-12 19:55:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:42,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440501676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:42,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:42,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472398019] [2021-06-12 19:55:42,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:42,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:42,095 INFO L87 Difference]: Start difference. First operand 533 states and 1617 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:42,690 INFO L93 Difference]: Finished difference Result 1221 states and 3544 transitions. [2021-06-12 19:55:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:42,692 INFO L225 Difference]: With dead ends: 1221 [2021-06-12 19:55:42,692 INFO L226 Difference]: Without dead ends: 1117 [2021-06-12 19:55:42,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-12 19:55:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 559. [2021-06-12 19:55:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.0842293906810037) internal successors, (1721), 558 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1721 transitions. [2021-06-12 19:55:42,701 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1721 transitions. Word has length 24 [2021-06-12 19:55:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:42,701 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1721 transitions. [2021-06-12 19:55:42,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1721 transitions. [2021-06-12 19:55:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:42,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:42,713 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:42,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-12 19:55:42,917 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1225105820, now seen corresponding path program 35 times [2021-06-12 19:55:42,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:42,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974267697] [2021-06-12 19:55:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:43,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974267697] [2021-06-12 19:55:43,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974267697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357954683] [2021-06-12 19:55:43,125 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 19:55:43,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:43,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,219 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 18 treesize of output 14 [2021-06-12 19:55:43,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,223 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 17 treesize of output 13 [2021-06-12 19:55:43,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,227 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 17 treesize of output 13 [2021-06-12 19:55:43,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,231 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 18 treesize of output 14 [2021-06-12 19:55:43,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:43,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:55:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:43,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,629 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 12 treesize of output 8 [2021-06-12 19:55:43,630 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:43,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,660 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 19:55:43,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,686 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 11 treesize of output 7 [2021-06-12 19:55:43,687 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:43,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:43,718 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 19:55:43,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:75, output treesize:27 [2021-06-12 19:55:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:43,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357954683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:43,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:43,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:43,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323804667] [2021-06-12 19:55:43,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:43,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:43,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:43,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:43,785 INFO L87 Difference]: Start difference. First operand 559 states and 1721 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:44,629 INFO L93 Difference]: Finished difference Result 1049 states and 3071 transitions. [2021-06-12 19:55:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:44,632 INFO L225 Difference]: With dead ends: 1049 [2021-06-12 19:55:44,632 INFO L226 Difference]: Without dead ends: 983 [2021-06-12 19:55:44,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 862.6ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-12 19:55:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 550. [2021-06-12 19:55:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.09471766848816) internal successors, (1699), 549 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1699 transitions. [2021-06-12 19:55:44,639 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1699 transitions. Word has length 24 [2021-06-12 19:55:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:44,639 INFO L482 AbstractCegarLoop]: Abstraction has 550 states and 1699 transitions. [2021-06-12 19:55:44,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1699 transitions. [2021-06-12 19:55:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:44,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:44,640 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:44,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:44,853 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash 731352034, now seen corresponding path program 36 times [2021-06-12 19:55:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159560490] [2021-06-12 19:55:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:45,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:45,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159560490] [2021-06-12 19:55:45,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159560490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573907225] [2021-06-12 19:55:45,036 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 19:55:45,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:45,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:45,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:45,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,129 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 18 treesize of output 14 [2021-06-12 19:55:45,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,132 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 18 treesize of output 14 [2021-06-12 19:55:45,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,136 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 19:55:45,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:45,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:45,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:45,198 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:55:45,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,476 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 27 treesize of output 21 [2021-06-12 19:55:45,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,479 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 27 treesize of output 21 [2021-06-12 19:55:45,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,505 INFO L628 ElimStorePlain]: treesize reduction 44, result has 39.7 percent of original size [2021-06-12 19:55:45,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,508 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 11 treesize of output 7 [2021-06-12 19:55:45,509 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:45,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:45,518 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 19:55:45,518 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-06-12 19:55:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:45,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573907225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:45,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:45,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486936569] [2021-06-12 19:55:45,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:45,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:45,572 INFO L87 Difference]: Start difference. First operand 550 states and 1699 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:46,199 INFO L93 Difference]: Finished difference Result 1002 states and 2950 transitions. [2021-06-12 19:55:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:46,201 INFO L225 Difference]: With dead ends: 1002 [2021-06-12 19:55:46,201 INFO L226 Difference]: Without dead ends: 888 [2021-06-12 19:55:46,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-12 19:55:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 551. [2021-06-12 19:55:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.0945454545454547) internal successors, (1702), 550 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1702 transitions. [2021-06-12 19:55:46,208 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1702 transitions. Word has length 24 [2021-06-12 19:55:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:46,209 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1702 transitions. [2021-06-12 19:55:46,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1702 transitions. [2021-06-12 19:55:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:46,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:46,209 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:46,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:46,425 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2045366020, now seen corresponding path program 37 times [2021-06-12 19:55:46,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036884309] [2021-06-12 19:55:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:46,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:46,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036884309] [2021-06-12 19:55:46,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036884309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437188661] [2021-06-12 19:55:46,591 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 19:55:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,690 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 17 treesize of output 13 [2021-06-12 19:55:46,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,693 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 17 treesize of output 13 [2021-06-12 19:55:46,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,697 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 18 treesize of output 14 [2021-06-12 19:55:46,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,700 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 18 treesize of output 14 [2021-06-12 19:55:46,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:46,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:46,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:55:46,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,949 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 19 treesize of output 15 [2021-06-12 19:55:46,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,010 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 7 [2021-06-12 19:55:47,011 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:47,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,074 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 19:55:47,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,132 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 11 treesize of output 7 [2021-06-12 19:55:47,133 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:47,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,190 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 20 treesize of output 16 [2021-06-12 19:55:47,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,244 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 12 treesize of output 8 [2021-06-12 19:55:47,245 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:47,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,296 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 20 treesize of output 16 [2021-06-12 19:55:47,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,354 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 12 treesize of output 8 [2021-06-12 19:55:47,356 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:47,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,401 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 19:55:47,402 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-06-12 19:55:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437188661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:47,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107530453] [2021-06-12 19:55:47,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:47,527 INFO L87 Difference]: Start difference. First operand 551 states and 1702 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:48,352 INFO L93 Difference]: Finished difference Result 1005 states and 2906 transitions. [2021-06-12 19:55:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:48,354 INFO L225 Difference]: With dead ends: 1005 [2021-06-12 19:55:48,354 INFO L226 Difference]: Without dead ends: 931 [2021-06-12 19:55:48,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 934.9ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-06-12 19:55:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 563. [2021-06-12 19:55:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.108540925266904) internal successors, (1747), 562 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1747 transitions. [2021-06-12 19:55:48,363 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1747 transitions. Word has length 24 [2021-06-12 19:55:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:48,363 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1747 transitions. [2021-06-12 19:55:48,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1747 transitions. [2021-06-12 19:55:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:48,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:48,364 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:48,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 19:55:48,573 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash -125536922, now seen corresponding path program 38 times [2021-06-12 19:55:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482264760] [2021-06-12 19:55:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:48,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:48,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482264760] [2021-06-12 19:55:48,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482264760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:48,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634798530] [2021-06-12 19:55:48,764 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 19:55:48,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:48,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:48,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,873 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 17 treesize of output 13 [2021-06-12 19:55:48,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,876 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 18 treesize of output 14 [2021-06-12 19:55:48,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,897 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 2 xjuncts. [2021-06-12 19:55:48,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 19:55:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,005 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 20 treesize of output 16 [2021-06-12 19:55:49,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,029 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 19:55:49,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,053 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 8 [2021-06-12 19:55:49,055 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:49,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,077 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 8 [2021-06-12 19:55:49,078 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:49,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:49,097 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 19:55:49,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:25 [2021-06-12 19:55:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:55:49,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634798530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:49,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:49,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:49,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028752983] [2021-06-12 19:55:49,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:49,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:49,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:49,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:49,198 INFO L87 Difference]: Start difference. First operand 563 states and 1747 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:50,222 INFO L93 Difference]: Finished difference Result 1069 states and 3125 transitions. [2021-06-12 19:55:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:50,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:55:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:50,224 INFO L225 Difference]: With dead ends: 1069 [2021-06-12 19:55:50,224 INFO L226 Difference]: Without dead ends: 1031 [2021-06-12 19:55:50,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-12 19:55:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 568. [2021-06-12 19:55:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.123456790123457) internal successors, (1771), 567 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1771 transitions. [2021-06-12 19:55:50,233 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1771 transitions. Word has length 24 [2021-06-12 19:55:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:50,233 INFO L482 AbstractCegarLoop]: Abstraction has 568 states and 1771 transitions. [2021-06-12 19:55:50,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:55:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1771 transitions. [2021-06-12 19:55:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:50,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:50,233 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:50,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:50,453 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1253735250, now seen corresponding path program 39 times [2021-06-12 19:55:50,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:50,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322009159] [2021-06-12 19:55:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:50,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322009159] [2021-06-12 19:55:50,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322009159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996848411] [2021-06-12 19:55:50,585 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 19:55:50,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:50,658 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 24 treesize of output 18 [2021-06-12 19:55:50,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,660 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 24 treesize of output 18 [2021-06-12 19:55:50,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:50,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:50,676 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 19:55:50,742 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 37 treesize of output 29 [2021-06-12 19:55:50,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-12 19:55:50,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:50,755 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:50,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:50,756 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-06-12 19:55:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:50,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996848411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:50,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:55:50,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242949866] [2021-06-12 19:55:50,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:50,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:50,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:50,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:50,782 INFO L87 Difference]: Start difference. First operand 568 states and 1771 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 19:55:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:51,004 INFO L93 Difference]: Finished difference Result 833 states and 2483 transitions. [2021-06-12 19:55:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:51,004 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 24 [2021-06-12 19:55:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:51,006 INFO L225 Difference]: With dead ends: 833 [2021-06-12 19:55:51,006 INFO L226 Difference]: Without dead ends: 802 [2021-06-12 19:55:51,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-12 19:55:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 566. [2021-06-12 19:55:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 3.129203539823009) internal successors, (1768), 565 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1768 transitions. [2021-06-12 19:55:51,013 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1768 transitions. Word has length 24 [2021-06-12 19:55:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:51,013 INFO L482 AbstractCegarLoop]: Abstraction has 566 states and 1768 transitions. [2021-06-12 19:55:51,013 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 19:55:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1768 transitions. [2021-06-12 19:55:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:51,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:51,014 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:51,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-12 19:55:51,229 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1623574386, now seen corresponding path program 40 times [2021-06-12 19:55:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:51,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581802310] [2021-06-12 19:55:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:51,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:51,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581802310] [2021-06-12 19:55:51,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581802310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531319807] [2021-06-12 19:55:51,383 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) [2021-06-12 19:55:51,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:51,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:51,463 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 24 treesize of output 18 [2021-06-12 19:55:51,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,465 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 24 treesize of output 18 [2021-06-12 19:55:51,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:51,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 19:55:51,563 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 28 treesize of output 22 [2021-06-12 19:55:51,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,566 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 28 treesize of output 22 [2021-06-12 19:55:51,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,586 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:51,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:51,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-12 19:55:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531319807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:51,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947006550] [2021-06-12 19:55:51,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:51,647 INFO L87 Difference]: Start difference. First operand 566 states and 1768 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 19:55:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:51,926 INFO L93 Difference]: Finished difference Result 831 states and 2471 transitions. [2021-06-12 19:55:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:51,926 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 24 [2021-06-12 19:55:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:51,928 INFO L225 Difference]: With dead ends: 831 [2021-06-12 19:55:51,928 INFO L226 Difference]: Without dead ends: 781 [2021-06-12 19:55:51,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-12 19:55:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 520. [2021-06-12 19:55:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.071290944123314) internal successors, (1594), 519 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 19:55:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1594 transitions. [2021-06-12 19:55:51,934 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1594 transitions. Word has length 24 [2021-06-12 19:55:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:51,934 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1594 transitions. [2021-06-12 19:55:51,935 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 19:55:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1594 transitions. [2021-06-12 19:55:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:51,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:51,935 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:52,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:52,137 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash 242494626, now seen corresponding path program 41 times [2021-06-12 19:55:52,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092624175] [2021-06-12 19:55:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:52,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092624175] [2021-06-12 19:55:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092624175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133819718] [2021-06-12 19:55:52,270 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 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 19:55:52,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:52,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:52,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:52,353 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 24 treesize of output 18 [2021-06-12 19:55:52,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:52,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:27 [2021-06-12 19:55:52,414 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 28 treesize of output 22 [2021-06-12 19:55:52,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,416 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 28 treesize of output 22 [2021-06-12 19:55:52,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:52,430 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:52,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:52,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-12 19:55:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:52,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133819718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:52,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:55:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651663003] [2021-06-12 19:55:52,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:52,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:52,476 INFO L87 Difference]: Start difference. First operand 520 states and 1594 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 19:55:52,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:52,744 INFO L93 Difference]: Finished difference Result 652 states and 1970 transitions. [2021-06-12 19:55:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:52,744 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 24 [2021-06-12 19:55:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:52,745 INFO L225 Difference]: With dead ends: 652 [2021-06-12 19:55:52,745 INFO L226 Difference]: Without dead ends: 593 [2021-06-12 19:55:52,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-12 19:55:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 534. [2021-06-12 19:55:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.069418386491557) internal successors, (1636), 533 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1636 transitions. [2021-06-12 19:55:52,751 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1636 transitions. Word has length 24 [2021-06-12 19:55:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:52,751 INFO L482 AbstractCegarLoop]: Abstraction has 534 states and 1636 transitions. [2021-06-12 19:55:52,752 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 19:55:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1636 transitions. [2021-06-12 19:55:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:52,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:52,752 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:52,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-12 19:55:52,969 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash -22923196, now seen corresponding path program 42 times [2021-06-12 19:55:52,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:52,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396777886] [2021-06-12 19:55:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:53,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:53,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396777886] [2021-06-12 19:55:53,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396777886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366566188] [2021-06-12 19:55:53,155 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 19:55:53,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:53,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:53,243 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 24 treesize of output 18 [2021-06-12 19:55:53,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,245 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 24 treesize of output 18 [2021-06-12 19:55:53,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:53,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 19:55:53,308 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 28 treesize of output 22 [2021-06-12 19:55:53,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,333 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 28 treesize of output 22 [2021-06-12 19:55:53,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,350 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:53,350 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-06-12 19:55:53,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:53,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:55:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:53,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366566188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:53,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:55:53,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239949944] [2021-06-12 19:55:53,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:53,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:53,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:53,421 INFO L87 Difference]: Start difference. First operand 534 states and 1636 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 19:55:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:53,777 INFO L93 Difference]: Finished difference Result 738 states and 2185 transitions. [2021-06-12 19:55:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:53,778 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 24 [2021-06-12 19:55:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:53,779 INFO L225 Difference]: With dead ends: 738 [2021-06-12 19:55:53,779 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 19:55:53,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 19:55:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 527. [2021-06-12 19:55:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.070342205323194) internal successors, (1615), 526 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 19:55:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1615 transitions. [2021-06-12 19:55:53,785 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1615 transitions. Word has length 24 [2021-06-12 19:55:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:53,785 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1615 transitions. [2021-06-12 19:55:53,785 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 19:55:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1615 transitions. [2021-06-12 19:55:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:53,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:53,786 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:53,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:53,986 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:53,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2123247564, now seen corresponding path program 43 times [2021-06-12 19:55:53,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:53,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117900672] [2021-06-12 19:55:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:54,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117900672] [2021-06-12 19:55:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117900672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334138762] [2021-06-12 19:55:54,164 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 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 19:55:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:54,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:54,244 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 24 treesize of output 18 [2021-06-12 19:55:54,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,246 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 24 treesize of output 18 [2021-06-12 19:55:54,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:54,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:55:54,309 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 28 treesize of output 22 [2021-06-12 19:55:54,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,312 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 28 treesize of output 22 [2021-06-12 19:55:54,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,358 INFO L628 ElimStorePlain]: treesize reduction 89, result has 34.1 percent of original size [2021-06-12 19:55:54,358 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:55:54,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:55:54,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:54,377 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-06-12 19:55:54,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:54,378 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:37 [2021-06-12 19:55:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:54,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334138762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:54,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:55:54,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223769348] [2021-06-12 19:55:54,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:54,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:54,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:54,448 INFO L87 Difference]: Start difference. First operand 527 states and 1615 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 19:55:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:54,829 INFO L93 Difference]: Finished difference Result 805 states and 2406 transitions. [2021-06-12 19:55:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:55:54,829 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 24 [2021-06-12 19:55:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:54,830 INFO L225 Difference]: With dead ends: 805 [2021-06-12 19:55:54,830 INFO L226 Difference]: Without dead ends: 714 [2021-06-12 19:55:54,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-12 19:55:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 556. [2021-06-12 19:55:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.0648648648648646) internal successors, (1701), 555 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1701 transitions. [2021-06-12 19:55:54,841 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1701 transitions. Word has length 24 [2021-06-12 19:55:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:54,842 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1701 transitions. [2021-06-12 19:55:54,842 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 19:55:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1701 transitions. [2021-06-12 19:55:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:54,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:54,843 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:55,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 19:55:55,061 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1830085998, now seen corresponding path program 44 times [2021-06-12 19:55:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:55,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604762935] [2021-06-12 19:55:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:55,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:55,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604762935] [2021-06-12 19:55:55,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604762935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311786176] [2021-06-12 19:55:55,226 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 19:55:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:55,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,354 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 19:55:55,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,358 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 18 treesize of output 14 [2021-06-12 19:55:55,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:55,382 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 2 xjuncts. [2021-06-12 19:55:55,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-12 19:55:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,565 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 19 treesize of output 15 [2021-06-12 19:55:55,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,567 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 19:55:55,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:55,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,592 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 7 [2021-06-12 19:55:55,593 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,596 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 7 [2021-06-12 19:55:55,597 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:55,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:55,616 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 19:55:55,617 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:25 [2021-06-12 19:55:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:55,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311786176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:55,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:55,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061653485] [2021-06-12 19:55:55,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:55,660 INFO L87 Difference]: Start difference. First operand 556 states and 1701 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 19:55:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:56,378 INFO L93 Difference]: Finished difference Result 760 states and 2287 transitions. [2021-06-12 19:55:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:56,378 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 24 [2021-06-12 19:55:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:56,379 INFO L225 Difference]: With dead ends: 760 [2021-06-12 19:55:56,379 INFO L226 Difference]: Without dead ends: 689 [2021-06-12 19:55:56,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 672.5ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-12 19:55:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 581. [2021-06-12 19:55:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.0689655172413794) internal successors, (1780), 580 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1780 transitions. [2021-06-12 19:55:56,385 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1780 transitions. Word has length 24 [2021-06-12 19:55:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:56,386 INFO L482 AbstractCegarLoop]: Abstraction has 581 states and 1780 transitions. [2021-06-12 19:55:56,386 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 19:55:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1780 transitions. [2021-06-12 19:55:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:56,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:56,386 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:56,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 19:55:56,605 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash 92114182, now seen corresponding path program 45 times [2021-06-12 19:55:56,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:56,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208770448] [2021-06-12 19:55:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:56,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208770448] [2021-06-12 19:55:56,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208770448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282625269] [2021-06-12 19:55:56,787 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 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 19:55:56,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:56,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:55:56,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,926 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 19:55:56,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,951 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 2 xjuncts. [2021-06-12 19:55:56,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-12 19:55:57,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,096 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 20 treesize of output 16 [2021-06-12 19:55:57,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,099 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 20 treesize of output 16 [2021-06-12 19:55:57,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,163 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 19 treesize of output 15 [2021-06-12 19:55:57,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,166 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 19 treesize of output 15 [2021-06-12 19:55:57,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,216 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 8 [2021-06-12 19:55:57,218 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,220 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 12 treesize of output 8 [2021-06-12 19:55:57,221 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:57,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,268 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 12 treesize of output 8 [2021-06-12 19:55:57,269 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,272 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 12 treesize of output 8 [2021-06-12 19:55:57,273 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:57,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:57,316 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:153, output treesize:57 [2021-06-12 19:55:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:57,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282625269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:57,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746570190] [2021-06-12 19:55:57,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:57,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:57,412 INFO L87 Difference]: Start difference. First operand 581 states and 1780 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 19:55:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:58,040 INFO L93 Difference]: Finished difference Result 841 states and 2452 transitions. [2021-06-12 19:55:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:58,040 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 24 [2021-06-12 19:55:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:58,041 INFO L225 Difference]: With dead ends: 841 [2021-06-12 19:55:58,041 INFO L226 Difference]: Without dead ends: 753 [2021-06-12 19:55:58,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:55:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-12 19:55:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 577. [2021-06-12 19:55:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.0902777777777777) internal successors, (1780), 576 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1780 transitions. [2021-06-12 19:55:58,047 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1780 transitions. Word has length 24 [2021-06-12 19:55:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:58,047 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1780 transitions. [2021-06-12 19:55:58,047 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 19:55:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1780 transitions. [2021-06-12 19:55:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:58,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:58,048 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:58,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-12 19:55:58,253 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:58,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1722226322, now seen corresponding path program 46 times [2021-06-12 19:55:58,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:58,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906292879] [2021-06-12 19:55:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:58,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906292879] [2021-06-12 19:55:58,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906292879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196320825] [2021-06-12 19:55:58,390 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 19:55:58,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:58,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,511 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 17 treesize of output 13 [2021-06-12 19:55:58,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,515 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 19:55:58,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,518 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 18 treesize of output 14 [2021-06-12 19:55:58,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,522 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 19:55:58,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:55:58,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 19:55:58,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:55:58,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,842 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 7 [2021-06-12 19:55:58,843 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:58,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,869 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 19:55:58,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:55:58,895 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:55:58,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,916 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 19:55:58,916 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:31 [2021-06-12 19:55:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:58,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196320825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:58,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:55:58,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355837357] [2021-06-12 19:55:58,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:58,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:58,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:58,964 INFO L87 Difference]: Start difference. First operand 577 states and 1780 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 19:55:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:59,411 INFO L93 Difference]: Finished difference Result 877 states and 2594 transitions. [2021-06-12 19:55:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:59,411 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 24 [2021-06-12 19:55:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:59,412 INFO L225 Difference]: With dead ends: 877 [2021-06-12 19:55:59,412 INFO L226 Difference]: Without dead ends: 819 [2021-06-12 19:55:59,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-12 19:55:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 580. [2021-06-12 19:55:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.0967184801381693) internal successors, (1793), 579 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1793 transitions. [2021-06-12 19:55:59,418 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1793 transitions. Word has length 24 [2021-06-12 19:55:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:59,419 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1793 transitions. [2021-06-12 19:55:59,419 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 19:55:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1793 transitions. [2021-06-12 19:55:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:55:59,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:59,419 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:59,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 19:55:59,620 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:59,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1896118492, now seen corresponding path program 47 times [2021-06-12 19:55:59,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:59,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599049432] [2021-06-12 19:55:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:55:59,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:59,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599049432] [2021-06-12 19:55:59,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599049432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:59,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997303469] [2021-06-12 19:55:59,853 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 19:55:59,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:59,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,976 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 17 treesize of output 13 [2021-06-12 19:55:59,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,979 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 18 treesize of output 14 [2021-06-12 19:55:59,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,983 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 17 treesize of output 13 [2021-06-12 19:55:59,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,987 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 18 treesize of output 14 [2021-06-12 19:55:59,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:00,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:56:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,176 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 20 treesize of output 16 [2021-06-12 19:56:00,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,244 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 19:56:00,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,308 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 12 treesize of output 8 [2021-06-12 19:56:00,309 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:00,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,375 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 20 treesize of output 16 [2021-06-12 19:56:00,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,435 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 12 treesize of output 8 [2021-06-12 19:56:00,436 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:00,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,494 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 19 treesize of output 15 [2021-06-12 19:56:00,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,550 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 7 [2021-06-12 19:56:00,551 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:00,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,605 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 12 treesize of output 8 [2021-06-12 19:56:00,607 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:00,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,657 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 19:56:00,657 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:69 [2021-06-12 19:56:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:00,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997303469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:00,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:00,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311259844] [2021-06-12 19:56:00,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:00,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:00,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:00,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:00,772 INFO L87 Difference]: Start difference. First operand 580 states and 1793 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:01,302 INFO L93 Difference]: Finished difference Result 915 states and 2681 transitions. [2021-06-12 19:56:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:01,303 INFO L225 Difference]: With dead ends: 915 [2021-06-12 19:56:01,303 INFO L226 Difference]: Without dead ends: 841 [2021-06-12 19:56:01,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-12 19:56:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 585. [2021-06-12 19:56:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.11472602739726) internal successors, (1819), 584 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1819 transitions. [2021-06-12 19:56:01,310 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1819 transitions. Word has length 24 [2021-06-12 19:56:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:01,310 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1819 transitions. [2021-06-12 19:56:01,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1819 transitions. [2021-06-12 19:56:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:01,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:01,311 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:01,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:01,512 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:01,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1518575268, now seen corresponding path program 48 times [2021-06-12 19:56:01,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:01,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014065238] [2021-06-12 19:56:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:01,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:01,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014065238] [2021-06-12 19:56:01,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014065238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338323479] [2021-06-12 19:56:01,731 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 19:56:01,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:56:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,855 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 18 treesize of output 14 [2021-06-12 19:56:01,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,858 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 17 treesize of output 13 [2021-06-12 19:56:01,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:01,882 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 2 xjuncts. [2021-06-12 19:56:01,882 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-12 19:56:01,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,946 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 19 treesize of output 15 [2021-06-12 19:56:01,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,949 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 19 treesize of output 15 [2021-06-12 19:56:01,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,015 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 20 treesize of output 16 [2021-06-12 19:56:02,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,018 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 20 treesize of output 16 [2021-06-12 19:56:02,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,077 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 11 treesize of output 7 [2021-06-12 19:56:02,078 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:02,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,081 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 7 [2021-06-12 19:56:02,082 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:02,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,143 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 12 treesize of output 8 [2021-06-12 19:56:02,144 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:02,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:02,148 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:02,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:02,198 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:69 [2021-06-12 19:56:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338323479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:02,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979298637] [2021-06-12 19:56:02,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:02,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:02,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:02,325 INFO L87 Difference]: Start difference. First operand 585 states and 1819 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:02,793 INFO L93 Difference]: Finished difference Result 967 states and 2849 transitions. [2021-06-12 19:56:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:02,795 INFO L225 Difference]: With dead ends: 967 [2021-06-12 19:56:02,795 INFO L226 Difference]: Without dead ends: 910 [2021-06-12 19:56:02,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-12 19:56:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 585. [2021-06-12 19:56:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.1164383561643834) internal successors, (1820), 584 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1820 transitions. [2021-06-12 19:56:02,802 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1820 transitions. Word has length 24 [2021-06-12 19:56:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:02,802 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1820 transitions. [2021-06-12 19:56:02,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1820 transitions. [2021-06-12 19:56:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:02,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:02,803 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:03,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,008 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1714438946, now seen corresponding path program 49 times [2021-06-12 19:56:03,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:03,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190942538] [2021-06-12 19:56:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:03,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:03,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190942538] [2021-06-12 19:56:03,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190942538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232352025] [2021-06-12 19:56:03,152 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 19:56:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:03,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:03,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,276 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 17 treesize of output 13 [2021-06-12 19:56:03,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:03,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,307 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 19:56:03,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-06-12 19:56:03,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,464 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 27 treesize of output 21 [2021-06-12 19:56:03,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,474 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 22 treesize of output 14 [2021-06-12 19:56:03,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,481 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 19:56:03,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:11 [2021-06-12 19:56:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:03,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232352025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:03,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:03,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994796345] [2021-06-12 19:56:03,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:03,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:03,514 INFO L87 Difference]: Start difference. First operand 585 states and 1820 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:03,817 INFO L93 Difference]: Finished difference Result 739 states and 2262 transitions. [2021-06-12 19:56:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:56:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:03,818 INFO L225 Difference]: With dead ends: 739 [2021-06-12 19:56:03,818 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 19:56:03,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 19:56:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 583. [2021-06-12 19:56:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1099656357388317) internal successors, (1810), 582 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1810 transitions. [2021-06-12 19:56:03,824 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1810 transitions. Word has length 24 [2021-06-12 19:56:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:03,824 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1810 transitions. [2021-06-12 19:56:03,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1810 transitions. [2021-06-12 19:56:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:03,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:03,825 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:04,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 19:56:04,025 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1454999516, now seen corresponding path program 50 times [2021-06-12 19:56:04,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:04,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476894752] [2021-06-12 19:56:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:04,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:04,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476894752] [2021-06-12 19:56:04,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476894752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989004646] [2021-06-12 19:56:04,197 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 19:56:04,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:04,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:04,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,345 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 17 treesize of output 13 [2021-06-12 19:56:04,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,356 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 19:56:04,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2021-06-12 19:56:04,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,386 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 19 treesize of output 15 [2021-06-12 19:56:04,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:04,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,420 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 7 [2021-06-12 19:56:04,421 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:04,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,424 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 11 treesize of output 7 [2021-06-12 19:56:04,425 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:04,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,448 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 19:56:04,448 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-12 19:56:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:04,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989004646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:04,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:04,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999252294] [2021-06-12 19:56:04,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:04,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:04,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:04,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:04,520 INFO L87 Difference]: Start difference. First operand 583 states and 1810 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:04,905 INFO L93 Difference]: Finished difference Result 786 states and 2399 transitions. [2021-06-12 19:56:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:56:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:04,906 INFO L225 Difference]: With dead ends: 786 [2021-06-12 19:56:04,906 INFO L226 Difference]: Without dead ends: 745 [2021-06-12 19:56:04,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-12 19:56:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 601. [2021-06-12 19:56:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.0933333333333333) internal successors, (1856), 600 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1856 transitions. [2021-06-12 19:56:04,913 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1856 transitions. Word has length 24 [2021-06-12 19:56:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:04,913 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 1856 transitions. [2021-06-12 19:56:04,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1856 transitions. [2021-06-12 19:56:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:04,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:04,914 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:05,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:05,115 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1392763898, now seen corresponding path program 51 times [2021-06-12 19:56:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:05,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884946495] [2021-06-12 19:56:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:05,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:05,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884946495] [2021-06-12 19:56:05,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884946495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991275917] [2021-06-12 19:56:05,282 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 19:56:05,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:05,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:05,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:05,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:05,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,479 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 19:56:05,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:56:05,547 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 19:56:05,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,551 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 19:56:05,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,554 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 19:56:05,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,582 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 12 treesize of output 8 [2021-06-12 19:56:05,583 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,585 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 12 treesize of output 8 [2021-06-12 19:56:05,586 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:05,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,608 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 19:56:05,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-12 19:56:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991275917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:05,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:05,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055189536] [2021-06-12 19:56:05,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:05,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:05,683 INFO L87 Difference]: Start difference. First operand 601 states and 1856 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:05,990 INFO L93 Difference]: Finished difference Result 811 states and 2445 transitions. [2021-06-12 19:56:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:05,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:05,991 INFO L225 Difference]: With dead ends: 811 [2021-06-12 19:56:05,991 INFO L226 Difference]: Without dead ends: 749 [2021-06-12 19:56:05,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-12 19:56:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 608. [2021-06-12 19:56:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.103789126853377) internal successors, (1884), 607 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1884 transitions. [2021-06-12 19:56:05,998 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1884 transitions. Word has length 24 [2021-06-12 19:56:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:05,998 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1884 transitions. [2021-06-12 19:56:05,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1884 transitions. [2021-06-12 19:56:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:05,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:05,999 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:06,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 19:56:06,199 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:06,199 INFO L82 PathProgramCache]: Analyzing trace with hash -761559396, now seen corresponding path program 52 times [2021-06-12 19:56:06,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:06,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206049220] [2021-06-12 19:56:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:06,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:06,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206049220] [2021-06-12 19:56:06,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206049220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282179932] [2021-06-12 19:56:06,338 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 19:56:06,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:06,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:06,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,454 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 18 treesize of output 14 [2021-06-12 19:56:06,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,457 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 18 treesize of output 14 [2021-06-12 19:56:06,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,509 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 17 treesize of output 13 [2021-06-12 19:56:06,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,512 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 17 treesize of output 13 [2021-06-12 19:56:06,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:06,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:56:06,658 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 19:56:06,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,662 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 20 treesize of output 16 [2021-06-12 19:56:06,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,667 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 20 treesize of output 16 [2021-06-12 19:56:06,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,672 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 20 treesize of output 16 [2021-06-12 19:56:06,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,677 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 20 treesize of output 16 [2021-06-12 19:56:06,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,687 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 19 treesize of output 15 [2021-06-12 19:56:06,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:06,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,696 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 19 treesize of output 15 [2021-06-12 19:56:06,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,700 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 19 treesize of output 15 [2021-06-12 19:56:06,701 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,863 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-12 19:56:06,863 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-06-12 19:56:06,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,867 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 13 treesize of output 9 [2021-06-12 19:56:06,868 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:06,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,872 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 12 treesize of output 8 [2021-06-12 19:56:06,873 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:06,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,876 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 12 treesize of output 8 [2021-06-12 19:56:06,877 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:06,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:06,942 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-06-12 19:56:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:07,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282179932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:07,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:07,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263224269] [2021-06-12 19:56:07,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:07,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:07,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:07,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:07,074 INFO L87 Difference]: Start difference. First operand 608 states and 1884 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 19:56:07,286 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 19:56:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:07,637 INFO L93 Difference]: Finished difference Result 1034 states and 3098 transitions. [2021-06-12 19:56:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:07,637 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 24 [2021-06-12 19:56:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:07,639 INFO L225 Difference]: With dead ends: 1034 [2021-06-12 19:56:07,639 INFO L226 Difference]: Without dead ends: 954 [2021-06-12 19:56:07,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-06-12 19:56:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 630. [2021-06-12 19:56:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.133545310015898) internal successors, (1971), 629 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1971 transitions. [2021-06-12 19:56:07,647 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1971 transitions. Word has length 24 [2021-06-12 19:56:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:07,647 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1971 transitions. [2021-06-12 19:56:07,647 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 19:56:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1971 transitions. [2021-06-12 19:56:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:07,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:07,648 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:07,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:07,853 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1189527654, now seen corresponding path program 53 times [2021-06-12 19:56:07,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:07,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289724945] [2021-06-12 19:56:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:08,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:08,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289724945] [2021-06-12 19:56:08,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289724945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840787073] [2021-06-12 19:56:08,000 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 19:56:08,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:08,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:08,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,118 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 18 treesize of output 14 [2021-06-12 19:56:08,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:08,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,173 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 17 treesize of output 13 [2021-06-12 19:56:08,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,176 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 17 treesize of output 13 [2021-06-12 19:56:08,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:08,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:56:08,312 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 19:56:08,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:08,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,320 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 20 treesize of output 16 [2021-06-12 19:56:08,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,324 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 20 treesize of output 16 [2021-06-12 19:56:08,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,329 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 20 treesize of output 16 [2021-06-12 19:56:08,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,333 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 19:56:08,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,337 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 20 treesize of output 16 [2021-06-12 19:56:08,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,341 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 19:56:08,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,345 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 19:56:08,346 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,493 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-12 19:56:08,494 INFO L628 ElimStorePlain]: treesize reduction 144, result has 51.5 percent of original size [2021-06-12 19:56:08,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,497 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 12 treesize of output 8 [2021-06-12 19:56:08,498 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,502 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 13 treesize of output 9 [2021-06-12 19:56:08,503 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,506 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 12 treesize of output 8 [2021-06-12 19:56:08,507 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:08,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:08,567 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:345, output treesize:81 [2021-06-12 19:56:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840787073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:08,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:08,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566331530] [2021-06-12 19:56:08,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:08,688 INFO L87 Difference]: Start difference. First operand 630 states and 1971 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19:56:09,104 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-12 19:56:09,266 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-12 19:56:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:09,507 INFO L93 Difference]: Finished difference Result 960 states and 2824 transitions. [2021-06-12 19:56:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 24 [2021-06-12 19:56:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:09,508 INFO L225 Difference]: With dead ends: 960 [2021-06-12 19:56:09,508 INFO L226 Difference]: Without dead ends: 875 [2021-06-12 19:56:09,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 864.7ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:56:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-12 19:56:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 625. [2021-06-12 19:56:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.1201923076923075) internal successors, (1947), 624 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1947 transitions. [2021-06-12 19:56:09,515 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1947 transitions. Word has length 24 [2021-06-12 19:56:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:09,515 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1947 transitions. [2021-06-12 19:56:09,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 19:56:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1947 transitions. [2021-06-12 19:56:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:09,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:09,516 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 19:56:09,729 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash -819865060, now seen corresponding path program 54 times [2021-06-12 19:56:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647629804] [2021-06-12 19:56:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:09,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:09,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647629804] [2021-06-12 19:56:09,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647629804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449699478] [2021-06-12 19:56:09,919 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 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 19:56:09,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:10,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,051 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 17 treesize of output 13 [2021-06-12 19:56:10,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,054 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 19:56:10,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,107 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 18 treesize of output 14 [2021-06-12 19:56:10,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,110 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 18 treesize of output 14 [2021-06-12 19:56:10,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:10,158 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:56:10,309 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 19:56:10,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,312 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 19 treesize of output 15 [2021-06-12 19:56:10,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,315 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 19:56:10,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:10,343 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:10,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,347 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 12 treesize of output 8 [2021-06-12 19:56:10,348 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:10,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,371 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 19:56:10,371 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-12 19:56:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:10,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449699478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:10,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:10,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615453555] [2021-06-12 19:56:10,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:10,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:10,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:10,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:10,459 INFO L87 Difference]: Start difference. First operand 625 states and 1947 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:10,685 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 19:56:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:11,081 INFO L93 Difference]: Finished difference Result 872 states and 2633 transitions. [2021-06-12 19:56:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:11,082 INFO L225 Difference]: With dead ends: 872 [2021-06-12 19:56:11,082 INFO L226 Difference]: Without dead ends: 822 [2021-06-12 19:56:11,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:56:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-12 19:56:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 616. [2021-06-12 19:56:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.0991869918699186) internal successors, (1906), 615 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1906 transitions. [2021-06-12 19:56:11,089 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1906 transitions. Word has length 24 [2021-06-12 19:56:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:11,089 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1906 transitions. [2021-06-12 19:56:11,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1906 transitions. [2021-06-12 19:56:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:11,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:11,090 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:11,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-12 19:56:11,291 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:11,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1346148980, now seen corresponding path program 55 times [2021-06-12 19:56:11,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:11,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887298550] [2021-06-12 19:56:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:11,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:11,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887298550] [2021-06-12 19:56:11,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887298550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714340459] [2021-06-12 19:56:11,453 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 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 19:56:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:11,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:11,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,576 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 18 treesize of output 14 [2021-06-12 19:56:11,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:11,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,638 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 19:56:11,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:11,686 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:56:11,821 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 19:56:11,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,825 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 19 treesize of output 15 [2021-06-12 19:56:11,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,831 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 20 treesize of output 16 [2021-06-12 19:56:11,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,835 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 19 treesize of output 15 [2021-06-12 19:56:11,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:11,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,923 INFO L628 ElimStorePlain]: treesize reduction 55, result has 64.1 percent of original size [2021-06-12 19:56:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,926 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 13 treesize of output 9 [2021-06-12 19:56:11,927 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:11,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:11,935 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:11,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,981 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 19:56:11,981 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:177, output treesize:47 [2021-06-12 19:56:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:12,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714340459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:12,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:12,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146512976] [2021-06-12 19:56:12,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:12,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:12,056 INFO L87 Difference]: Start difference. First operand 616 states and 1906 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:12,305 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 19:56:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:12,711 INFO L93 Difference]: Finished difference Result 750 states and 2255 transitions. [2021-06-12 19:56:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:12,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:12,712 INFO L225 Difference]: With dead ends: 750 [2021-06-12 19:56:12,712 INFO L226 Difference]: Without dead ends: 704 [2021-06-12 19:56:12,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-12 19:56:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 614. [2021-06-12 19:56:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.101141924959217) internal successors, (1901), 613 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1901 transitions. [2021-06-12 19:56:12,719 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1901 transitions. Word has length 24 [2021-06-12 19:56:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:12,719 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1901 transitions. [2021-06-12 19:56:12,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1901 transitions. [2021-06-12 19:56:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:12,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:12,720 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:12,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 19:56:12,920 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1553402530, now seen corresponding path program 56 times [2021-06-12 19:56:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:12,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060337086] [2021-06-12 19:56:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:13,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060337086] [2021-06-12 19:56:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060337086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130815017] [2021-06-12 19:56:13,073 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 19:56:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:13,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,236 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 18 treesize of output 14 [2021-06-12 19:56:13,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,239 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 17 treesize of output 13 [2021-06-12 19:56:13,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,268 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 19:56:13,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 19:56:13,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,381 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 19:56:13,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,391 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 11 treesize of output 7 [2021-06-12 19:56:13,393 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:13,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,401 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 19:56:13,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-12 19:56:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:13,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130815017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:13,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244920449] [2021-06-12 19:56:13,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:13,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:13,434 INFO L87 Difference]: Start difference. First operand 614 states and 1901 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:13,624 INFO L93 Difference]: Finished difference Result 683 states and 2074 transitions. [2021-06-12 19:56:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:13,625 INFO L225 Difference]: With dead ends: 683 [2021-06-12 19:56:13,625 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 19:56:13,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 19:56:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 620. [2021-06-12 19:56:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.098546042003231) internal successors, (1918), 619 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1918 transitions. [2021-06-12 19:56:13,631 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1918 transitions. Word has length 24 [2021-06-12 19:56:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:13,631 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1918 transitions. [2021-06-12 19:56:13,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1918 transitions. [2021-06-12 19:56:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:13,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:13,632 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:13,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 19:56:13,837 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -184569286, now seen corresponding path program 57 times [2021-06-12 19:56:13,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:13,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591959437] [2021-06-12 19:56:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:14,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:14,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591959437] [2021-06-12 19:56:14,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591959437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398077502] [2021-06-12 19:56:14,018 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 19:56:14,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:14,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:14,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,154 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 19:56:14,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,177 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 19:56:14,177 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-06-12 19:56:14,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,240 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 19 treesize of output 15 [2021-06-12 19:56:14,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,243 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 19:56:14,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,306 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 7 [2021-06-12 19:56:14,307 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,310 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 7 [2021-06-12 19:56:14,311 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:14,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,370 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 20 treesize of output 16 [2021-06-12 19:56:14,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,374 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 20 treesize of output 16 [2021-06-12 19:56:14,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,428 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 12 treesize of output 8 [2021-06-12 19:56:14,429 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,432 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 12 treesize of output 8 [2021-06-12 19:56:14,433 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:14,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:14,485 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-06-12 19:56:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:14,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398077502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:14,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730926747] [2021-06-12 19:56:14,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:14,576 INFO L87 Difference]: Start difference. First operand 620 states and 1918 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:14,932 INFO L93 Difference]: Finished difference Result 787 states and 2369 transitions. [2021-06-12 19:56:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:14,933 INFO L225 Difference]: With dead ends: 787 [2021-06-12 19:56:14,933 INFO L226 Difference]: Without dead ends: 721 [2021-06-12 19:56:14,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-12 19:56:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 618. [2021-06-12 19:56:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.1004862236628847) internal successors, (1913), 617 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1913 transitions. [2021-06-12 19:56:14,940 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1913 transitions. Word has length 24 [2021-06-12 19:56:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:14,940 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1913 transitions. [2021-06-12 19:56:14,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1913 transitions. [2021-06-12 19:56:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:14,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:14,941 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:15,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:15,142 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -722062142, now seen corresponding path program 58 times [2021-06-12 19:56:15,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:15,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689187288] [2021-06-12 19:56:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:15,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:15,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689187288] [2021-06-12 19:56:15,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689187288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820088232] [2021-06-12 19:56:15,300 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 19:56:15,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:15,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,425 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 19:56:15,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,434 INFO 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 19:56:15,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-12 19:56:15,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,474 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 19 treesize of output 15 [2021-06-12 19:56:15,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,477 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 20 treesize of output 16 [2021-06-12 19:56:15,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,504 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 12 treesize of output 8 [2021-06-12 19:56:15,505 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:15,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,507 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 13 treesize of output 9 [2021-06-12 19:56:15,508 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:15,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,532 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 19:56:15,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-06-12 19:56:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:15,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820088232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:15,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:15,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469411446] [2021-06-12 19:56:15,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:15,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:15,585 INFO L87 Difference]: Start difference. First operand 618 states and 1913 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 19:56:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:15,758 INFO L93 Difference]: Finished difference Result 679 states and 2064 transitions. [2021-06-12 19:56:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:15,759 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 24 [2021-06-12 19:56:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:15,759 INFO L225 Difference]: With dead ends: 679 [2021-06-12 19:56:15,759 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 19:56:15,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 19:56:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 618. [2021-06-12 19:56:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.1004862236628847) internal successors, (1913), 617 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1913 transitions. [2021-06-12 19:56:15,765 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1913 transitions. Word has length 24 [2021-06-12 19:56:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:15,766 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1913 transitions. [2021-06-12 19:56:15,766 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 19:56:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1913 transitions. [2021-06-12 19:56:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:15,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:15,767 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:15,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-12 19:56:15,967 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash 664700228, now seen corresponding path program 59 times [2021-06-12 19:56:15,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:15,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666790700] [2021-06-12 19:56:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:16,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666790700] [2021-06-12 19:56:16,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666790700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357815969] [2021-06-12 19:56:16,142 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 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 19:56:16,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:16,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,233 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 17 treesize of output 13 [2021-06-12 19:56:16,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,236 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 18 treesize of output 14 [2021-06-12 19:56:16,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,264 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 19:56:16,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 19:56:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,511 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 19 treesize of output 15 [2021-06-12 19:56:16,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,514 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 19:56:16,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,542 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 11 treesize of output 7 [2021-06-12 19:56:16,544 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:16,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:56:16,547 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:16,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,571 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 19:56:16,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 19:56:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:16,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357815969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:16,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:16,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819953907] [2021-06-12 19:56:16,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:16,639 INFO L87 Difference]: Start difference. First operand 618 states and 1913 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:17,159 INFO L93 Difference]: Finished difference Result 771 states and 2338 transitions. [2021-06-12 19:56:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:17,160 INFO L225 Difference]: With dead ends: 771 [2021-06-12 19:56:17,160 INFO L226 Difference]: Without dead ends: 712 [2021-06-12 19:56:17,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-06-12 19:56:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 626. [2021-06-12 19:56:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.112) internal successors, (1945), 625 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1945 transitions. [2021-06-12 19:56:17,166 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1945 transitions. Word has length 24 [2021-06-12 19:56:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:17,167 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1945 transitions. [2021-06-12 19:56:17,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1945 transitions. [2021-06-12 19:56:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:17,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:17,167 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:17,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-12 19:56:17,368 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1073271588, now seen corresponding path program 60 times [2021-06-12 19:56:17,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:17,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020178246] [2021-06-12 19:56:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:17,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020178246] [2021-06-12 19:56:17,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020178246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553294551] [2021-06-12 19:56:17,561 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 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 19:56:17,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:17,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:17,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:17,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,686 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 19:56:17,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 19:56:17,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,816 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 19:56:17,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,820 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 20 treesize of output 16 [2021-06-12 19:56:17,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,882 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 12 treesize of output 8 [2021-06-12 19:56:17,884 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,887 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 12 treesize of output 8 [2021-06-12 19:56:17,888 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:17,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,947 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 19:56:17,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:17,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,008 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 7 [2021-06-12 19:56:18,009 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:18,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:56:18,013 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:18,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:18,062 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-06-12 19:56:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:18,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553294551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:18,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:18,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982389770] [2021-06-12 19:56:18,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:18,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:18,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:18,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:18,154 INFO L87 Difference]: Start difference. First operand 626 states and 1945 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 19:56:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:18,744 INFO L93 Difference]: Finished difference Result 780 states and 2341 transitions. [2021-06-12 19:56:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:18,745 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 24 [2021-06-12 19:56:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:18,745 INFO L225 Difference]: With dead ends: 780 [2021-06-12 19:56:18,745 INFO L226 Difference]: Without dead ends: 731 [2021-06-12 19:56:18,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-12 19:56:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 626. [2021-06-12 19:56:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.112) internal successors, (1945), 625 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1945 transitions. [2021-06-12 19:56:18,752 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1945 transitions. Word has length 24 [2021-06-12 19:56:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:18,752 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1945 transitions. [2021-06-12 19:56:18,752 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 19:56:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1945 transitions. [2021-06-12 19:56:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:18,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:18,753 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:18,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:18,954 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1407355204, now seen corresponding path program 61 times [2021-06-12 19:56:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:18,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372162234] [2021-06-12 19:56:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:19,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:19,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372162234] [2021-06-12 19:56:19,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372162234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:19,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966767485] [2021-06-12 19:56:19,143 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 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 19:56:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:19,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:19,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,259 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 17 treesize of output 13 [2021-06-12 19:56:19,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,262 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 18 treesize of output 14 [2021-06-12 19:56:19,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,266 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 18 treesize of output 14 [2021-06-12 19:56:19,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,270 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 17 treesize of output 13 [2021-06-12 19:56:19,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:19,334 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:56:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:19,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:56:19,581 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:19,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,609 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 19:56:19,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,636 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 7 [2021-06-12 19:56:19,637 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:19,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,661 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 19:56:19,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-12 19:56:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:19,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966767485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:19,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:19,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:19,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71271579] [2021-06-12 19:56:19,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:19,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:19,731 INFO L87 Difference]: Start difference. First operand 626 states and 1945 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:20,158 INFO L93 Difference]: Finished difference Result 837 states and 2488 transitions. [2021-06-12 19:56:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:20,159 INFO L225 Difference]: With dead ends: 837 [2021-06-12 19:56:20,159 INFO L226 Difference]: Without dead ends: 760 [2021-06-12 19:56:20,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-12 19:56:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 626. [2021-06-12 19:56:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.112) internal successors, (1945), 625 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1945 transitions. [2021-06-12 19:56:20,166 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1945 transitions. Word has length 24 [2021-06-12 19:56:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:20,166 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1945 transitions. [2021-06-12 19:56:20,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1945 transitions. [2021-06-12 19:56:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:20,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:20,167 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:20,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:20,367 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1233463034, now seen corresponding path program 62 times [2021-06-12 19:56:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:20,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666331178] [2021-06-12 19:56:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:20,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:20,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666331178] [2021-06-12 19:56:20,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666331178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:20,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160285016] [2021-06-12 19:56:20,525 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 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 19:56:20,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:20,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:20,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,629 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 18 treesize of output 14 [2021-06-12 19:56:20,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,633 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 19:56:20,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,637 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 17 treesize of output 13 [2021-06-12 19:56:20,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:20,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:20,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:20,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:56:20,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,837 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 19 treesize of output 15 [2021-06-12 19:56:20,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:20,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:20,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,904 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 7 [2021-06-12 19:56:20,906 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:20,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:20,969 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 19:56:20,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:56:21,035 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:21,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,093 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 20 treesize of output 16 [2021-06-12 19:56:21,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:21,152 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:21,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,208 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 20 treesize of output 16 [2021-06-12 19:56:21,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,261 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 12 treesize of output 8 [2021-06-12 19:56:21,263 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:21,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,313 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 19:56:21,313 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:75 [2021-06-12 19:56:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:21,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160285016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:21,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:21,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:21,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705331615] [2021-06-12 19:56:21,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:21,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:21,413 INFO L87 Difference]: Start difference. First operand 626 states and 1945 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 19:56:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:21,686 INFO L93 Difference]: Finished difference Result 830 states and 2484 transitions. [2021-06-12 19:56:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:21,686 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 24 [2021-06-12 19:56:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:21,687 INFO L225 Difference]: With dead ends: 830 [2021-06-12 19:56:21,687 INFO L226 Difference]: Without dead ends: 783 [2021-06-12 19:56:21,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-12 19:56:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 633. [2021-06-12 19:56:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.132911392405063) internal successors, (1980), 632 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1980 transitions. [2021-06-12 19:56:21,694 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1980 transitions. Word has length 24 [2021-06-12 19:56:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:21,694 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1980 transitions. [2021-06-12 19:56:21,694 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 19:56:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1980 transitions. [2021-06-12 19:56:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:21,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:21,695 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:21,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-12 19:56:21,896 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash 353189498, now seen corresponding path program 63 times [2021-06-12 19:56:21,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:21,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749842152] [2021-06-12 19:56:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:22,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:22,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749842152] [2021-06-12 19:56:22,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749842152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585534506] [2021-06-12 19:56:22,070 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 19:56:22,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:22,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:22,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,171 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 18 treesize of output 14 [2021-06-12 19:56:22,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,174 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 19:56:22,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,205 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 19:56:22,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 19:56:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,284 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 20 treesize of output 16 [2021-06-12 19:56:22,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:22,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:22,366 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:22,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:22,370 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:22,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,438 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 19:56:22,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,442 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 19:56:22,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,505 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 11 treesize of output 7 [2021-06-12 19:56:22,506 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:22,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,509 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 11 treesize of output 7 [2021-06-12 19:56:22,510 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:22,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:22,568 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:75 [2021-06-12 19:56:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585534506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:22,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:22,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498470078] [2021-06-12 19:56:22,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:22,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:22,689 INFO L87 Difference]: Start difference. First operand 633 states and 1980 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 19:56:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:23,253 INFO L93 Difference]: Finished difference Result 806 states and 2414 transitions. [2021-06-12 19:56:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:56:23,254 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 24 [2021-06-12 19:56:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:23,254 INFO L225 Difference]: With dead ends: 806 [2021-06-12 19:56:23,255 INFO L226 Difference]: Without dead ends: 765 [2021-06-12 19:56:23,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-12 19:56:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 627. [2021-06-12 19:56:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 3.1150159744408947) internal successors, (1950), 626 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1950 transitions. [2021-06-12 19:56:23,261 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1950 transitions. Word has length 24 [2021-06-12 19:56:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:23,261 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1950 transitions. [2021-06-12 19:56:23,261 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 19:56:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1950 transitions. [2021-06-12 19:56:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:23,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:23,262 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:23,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:23,472 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2067234404, now seen corresponding path program 64 times [2021-06-12 19:56:23,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:23,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550384577] [2021-06-12 19:56:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:23,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:23,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550384577] [2021-06-12 19:56:23,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550384577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105193984] [2021-06-12 19:56:23,657 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 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 19:56:23,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:23,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:23,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:23,759 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 19:56:23,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:23,763 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 19 treesize of output 15 [2021-06-12 19:56:23,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:23,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:23,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:23,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:23,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:23,844 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 19:56:23,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:23,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:23,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:56:24,108 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 19:56:24,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,112 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 29 treesize of output 23 [2021-06-12 19:56:24,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,117 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 29 treesize of output 23 [2021-06-12 19:56:24,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:24,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:24,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,217 INFO L628 ElimStorePlain]: treesize reduction 56, result has 65.2 percent of original size [2021-06-12 19:56:24,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,220 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 7 [2021-06-12 19:56:24,221 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,224 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 8 [2021-06-12 19:56:24,225 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:24,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:24,263 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 19:56:24,263 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:213, output treesize:47 [2021-06-12 19:56:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:24,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105193984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:24,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:24,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:24,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768451148] [2021-06-12 19:56:24,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:24,339 INFO L87 Difference]: Start difference. First operand 627 states and 1950 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:24,774 INFO L93 Difference]: Finished difference Result 749 states and 2295 transitions. [2021-06-12 19:56:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:24,775 INFO L225 Difference]: With dead ends: 749 [2021-06-12 19:56:24,775 INFO L226 Difference]: Without dead ends: 696 [2021-06-12 19:56:24,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-12 19:56:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 630. [2021-06-12 19:56:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.1160572337042924) internal successors, (1960), 629 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1960 transitions. [2021-06-12 19:56:24,782 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1960 transitions. Word has length 24 [2021-06-12 19:56:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:24,782 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1960 transitions. [2021-06-12 19:56:24,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1960 transitions. [2021-06-12 19:56:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:24,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:24,783 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:24,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-12 19:56:24,983 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash 98903938, now seen corresponding path program 65 times [2021-06-12 19:56:24,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:24,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613011289] [2021-06-12 19:56:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:25,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613011289] [2021-06-12 19:56:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613011289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917866610] [2021-06-12 19:56:25,133 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 19:56:25,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:25,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:25,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,236 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 19:56:25,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,265 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 19 treesize of output 15 [2021-06-12 19:56:25,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:56:25,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 19:56:25,364 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 19:56:25,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,368 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 19 treesize of output 15 [2021-06-12 19:56:25,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,373 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 20 treesize of output 16 [2021-06-12 19:56:25,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:25,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,382 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 20 treesize of output 16 [2021-06-12 19:56:25,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,447 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 13 treesize of output 9 [2021-06-12 19:56:25,449 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:25,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:25,453 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:25,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,456 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 12 treesize of output 8 [2021-06-12 19:56:25,457 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:25,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,460 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 13 treesize of output 9 [2021-06-12 19:56:25,461 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:25,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,519 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 19:56:25,519 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-06-12 19:56:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:25,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917866610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:25,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:25,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103957771] [2021-06-12 19:56:25,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:25,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:25,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:25,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:25,620 INFO L87 Difference]: Start difference. First operand 630 states and 1960 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 19:56:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:25,949 INFO L93 Difference]: Finished difference Result 779 states and 2359 transitions. [2021-06-12 19:56:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:25,949 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 24 [2021-06-12 19:56:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:25,950 INFO L225 Difference]: With dead ends: 779 [2021-06-12 19:56:25,950 INFO L226 Difference]: Without dead ends: 732 [2021-06-12 19:56:25,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-12 19:56:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 637. [2021-06-12 19:56:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.1367924528301887) internal successors, (1995), 636 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1995 transitions. [2021-06-12 19:56:25,957 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1995 transitions. Word has length 24 [2021-06-12 19:56:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:25,957 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1995 transitions. [2021-06-12 19:56:25,957 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 19:56:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1995 transitions. [2021-06-12 19:56:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:25,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:25,958 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:26,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 19:56:26,158 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash -781369598, now seen corresponding path program 66 times [2021-06-12 19:56:26,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:26,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184437360] [2021-06-12 19:56:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:26,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:26,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184437360] [2021-06-12 19:56:26,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184437360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:26,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136993022] [2021-06-12 19:56:26,288 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 19:56:26,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:26,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:26,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:26,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:26,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,469 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 19:56:26,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,473 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 19:56:26,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:26,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:26,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:56:26,675 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 19:56:26,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,679 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 20 treesize of output 16 [2021-06-12 19:56:26,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,684 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 19 treesize of output 15 [2021-06-12 19:56:26,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,689 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 20 treesize of output 16 [2021-06-12 19:56:26,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,693 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 19 treesize of output 15 [2021-06-12 19:56:26,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,698 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 19 treesize of output 15 [2021-06-12 19:56:26,699 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,716 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 20 treesize of output 16 [2021-06-12 19:56:26,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,721 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 19:56:26,721 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,725 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 20 treesize of output 16 [2021-06-12 19:56:26,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:26,911 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-12 19:56:26,912 INFO L628 ElimStorePlain]: treesize reduction 173, result has 54.0 percent of original size [2021-06-12 19:56:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,916 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 12 treesize of output 8 [2021-06-12 19:56:26,917 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:26,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:26,922 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:26,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:26,925 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 13 treesize of output 9 [2021-06-12 19:56:26,926 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:26,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:27,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:27,001 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:102 [2021-06-12 19:56:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:27,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136993022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:27,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:27,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014644899] [2021-06-12 19:56:27,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:27,125 INFO L87 Difference]: Start difference. First operand 637 states and 1995 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 19:56:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:27,562 INFO L93 Difference]: Finished difference Result 974 states and 2866 transitions. [2021-06-12 19:56:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:27,563 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 24 [2021-06-12 19:56:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:27,564 INFO L225 Difference]: With dead ends: 974 [2021-06-12 19:56:27,564 INFO L226 Difference]: Without dead ends: 856 [2021-06-12 19:56:27,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-12 19:56:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 630. [2021-06-12 19:56:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.120826709062003) internal successors, (1963), 629 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1963 transitions. [2021-06-12 19:56:27,571 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1963 transitions. Word has length 24 [2021-06-12 19:56:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:27,571 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1963 transitions. [2021-06-12 19:56:27,571 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 19:56:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1963 transitions. [2021-06-12 19:56:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:27,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:27,572 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:27,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-12 19:56:27,777 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2007079852, now seen corresponding path program 67 times [2021-06-12 19:56:27,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:27,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926625578] [2021-06-12 19:56:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:27,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:27,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926625578] [2021-06-12 19:56:27,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926625578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118805552] [2021-06-12 19:56:27,915 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 19:56:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:28,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,030 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 17 treesize of output 13 [2021-06-12 19:56:28,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,035 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 18 treesize of output 14 [2021-06-12 19:56:28,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,038 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 18 treesize of output 14 [2021-06-12 19:56:28,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,042 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 17 treesize of output 13 [2021-06-12 19:56:28,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:28,119 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 19:56:28,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,479 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 19:56:28,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,482 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 19 treesize of output 15 [2021-06-12 19:56:28,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,512 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-12 19:56:28,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,514 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 11 treesize of output 7 [2021-06-12 19:56:28,516 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:28,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,526 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 19:56:28,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-12 19:56:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:28,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118805552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:28,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:28,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:28,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680790486] [2021-06-12 19:56:28,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:28,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:28,557 INFO L87 Difference]: Start difference. First operand 630 states and 1963 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 19:56:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:28,927 INFO L93 Difference]: Finished difference Result 737 states and 2231 transitions. [2021-06-12 19:56:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:56:28,927 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 24 [2021-06-12 19:56:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:28,928 INFO L225 Difference]: With dead ends: 737 [2021-06-12 19:56:28,928 INFO L226 Difference]: Without dead ends: 666 [2021-06-12 19:56:28,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-12 19:56:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 648. [2021-06-12 19:56:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.1128284389489953) internal successors, (2014), 647 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2014 transitions. [2021-06-12 19:56:28,935 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2014 transitions. Word has length 24 [2021-06-12 19:56:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:28,935 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 2014 transitions. [2021-06-12 19:56:28,935 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 19:56:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2014 transitions. [2021-06-12 19:56:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:28,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:28,936 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:29,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:29,136 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:29,136 INFO L82 PathProgramCache]: Analyzing trace with hash 549915628, now seen corresponding path program 68 times [2021-06-12 19:56:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:29,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422830680] [2021-06-12 19:56:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:29,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422830680] [2021-06-12 19:56:29,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422830680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138327882] [2021-06-12 19:56:29,313 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 19:56:29,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:29,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:29,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:29,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:29,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,420 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 17 treesize of output 13 [2021-06-12 19:56:29,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,424 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 19:56:29,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,427 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 18 treesize of output 14 [2021-06-12 19:56:29,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:29,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:29,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 19:56:29,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,709 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 19 treesize of output 15 [2021-06-12 19:56:29,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,713 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 19 treesize of output 15 [2021-06-12 19:56:29,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,816 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:56:29,817 INFO L628 ElimStorePlain]: treesize reduction 49, result has 68.4 percent of original size [2021-06-12 19:56:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,820 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 20 treesize of output 16 [2021-06-12 19:56:29,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,824 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 9 treesize of output 7 [2021-06-12 19:56:29,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,867 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 11 treesize of output 7 [2021-06-12 19:56:29,869 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:29,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,909 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 13 treesize of output 9 [2021-06-12 19:56:29,910 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:29,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:56:29,944 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:169, output treesize:47 [2021-06-12 19:56:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:30,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138327882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:30,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:30,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419857895] [2021-06-12 19:56:30,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:30,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:30,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:30,018 INFO L87 Difference]: Start difference. First operand 648 states and 2014 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:30,545 INFO L93 Difference]: Finished difference Result 872 states and 2581 transitions. [2021-06-12 19:56:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:30,546 INFO L225 Difference]: With dead ends: 872 [2021-06-12 19:56:30,546 INFO L226 Difference]: Without dead ends: 796 [2021-06-12 19:56:30,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-12 19:56:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 656. [2021-06-12 19:56:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 3.120610687022901) internal successors, (2044), 655 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2044 transitions. [2021-06-12 19:56:30,553 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2044 transitions. Word has length 24 [2021-06-12 19:56:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:30,553 INFO L482 AbstractCegarLoop]: Abstraction has 656 states and 2044 transitions. [2021-06-12 19:56:30,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2044 transitions. [2021-06-12 19:56:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:30,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:30,554 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:30,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-12 19:56:30,755 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 56161842, now seen corresponding path program 69 times [2021-06-12 19:56:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:30,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452788369] [2021-06-12 19:56:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:30,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:30,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452788369] [2021-06-12 19:56:30,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452788369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127020538] [2021-06-12 19:56:30,913 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 19:56:30,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:31,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,019 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 19:56:31,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,022 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 18 treesize of output 14 [2021-06-12 19:56:31,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,046 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 2 xjuncts. [2021-06-12 19:56:31,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-12 19:56:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,152 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 19 treesize of output 15 [2021-06-12 19:56:31,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,156 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 19:56:31,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,182 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 11 treesize of output 7 [2021-06-12 19:56:31,183 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:31,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:56:31,186 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:31,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,206 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 19:56:31,206 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:25 [2021-06-12 19:56:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127020538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:31,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:31,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:31,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771488603] [2021-06-12 19:56:31,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:31,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:31,259 INFO L87 Difference]: Start difference. First operand 656 states and 2044 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:31,774 INFO L93 Difference]: Finished difference Result 841 states and 2513 transitions. [2021-06-12 19:56:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:31,775 INFO L225 Difference]: With dead ends: 841 [2021-06-12 19:56:31,775 INFO L226 Difference]: Without dead ends: 743 [2021-06-12 19:56:31,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-12 19:56:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 669. [2021-06-12 19:56:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.127245508982036) internal successors, (2089), 668 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2089 transitions. [2021-06-12 19:56:31,783 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2089 transitions. Word has length 24 [2021-06-12 19:56:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:31,783 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2089 transitions. [2021-06-12 19:56:31,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2089 transitions. [2021-06-12 19:56:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:31,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:31,784 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:31,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:32,000 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1264424876, now seen corresponding path program 70 times [2021-06-12 19:56:32,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:32,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497872863] [2021-06-12 19:56:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:32,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497872863] [2021-06-12 19:56:32,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497872863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261975506] [2021-06-12 19:56:32,193 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 19:56:32,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:32,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:32,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,299 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 17 treesize of output 13 [2021-06-12 19:56:32,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:32,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,306 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 18 treesize of output 14 [2021-06-12 19:56:32,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,310 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 18 treesize of output 14 [2021-06-12 19:56:32,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:32,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 19:56:32,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,608 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 19 treesize of output 15 [2021-06-12 19:56:32,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,636 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 19 treesize of output 15 [2021-06-12 19:56:32,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,662 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 11 treesize of output 7 [2021-06-12 19:56:32,663 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:32,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:32,688 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 12 treesize of output 8 [2021-06-12 19:56:32,689 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:32,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,710 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 19:56:32,710 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:31 [2021-06-12 19:56:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:32,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261975506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:32,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:32,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856124044] [2021-06-12 19:56:32,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:32,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:32,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:32,775 INFO L87 Difference]: Start difference. First operand 669 states and 2089 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:33,223 INFO L93 Difference]: Finished difference Result 897 states and 2704 transitions. [2021-06-12 19:56:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:33,224 INFO L225 Difference]: With dead ends: 897 [2021-06-12 19:56:33,224 INFO L226 Difference]: Without dead ends: 820 [2021-06-12 19:56:33,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-12 19:56:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 662. [2021-06-12 19:56:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.128593040847201) internal successors, (2068), 661 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2068 transitions. [2021-06-12 19:56:33,232 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2068 transitions. Word has length 24 [2021-06-12 19:56:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:33,232 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 2068 transitions. [2021-06-12 19:56:33,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2068 transitions. [2021-06-12 19:56:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:33,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:33,233 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:33,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-12 19:56:33,437 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1438317046, now seen corresponding path program 71 times [2021-06-12 19:56:33,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:33,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589131153] [2021-06-12 19:56:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:33,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:33,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589131153] [2021-06-12 19:56:33,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589131153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:33,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815355431] [2021-06-12 19:56:33,589 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 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 19:56:33,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:33,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:33,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,693 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 17 treesize of output 13 [2021-06-12 19:56:33,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,697 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 18 treesize of output 14 [2021-06-12 19:56:33,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,700 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 18 treesize of output 14 [2021-06-12 19:56:33,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,704 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 17 treesize of output 13 [2021-06-12 19:56:33,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:33,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:33,761 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 19:56:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:33,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:33,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,939 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 20 treesize of output 16 [2021-06-12 19:56:33,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,005 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 19:56:34,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,060 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 11 treesize of output 7 [2021-06-12 19:56:34,062 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:34,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:34,121 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:34,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,177 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 19:56:34,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,230 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 7 [2021-06-12 19:56:34,231 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:34,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,280 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 13 treesize of output 9 [2021-06-12 19:56:34,281 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:34,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,326 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 19:56:34,326 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-06-12 19:56:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:34,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815355431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:34,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:34,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:34,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201556729] [2021-06-12 19:56:34,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:34,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:34,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:34,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:34,420 INFO L87 Difference]: Start difference. First operand 662 states and 2068 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 19:56:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:34,780 INFO L93 Difference]: Finished difference Result 914 states and 2731 transitions. [2021-06-12 19:56:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:56:34,780 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 24 [2021-06-12 19:56:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:34,781 INFO L225 Difference]: With dead ends: 914 [2021-06-12 19:56:34,781 INFO L226 Difference]: Without dead ends: 867 [2021-06-12 19:56:34,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-06-12 19:56:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 672. [2021-06-12 19:56:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.157973174366617) internal successors, (2119), 671 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2119 transitions. [2021-06-12 19:56:34,789 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2119 transitions. Word has length 24 [2021-06-12 19:56:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:34,789 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2119 transitions. [2021-06-12 19:56:34,789 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 19:56:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2119 transitions. [2021-06-12 19:56:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:34,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:34,790 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:34,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-12 19:56:34,990 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1976376714, now seen corresponding path program 72 times [2021-06-12 19:56:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882277964] [2021-06-12 19:56:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:35,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:35,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882277964] [2021-06-12 19:56:35,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882277964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297415270] [2021-06-12 19:56:35,198 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 19:56:35,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:56:35,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:35,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:56:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:35,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:35,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,304 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 18 treesize of output 14 [2021-06-12 19:56:35,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,328 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 2 xjuncts. [2021-06-12 19:56:35,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-12 19:56:35,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:35,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:35,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,459 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 12 treesize of output 8 [2021-06-12 19:56:35,460 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:35,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,463 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 12 treesize of output 8 [2021-06-12 19:56:35,464 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:35,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,530 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 19:56:35,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,534 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 19 treesize of output 15 [2021-06-12 19:56:35,534 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:56:35,592 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:35,595 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 11 treesize of output 7 [2021-06-12 19:56:35,596 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:35,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:35,646 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:69 [2021-06-12 19:56:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:35,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297415270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:35,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:35,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559091502] [2021-06-12 19:56:35,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:35,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:35,791 INFO L87 Difference]: Start difference. First operand 672 states and 2119 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:36,235 INFO L93 Difference]: Finished difference Result 1028 states and 3032 transitions. [2021-06-12 19:56:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:36,237 INFO L225 Difference]: With dead ends: 1028 [2021-06-12 19:56:36,237 INFO L226 Difference]: Without dead ends: 971 [2021-06-12 19:56:36,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-12 19:56:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 669. [2021-06-12 19:56:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.1497005988023954) internal successors, (2104), 668 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2104 transitions. [2021-06-12 19:56:36,245 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2104 transitions. Word has length 24 [2021-06-12 19:56:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:36,245 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2104 transitions. [2021-06-12 19:56:36,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:36,245 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2104 transitions. [2021-06-12 19:56:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:36,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:36,246 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:36,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:36,446 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:36,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1969687262, now seen corresponding path program 73 times [2021-06-12 19:56:36,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:36,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972223751] [2021-06-12 19:56:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:36,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:36,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972223751] [2021-06-12 19:56:36,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972223751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424918703] [2021-06-12 19:56:36,575 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 19:56:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:36,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:36,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,698 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 17 treesize of output 13 [2021-06-12 19:56:36,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,701 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 17 treesize of output 13 [2021-06-12 19:56:36,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,728 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 19:56:36,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-06-12 19:56:36,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,828 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 19:56:36,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,837 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 11 treesize of output 7 [2021-06-12 19:56:36,838 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:36,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,845 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 19:56:36,845 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2021-06-12 19:56:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:36,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424918703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:36,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528555361] [2021-06-12 19:56:36,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:36,883 INFO L87 Difference]: Start difference. First operand 669 states and 2104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:37,185 INFO L93 Difference]: Finished difference Result 767 states and 2355 transitions. [2021-06-12 19:56:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:37,187 INFO L225 Difference]: With dead ends: 767 [2021-06-12 19:56:37,187 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 19:56:37,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 19:56:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 657. [2021-06-12 19:56:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.1570121951219514) internal successors, (2071), 656 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2071 transitions. [2021-06-12 19:56:37,193 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2071 transitions. Word has length 24 [2021-06-12 19:56:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:37,193 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2071 transitions. [2021-06-12 19:56:37,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2071 transitions. [2021-06-12 19:56:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:37,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:37,194 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:37,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:37,410 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028642, now seen corresponding path program 74 times [2021-06-12 19:56:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:37,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530818896] [2021-06-12 19:56:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:37,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530818896] [2021-06-12 19:56:37,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530818896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845505926] [2021-06-12 19:56:37,556 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 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 19:56:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,688 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 17 treesize of output 13 [2021-06-12 19:56:37,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:37,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,721 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 19:56:37,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-12 19:56:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,875 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 19 treesize of output 15 [2021-06-12 19:56:37,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,905 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 11 treesize of output 7 [2021-06-12 19:56:37,906 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:37,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:37,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,961 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 7 [2021-06-12 19:56:37,962 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:37,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,986 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 19:56:37,986 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-12 19:56:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:38,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845505926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:38,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:38,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969388600] [2021-06-12 19:56:38,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:38,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:38,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:38,069 INFO L87 Difference]: Start difference. First operand 657 states and 2071 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:38,316 INFO L93 Difference]: Finished difference Result 749 states and 2305 transitions. [2021-06-12 19:56:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:38,317 INFO L225 Difference]: With dead ends: 749 [2021-06-12 19:56:38,317 INFO L226 Difference]: Without dead ends: 730 [2021-06-12 19:56:38,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-12 19:56:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 639. [2021-06-12 19:56:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.1206896551724137) internal successors, (1991), 638 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1991 transitions. [2021-06-12 19:56:38,324 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1991 transitions. Word has length 24 [2021-06-12 19:56:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:38,324 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1991 transitions. [2021-06-12 19:56:38,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1991 transitions. [2021-06-12 19:56:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:38,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:38,325 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:38,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:38,525 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash -934962452, now seen corresponding path program 75 times [2021-06-12 19:56:38,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:38,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650775806] [2021-06-12 19:56:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:38,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:38,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650775806] [2021-06-12 19:56:38,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650775806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174983926] [2021-06-12 19:56:38,655 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 19:56:38,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:38,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:38,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:38,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,797 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 17 treesize of output 13 [2021-06-12 19:56:38,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,799 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 19:56:38,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,822 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 19:56:38,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:56:38,876 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 19:56:38,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,879 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 19:56:38,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,882 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 19:56:38,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,908 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 12 treesize of output 8 [2021-06-12 19:56:38,909 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:38,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,912 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 12 treesize of output 8 [2021-06-12 19:56:38,913 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:38,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,935 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 19:56:38,935 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-12 19:56:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:39,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174983926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:39,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:56:39,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349256011] [2021-06-12 19:56:39,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:39,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:39,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:39,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:39,004 INFO L87 Difference]: Start difference. First operand 639 states and 1991 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 19:56:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:39,267 INFO L93 Difference]: Finished difference Result 778 states and 2376 transitions. [2021-06-12 19:56:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:39,267 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 24 [2021-06-12 19:56:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:39,268 INFO L225 Difference]: With dead ends: 778 [2021-06-12 19:56:39,268 INFO L226 Difference]: Without dead ends: 716 [2021-06-12 19:56:39,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-12 19:56:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 639. [2021-06-12 19:56:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.1206896551724137) internal successors, (1991), 638 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1991 transitions. [2021-06-12 19:56:39,275 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1991 transitions. Word has length 24 [2021-06-12 19:56:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:39,275 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1991 transitions. [2021-06-12 19:56:39,275 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 19:56:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1991 transitions. [2021-06-12 19:56:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:39,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:39,276 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:39,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:39,477 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:39,478 INFO L82 PathProgramCache]: Analyzing trace with hash -303757950, now seen corresponding path program 76 times [2021-06-12 19:56:39,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:39,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070941229] [2021-06-12 19:56:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:39,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:39,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070941229] [2021-06-12 19:56:39,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070941229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810124460] [2021-06-12 19:56:39,664 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 19:56:39,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:39,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:39,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:39,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,765 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 17 treesize of output 13 [2021-06-12 19:56:39,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,768 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 19:56:39,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,820 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 18 treesize of output 14 [2021-06-12 19:56:39,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,823 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 18 treesize of output 14 [2021-06-12 19:56:39,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:39,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:56:39,968 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 19:56:39,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,973 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 20 treesize of output 16 [2021-06-12 19:56:39,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,979 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 20 treesize of output 16 [2021-06-12 19:56:39,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,984 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 19:56:39,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,989 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 20 treesize of output 16 [2021-06-12 19:56:39,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,993 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 19:56:39,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,998 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 19:56:39,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,002 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 20 treesize of output 16 [2021-06-12 19:56:40,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,007 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 19:56:40,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:40,176 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-12 19:56:40,176 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-06-12 19:56:40,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,180 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 12 treesize of output 8 [2021-06-12 19:56:40,181 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:40,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,184 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 13 treesize of output 9 [2021-06-12 19:56:40,185 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:40,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:40,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:56:40,189 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:40,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:40,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:40,255 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-06-12 19:56:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810124460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:40,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:40,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:40,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573805264] [2021-06-12 19:56:40,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:40,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:40,391 INFO L87 Difference]: Start difference. First operand 639 states and 1991 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:40,865 INFO L93 Difference]: Finished difference Result 1048 states and 3154 transitions. [2021-06-12 19:56:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:40,866 INFO L225 Difference]: With dead ends: 1048 [2021-06-12 19:56:40,867 INFO L226 Difference]: Without dead ends: 968 [2021-06-12 19:56:40,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-12 19:56:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 661. [2021-06-12 19:56:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 3.1484848484848484) internal successors, (2078), 660 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2078 transitions. [2021-06-12 19:56:40,874 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2078 transitions. Word has length 24 [2021-06-12 19:56:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:40,874 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 2078 transitions. [2021-06-12 19:56:40,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2078 transitions. [2021-06-12 19:56:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:40,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:40,875 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:41,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:41,076 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1647329100, now seen corresponding path program 77 times [2021-06-12 19:56:41,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:41,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441133626] [2021-06-12 19:56:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:41,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:41,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441133626] [2021-06-12 19:56:41,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441133626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936430582] [2021-06-12 19:56:41,230 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 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 19:56:41,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:41,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:41,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,330 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 18 treesize of output 14 [2021-06-12 19:56:41,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,334 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 18 treesize of output 14 [2021-06-12 19:56:41,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,385 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 19:56:41,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:41,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:41,437 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:56:41,522 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 19:56:41,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,526 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 20 treesize of output 16 [2021-06-12 19:56:41,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,530 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 19:56:41,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,534 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 20 treesize of output 16 [2021-06-12 19:56:41,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,539 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 20 treesize of output 16 [2021-06-12 19:56:41,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,543 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 19:56:41,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,547 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 20 treesize of output 16 [2021-06-12 19:56:41,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:41,552 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,555 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 19:56:41,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,703 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 19:56:41,703 INFO L628 ElimStorePlain]: treesize reduction 153, result has 48.5 percent of original size [2021-06-12 19:56:41,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,707 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 12 treesize of output 8 [2021-06-12 19:56:41,708 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:41,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,711 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 13 treesize of output 9 [2021-06-12 19:56:41,712 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:41,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:41,769 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:345, output treesize:81 [2021-06-12 19:56:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:41,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936430582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:41,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733162656] [2021-06-12 19:56:41,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:41,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:41,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:41,890 INFO L87 Difference]: Start difference. First operand 661 states and 2078 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:42,168 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-12 19:56:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:42,656 INFO L93 Difference]: Finished difference Result 1060 states and 3131 transitions. [2021-06-12 19:56:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:42,657 INFO L225 Difference]: With dead ends: 1060 [2021-06-12 19:56:42,657 INFO L226 Difference]: Without dead ends: 983 [2021-06-12 19:56:42,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-12 19:56:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 666. [2021-06-12 19:56:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.1548872180451126) internal successors, (2098), 665 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2098 transitions. [2021-06-12 19:56:42,665 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2098 transitions. Word has length 24 [2021-06-12 19:56:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:42,665 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2098 transitions. [2021-06-12 19:56:42,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2098 transitions. [2021-06-12 19:56:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:42,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:42,666 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:42,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-12 19:56:42,875 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash 470446420, now seen corresponding path program 78 times [2021-06-12 19:56:42,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:42,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243996932] [2021-06-12 19:56:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:43,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:43,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243996932] [2021-06-12 19:56:43,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243996932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767670830] [2021-06-12 19:56:43,047 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 19:56:43,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:43,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:43,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:43,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:56:43,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:56:43,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,245 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 19:56:43,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,248 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 19:56:43,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,277 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 11 treesize of output 7 [2021-06-12 19:56:43,278 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:43,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,280 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 7 [2021-06-12 19:56:43,281 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:43,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,304 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 19:56:43,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-12 19:56:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:43,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767670830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:43,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:43,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707512287] [2021-06-12 19:56:43,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:43,380 INFO L87 Difference]: Start difference. First operand 666 states and 2098 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:43,972 INFO L93 Difference]: Finished difference Result 903 states and 2773 transitions. [2021-06-12 19:56:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:43,973 INFO L225 Difference]: With dead ends: 903 [2021-06-12 19:56:43,973 INFO L226 Difference]: Without dead ends: 844 [2021-06-12 19:56:43,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-12 19:56:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 649. [2021-06-12 19:56:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1296296296296298) internal successors, (2028), 648 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2028 transitions. [2021-06-12 19:56:43,980 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2028 transitions. Word has length 24 [2021-06-12 19:56:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:43,981 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2028 transitions. [2021-06-12 19:56:43,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2028 transitions. [2021-06-12 19:56:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:43,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:43,981 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:44,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:44,196 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:44,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1416139284, now seen corresponding path program 79 times [2021-06-12 19:56:44,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:44,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502840364] [2021-06-12 19:56:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:44,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:44,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502840364] [2021-06-12 19:56:44,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502840364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435048511] [2021-06-12 19:56:44,382 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 19:56:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:44,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,476 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 19:56:44,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,480 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 19:56:44,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:44,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,489 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 19:56:44,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:44,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:44,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-12 19:56:44,747 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 19:56:44,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,750 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 20 treesize of output 16 [2021-06-12 19:56:44,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,754 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 20 treesize of output 16 [2021-06-12 19:56:44,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,758 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 19:56:44,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:44,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,844 INFO L628 ElimStorePlain]: treesize reduction 56, result has 64.3 percent of original size [2021-06-12 19:56:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,847 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 13 treesize of output 9 [2021-06-12 19:56:44,848 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:44,850 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 12 treesize of output 8 [2021-06-12 19:56:44,852 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:44,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:44,889 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 19:56:44,889 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:181, output treesize:47 [2021-06-12 19:56:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435048511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:44,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:44,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502449409] [2021-06-12 19:56:44,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:44,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:44,963 INFO L87 Difference]: Start difference. First operand 649 states and 2028 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:45,301 INFO L93 Difference]: Finished difference Result 756 states and 2337 transitions. [2021-06-12 19:56:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:45,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:45,303 INFO L225 Difference]: With dead ends: 756 [2021-06-12 19:56:45,303 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 19:56:45,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 19:56:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2021-06-12 19:56:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 3.1299694189602447) internal successors, (2047), 654 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 2047 transitions. [2021-06-12 19:56:45,309 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 2047 transitions. Word has length 24 [2021-06-12 19:56:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:45,309 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 2047 transitions. [2021-06-12 19:56:45,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 2047 transitions. [2021-06-12 19:56:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:45,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:45,310 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:45,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:45,510 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash 910497546, now seen corresponding path program 80 times [2021-06-12 19:56:45,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:45,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812678848] [2021-06-12 19:56:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:45,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812678848] [2021-06-12 19:56:45,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812678848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156150494] [2021-06-12 19:56:45,715 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 19:56:45,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:45,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,800 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 19:56:45,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,804 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 19:56:45,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,808 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 19 treesize of output 15 [2021-06-12 19:56:45,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,811 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 19:56:45,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:45,873 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-12 19:56:46,019 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 19:56:46,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,023 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 19:56:46,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:46,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,032 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 20 treesize of output 16 [2021-06-12 19:56:46,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:46,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,041 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 20 treesize of output 16 [2021-06-12 19:56:46,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,046 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 19:56:46,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,050 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 20 treesize of output 16 [2021-06-12 19:56:46,051 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,054 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 20 treesize of output 16 [2021-06-12 19:56:46,055 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,224 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-12 19:56:46,224 INFO L628 ElimStorePlain]: treesize reduction 168, result has 53.3 percent of original size [2021-06-12 19:56:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,228 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 11 treesize of output 7 [2021-06-12 19:56:46,229 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:46,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,232 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 13 treesize of output 9 [2021-06-12 19:56:46,233 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:46,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,237 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 8 [2021-06-12 19:56:46,238 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:46,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:46,310 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-12 19:56:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:46,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156150494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:46,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438881373] [2021-06-12 19:56:46,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:46,446 INFO L87 Difference]: Start difference. First operand 655 states and 2047 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:46,928 INFO L93 Difference]: Finished difference Result 872 states and 2650 transitions. [2021-06-12 19:56:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:46,929 INFO L225 Difference]: With dead ends: 872 [2021-06-12 19:56:46,929 INFO L226 Difference]: Without dead ends: 792 [2021-06-12 19:56:46,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-12 19:56:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 658. [2021-06-12 19:56:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.13089802130898) internal successors, (2057), 657 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2057 transitions. [2021-06-12 19:56:46,936 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2057 transitions. Word has length 24 [2021-06-12 19:56:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:46,936 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2057 transitions. [2021-06-12 19:56:46,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2057 transitions. [2021-06-12 19:56:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:46,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:46,937 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:47,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-12 19:56:47,137 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1784879286, now seen corresponding path program 81 times [2021-06-12 19:56:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:47,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556377335] [2021-06-12 19:56:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:47,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556377335] [2021-06-12 19:56:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556377335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279339230] [2021-06-12 19:56:47,348 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 19:56:47,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:47,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,433 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 19 treesize of output 15 [2021-06-12 19:56:47,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:56:47,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,441 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 19:56:47,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,444 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 19:56:47,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:47,505 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-12 19:56:47,651 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 19:56:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,655 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 20 treesize of output 16 [2021-06-12 19:56:47,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,660 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 19:56:47,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,664 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 20 treesize of output 16 [2021-06-12 19:56:47,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,669 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 19:56:47,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,673 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 19:56:47,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:47,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,682 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 20 treesize of output 16 [2021-06-12 19:56:47,683 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,686 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 19:56:47,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,855 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-12 19:56:47,855 INFO L628 ElimStorePlain]: treesize reduction 176, result has 51.1 percent of original size [2021-06-12 19:56:47,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,859 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 8 [2021-06-12 19:56:47,860 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:47,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:56:47,864 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:47,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:47,937 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-12 19:56:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:48,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279339230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:48,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:48,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557223459] [2021-06-12 19:56:48,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:48,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:48,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:48,067 INFO L87 Difference]: Start difference. First operand 658 states and 2057 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:48,661 INFO L93 Difference]: Finished difference Result 1021 states and 3010 transitions. [2021-06-12 19:56:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:48,662 INFO L225 Difference]: With dead ends: 1021 [2021-06-12 19:56:48,663 INFO L226 Difference]: Without dead ends: 899 [2021-06-12 19:56:48,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-06-12 19:56:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 669. [2021-06-12 19:56:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.155688622754491) internal successors, (2108), 668 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2108 transitions. [2021-06-12 19:56:48,670 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2108 transitions. Word has length 24 [2021-06-12 19:56:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:48,670 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2108 transitions. [2021-06-12 19:56:48,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2108 transitions. [2021-06-12 19:56:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:48,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:48,671 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:48,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:48,872 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1115351558, now seen corresponding path program 82 times [2021-06-12 19:56:48,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:48,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474918802] [2021-06-12 19:56:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:49,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:49,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474918802] [2021-06-12 19:56:49,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474918802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020828593] [2021-06-12 19:56:49,071 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 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 19:56:49,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:49,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,168 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 19:56:49,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,171 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 19:56:49,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,181 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 18 treesize of output 14 [2021-06-12 19:56:49,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,184 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 18 treesize of output 14 [2021-06-12 19:56:49,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:49,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 19:56:49,332 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 19:56:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,336 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 20 treesize of output 16 [2021-06-12 19:56:49,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,340 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 19 treesize of output 15 [2021-06-12 19:56:49,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,344 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 19:56:49,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,348 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 20 treesize of output 16 [2021-06-12 19:56:49,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,405 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 12 treesize of output 8 [2021-06-12 19:56:49,406 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,410 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 13 treesize of output 9 [2021-06-12 19:56:49,411 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,414 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 13 treesize of output 9 [2021-06-12 19:56:49,415 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,418 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 8 [2021-06-12 19:56:49,419 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:49,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:49,470 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-12 19:56:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:49,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020828593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:49,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:49,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896262371] [2021-06-12 19:56:49,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:49,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:49,607 INFO L87 Difference]: Start difference. First operand 669 states and 2108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:50,094 INFO L93 Difference]: Finished difference Result 989 states and 2995 transitions. [2021-06-12 19:56:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:50,095 INFO L225 Difference]: With dead ends: 989 [2021-06-12 19:56:50,095 INFO L226 Difference]: Without dead ends: 896 [2021-06-12 19:56:50,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 626.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-12 19:56:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 688. [2021-06-12 19:56:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.180494905385735) internal successors, (2185), 687 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2185 transitions. [2021-06-12 19:56:50,103 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2185 transitions. Word has length 24 [2021-06-12 19:56:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:50,103 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2185 transitions. [2021-06-12 19:56:50,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2185 transitions. [2021-06-12 19:56:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:50,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:50,104 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:50,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-12 19:56:50,304 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -341147188, now seen corresponding path program 83 times [2021-06-12 19:56:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:50,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620011667] [2021-06-12 19:56:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:50,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:50,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620011667] [2021-06-12 19:56:50,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620011667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639605895] [2021-06-12 19:56:50,545 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 19:56:50,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:50,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,626 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 17 treesize of output 13 [2021-06-12 19:56:50,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,629 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 18 treesize of output 14 [2021-06-12 19:56:50,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,650 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 19:56:50,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:56:50,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,715 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 19 treesize of output 15 [2021-06-12 19:56:50,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,718 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 19:56:50,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:50,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,754 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 11 treesize of output 7 [2021-06-12 19:56:50,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:50,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:50,757 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 11 treesize of output 7 [2021-06-12 19:56:50,758 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:50,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:50,784 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 19:56:50,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:31 [2021-06-12 19:56:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639605895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:50,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:56:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971555690] [2021-06-12 19:56:50,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:50,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:50,863 INFO L87 Difference]: Start difference. First operand 688 states and 2185 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:51,367 INFO L93 Difference]: Finished difference Result 835 states and 2626 transitions. [2021-06-12 19:56:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:56:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:51,368 INFO L225 Difference]: With dead ends: 835 [2021-06-12 19:56:51,368 INFO L226 Difference]: Without dead ends: 789 [2021-06-12 19:56:51,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-12 19:56:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 670. [2021-06-12 19:56:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1569506726457397) internal successors, (2112), 669 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2112 transitions. [2021-06-12 19:56:51,375 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2112 transitions. Word has length 24 [2021-06-12 19:56:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:51,375 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2112 transitions. [2021-06-12 19:56:51,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:56:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2112 transitions. [2021-06-12 19:56:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:51,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:51,376 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:51,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:51,577 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -927734326, now seen corresponding path program 84 times [2021-06-12 19:56:51,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:51,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217398644] [2021-06-12 19:56:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:51,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217398644] [2021-06-12 19:56:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217398644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130213274] [2021-06-12 19:56:51,709 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 19:56:51,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:51,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:56:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:51,780 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 19:56:51,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,782 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 18 treesize of output 14 [2021-06-12 19:56:51,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:51,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-12 19:56:51,904 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 19:56:51,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,906 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 19:56:51,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,919 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 11 treesize of output 7 [2021-06-12 19:56:51,920 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:51,922 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 11 treesize of output 7 [2021-06-12 19:56:51,923 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:51,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:51,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-12 19:56:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:56:51,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130213274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:51,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:51,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:56:51,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304485971] [2021-06-12 19:56:51,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:56:51,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:56:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:51,979 INFO L87 Difference]: Start difference. First operand 670 states and 2112 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:53,319 INFO L93 Difference]: Finished difference Result 1253 states and 3716 transitions. [2021-06-12 19:56:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:56:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:56:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:53,320 INFO L225 Difference]: With dead ends: 1253 [2021-06-12 19:56:53,321 INFO L226 Difference]: Without dead ends: 1153 [2021-06-12 19:56:53,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1242.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:56:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-12 19:56:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 726. [2021-06-12 19:56:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.1324137931034484) internal successors, (2271), 725 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2271 transitions. [2021-06-12 19:56:53,329 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2271 transitions. Word has length 24 [2021-06-12 19:56:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:53,330 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2271 transitions. [2021-06-12 19:56:53,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2271 transitions. [2021-06-12 19:56:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:53,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:53,331 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:53,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable715 [2021-06-12 19:56:53,537 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1264972752, now seen corresponding path program 85 times [2021-06-12 19:56:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:53,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420355652] [2021-06-12 19:56:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:53,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:53,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420355652] [2021-06-12 19:56:53,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420355652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612551470] [2021-06-12 19:56:53,690 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 19:56:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:53,761 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 17 treesize of output 13 [2021-06-12 19:56:53,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:53,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,766 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 18 treesize of output 14 [2021-06-12 19:56:53,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,769 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 18 treesize of output 14 [2021-06-12 19:56:53,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:53,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 19:56:53,901 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 37 treesize of output 29 [2021-06-12 19:56:53,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,903 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 37 treesize of output 29 [2021-06-12 19:56:53,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:53,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:53,914 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:56:53,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:53,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-06-12 19:56:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:53,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612551470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:53,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:56:53,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467635043] [2021-06-12 19:56:53,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:53,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:53,933 INFO L87 Difference]: Start difference. First operand 726 states and 2271 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 19:56:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:54,482 INFO L93 Difference]: Finished difference Result 1030 states and 3092 transitions. [2021-06-12 19:56:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:54,483 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 24 [2021-06-12 19:56:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:54,484 INFO L225 Difference]: With dead ends: 1030 [2021-06-12 19:56:54,484 INFO L226 Difference]: Without dead ends: 999 [2021-06-12 19:56:54,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-12 19:56:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2021-06-12 19:56:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.126530612244898) internal successors, (2298), 735 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2298 transitions. [2021-06-12 19:56:54,492 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2298 transitions. Word has length 24 [2021-06-12 19:56:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:54,492 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2298 transitions. [2021-06-12 19:56:54,492 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 19:56:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2298 transitions. [2021-06-12 19:56:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:54,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:54,493 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:54,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:54,693 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:54,694 INFO L82 PathProgramCache]: Analyzing trace with hash -472999064, now seen corresponding path program 86 times [2021-06-12 19:56:54,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:54,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175178152] [2021-06-12 19:56:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:54,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175178152] [2021-06-12 19:56:54,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175178152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977779172] [2021-06-12 19:56:54,841 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 19:56:54,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:54,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:54,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:54,909 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 17 treesize of output 13 [2021-06-12 19:56:54,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,912 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 17 treesize of output 13 [2021-06-12 19:56:54,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,914 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 18 treesize of output 14 [2021-06-12 19:56:54,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,916 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 18 treesize of output 14 [2021-06-12 19:56:54,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:54,941 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 19:56:55,031 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 19:56:55,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,035 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 20 treesize of output 16 [2021-06-12 19:56:55,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,037 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 20 treesize of output 16 [2021-06-12 19:56:55,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,040 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 19 treesize of output 15 [2021-06-12 19:56:55,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,084 INFO L628 ElimStorePlain]: treesize reduction 42, result has 60.0 percent of original size [2021-06-12 19:56:55,085 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 11 treesize of output 7 [2021-06-12 19:56:55,086 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:55,088 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 12 treesize of output 8 [2021-06-12 19:56:55,089 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:55,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:56:55,110 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:133, output treesize:47 [2021-06-12 19:56:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:55,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977779172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:55,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:55,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641411326] [2021-06-12 19:56:55,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:55,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:55,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:55,180 INFO L87 Difference]: Start difference. First operand 736 states and 2298 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:56,158 INFO L93 Difference]: Finished difference Result 1187 states and 3451 transitions. [2021-06-12 19:56:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:56:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:56,160 INFO L225 Difference]: With dead ends: 1187 [2021-06-12 19:56:56,160 INFO L226 Difference]: Without dead ends: 1056 [2021-06-12 19:56:56,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1009.8ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:56:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-12 19:56:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 738. [2021-06-12 19:56:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.130257801899593) internal successors, (2307), 737 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2307 transitions. [2021-06-12 19:56:56,168 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2307 transitions. Word has length 24 [2021-06-12 19:56:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:56,169 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2307 transitions. [2021-06-12 19:56:56,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2307 transitions. [2021-06-12 19:56:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:56,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:56,169 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:56,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:56,373 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:56,373 INFO L82 PathProgramCache]: Analyzing trace with hash -86455886, now seen corresponding path program 87 times [2021-06-12 19:56:56,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:56,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17714389] [2021-06-12 19:56:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:56,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:56,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17714389] [2021-06-12 19:56:56,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17714389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:56,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167452600] [2021-06-12 19:56:56,512 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 19:56:56,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:56,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:56,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,618 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 18 treesize of output 14 [2021-06-12 19:56:56,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:56,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:56:56,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-06-12 19:56:56,808 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:56:56,810 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 19:56:56,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,812 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 19 treesize of output 15 [2021-06-12 19:56:56,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,832 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 12 treesize of output 8 [2021-06-12 19:56:56,834 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:56,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,836 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 12 treesize of output 8 [2021-06-12 19:56:56,837 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:56,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,853 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 19:56:56,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 19:56:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:56,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167452600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:56,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:56,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:56,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832308017] [2021-06-12 19:56:56,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:56,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:56,901 INFO L87 Difference]: Start difference. First operand 738 states and 2307 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:58,145 INFO L93 Difference]: Finished difference Result 1180 states and 3520 transitions. [2021-06-12 19:56:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:58,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:56:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:58,146 INFO L225 Difference]: With dead ends: 1180 [2021-06-12 19:56:58,146 INFO L226 Difference]: Without dead ends: 1094 [2021-06-12 19:56:58,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1140.2ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:56:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-12 19:56:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 751. [2021-06-12 19:56:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1333333333333333) internal successors, (2350), 750 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2350 transitions. [2021-06-12 19:56:58,155 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2350 transitions. Word has length 24 [2021-06-12 19:56:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:58,155 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2350 transitions. [2021-06-12 19:56:58,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2350 transitions. [2021-06-12 19:56:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:56:58,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:58,156 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:58,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-12 19:56:58,356 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1824427702, now seen corresponding path program 88 times [2021-06-12 19:56:58,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953423327] [2021-06-12 19:56:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:58,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:58,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953423327] [2021-06-12 19:56:58,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953423327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:58,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973558781] [2021-06-12 19:56:58,515 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 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 19:56:58,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,626 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 17 treesize of output 13 [2021-06-12 19:56:58,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,629 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 19:56:58,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,672 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 18 treesize of output 14 [2021-06-12 19:56:58,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:56:58,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:56:58,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-12 19:56:58,904 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_334], 1=[o_0, v_prenex_333]} [2021-06-12 19:56:58,906 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 19:56:58,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,926 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 20 treesize of output 16 [2021-06-12 19:56:58,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,945 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 12 treesize of output 8 [2021-06-12 19:56:58,946 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:58,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,964 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 13 treesize of output 9 [2021-06-12 19:56:58,965 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:58,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,987 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 19:56:58,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-12 19:56:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:56:59,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973558781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:59,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:59,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:59,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491767625] [2021-06-12 19:56:59,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:59,052 INFO L87 Difference]: Start difference. First operand 751 states and 2350 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:00,182 INFO L93 Difference]: Finished difference Result 1303 states and 3866 transitions. [2021-06-12 19:57:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:00,183 INFO L225 Difference]: With dead ends: 1303 [2021-06-12 19:57:00,183 INFO L226 Difference]: Without dead ends: 1237 [2021-06-12 19:57:00,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1147.2ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:57:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-12 19:57:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 760. [2021-06-12 19:57:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.142292490118577) internal successors, (2385), 759 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2385 transitions. [2021-06-12 19:57:00,193 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2385 transitions. Word has length 24 [2021-06-12 19:57:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:00,193 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2385 transitions. [2021-06-12 19:57:00,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2385 transitions. [2021-06-12 19:57:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:00,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:00,194 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:00,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-12 19:57:00,394 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1004167502, now seen corresponding path program 89 times [2021-06-12 19:57:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:00,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540787738] [2021-06-12 19:57:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:00,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:00,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540787738] [2021-06-12 19:57:00,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540787738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:00,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694008236] [2021-06-12 19:57:00,595 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 19:57:00,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:00,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,701 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 18 treesize of output 14 [2021-06-12 19:57:00,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,717 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 17 treesize of output 13 [2021-06-12 19:57:00,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:57:00,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-06-12 19:57:00,808 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_338, o_4], 1=[o_0, v_prenex_337]} [2021-06-12 19:57:00,811 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 19:57:00,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,813 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 19 treesize of output 15 [2021-06-12 19:57:00,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,864 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 20 treesize of output 16 [2021-06-12 19:57:00,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,867 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 20 treesize of output 16 [2021-06-12 19:57:00,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:00,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,927 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 13 treesize of output 9 [2021-06-12 19:57:00,928 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:00,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,931 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 13 treesize of output 9 [2021-06-12 19:57:00,932 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:00,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:00,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,976 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 12 treesize of output 8 [2021-06-12 19:57:00,977 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:00,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:00,980 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 12 treesize of output 8 [2021-06-12 19:57:00,981 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:01,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:01,021 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-06-12 19:57:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:01,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694008236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:01,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452639280] [2021-06-12 19:57:01,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:01,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:01,155 INFO L87 Difference]: Start difference. First operand 760 states and 2385 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 19:57:01,681 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-12 19:57:01,883 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-12 19:57:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:02,372 INFO L93 Difference]: Finished difference Result 1238 states and 3694 transitions. [2021-06-12 19:57:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 24 [2021-06-12 19:57:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:02,374 INFO L225 Difference]: With dead ends: 1238 [2021-06-12 19:57:02,374 INFO L226 Difference]: Without dead ends: 1191 [2021-06-12 19:57:02,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1155.9ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-12 19:57:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 763. [2021-06-12 19:57:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.1509186351706036) internal successors, (2401), 762 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2401 transitions. [2021-06-12 19:57:02,383 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2401 transitions. Word has length 24 [2021-06-12 19:57:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:02,383 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2401 transitions. [2021-06-12 19:57:02,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 19:57:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2401 transitions. [2021-06-12 19:57:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:02,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:02,384 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:02,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:02,585 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash 861142106, now seen corresponding path program 90 times [2021-06-12 19:57:02,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:02,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246729558] [2021-06-12 19:57:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:02,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:02,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246729558] [2021-06-12 19:57:02,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246729558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124234994] [2021-06-12 19:57:02,690 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 19:57:02,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:02,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:02,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:02,762 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 24 treesize of output 18 [2021-06-12 19:57:02,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-06-12 19:57:02,824 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 28 treesize of output 22 [2021-06-12 19:57:02,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,826 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 28 treesize of output 22 [2021-06-12 19:57:02,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,841 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:02,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:02,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124234994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:02,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768267571] [2021-06-12 19:57:02,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:02,893 INFO L87 Difference]: Start difference. First operand 763 states and 2401 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:03,387 INFO L93 Difference]: Finished difference Result 1078 states and 3275 transitions. [2021-06-12 19:57:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:03,388 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 19:57:03,389 INFO L226 Difference]: Without dead ends: 961 [2021-06-12 19:57:03,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-06-12 19:57:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 784. [2021-06-12 19:57:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.1468710089399745) internal successors, (2464), 783 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2464 transitions. [2021-06-12 19:57:03,397 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2464 transitions. Word has length 24 [2021-06-12 19:57:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:03,397 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2464 transitions. [2021-06-12 19:57:03,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2464 transitions. [2021-06-12 19:57:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:03,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:03,398 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:03,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-12 19:57:03,598 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1487928400, now seen corresponding path program 91 times [2021-06-12 19:57:03,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:03,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887081835] [2021-06-12 19:57:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:03,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:03,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887081835] [2021-06-12 19:57:03,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887081835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6412820] [2021-06-12 19:57:03,751 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 19:57:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:03,866 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 24 treesize of output 18 [2021-06-12 19:57:03,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,869 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 24 treesize of output 18 [2021-06-12 19:57:03,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:03,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 19:57:03,948 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 28 treesize of output 22 [2021-06-12 19:57:03,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:03,953 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:03,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-12 19:57:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:03,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6412820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:03,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:03,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610410358] [2021-06-12 19:57:03,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:03,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:03,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:03,988 INFO L87 Difference]: Start difference. First operand 784 states and 2464 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 19:57:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:04,236 INFO L93 Difference]: Finished difference Result 922 states and 2849 transitions. [2021-06-12 19:57:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:04,237 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 24 [2021-06-12 19:57:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:04,238 INFO L225 Difference]: With dead ends: 922 [2021-06-12 19:57:04,238 INFO L226 Difference]: Without dead ends: 891 [2021-06-12 19:57:04,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-12 19:57:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 798. [2021-06-12 19:57:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.153074027603513) internal successors, (2513), 797 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2513 transitions. [2021-06-12 19:57:04,246 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2513 transitions. Word has length 24 [2021-06-12 19:57:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:04,246 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2513 transitions. [2021-06-12 19:57:04,246 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 19:57:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2513 transitions. [2021-06-12 19:57:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:04,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:04,247 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:04,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-12 19:57:04,447 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1222510578, now seen corresponding path program 92 times [2021-06-12 19:57:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:04,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205422116] [2021-06-12 19:57:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:04,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:04,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205422116] [2021-06-12 19:57:04,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205422116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:04,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098913669] [2021-06-12 19:57:04,564 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 19:57:04,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:04,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:04,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:04,650 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 24 treesize of output 18 [2021-06-12 19:57:04,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,653 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 24 treesize of output 18 [2021-06-12 19:57:04,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:04,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 19:57:04,710 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 28 treesize of output 22 [2021-06-12 19:57:04,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,729 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 28 treesize of output 22 [2021-06-12 19:57:04,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,751 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:04,752 INFO L518 ElimStorePlain]: Eliminatee v_prenex_340 vanished before elimination [2021-06-12 19:57:04,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:04,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:04,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098913669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:04,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:04,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625321385] [2021-06-12 19:57:04,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:04,819 INFO L87 Difference]: Start difference. First operand 798 states and 2513 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 19:57:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:05,110 INFO L93 Difference]: Finished difference Result 958 states and 2971 transitions. [2021-06-12 19:57:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:05,110 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 24 [2021-06-12 19:57:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:05,111 INFO L225 Difference]: With dead ends: 958 [2021-06-12 19:57:05,111 INFO L226 Difference]: Without dead ends: 927 [2021-06-12 19:57:05,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-12 19:57:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 791. [2021-06-12 19:57:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.1455696202531644) internal successors, (2485), 790 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2485 transitions. [2021-06-12 19:57:05,119 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2485 transitions. Word has length 24 [2021-06-12 19:57:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:05,119 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2485 transitions. [2021-06-12 19:57:05,119 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 19:57:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2485 transitions. [2021-06-12 19:57:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:05,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:05,120 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:05,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-12 19:57:05,320 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash -926285958, now seen corresponding path program 93 times [2021-06-12 19:57:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:05,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499369359] [2021-06-12 19:57:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:05,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499369359] [2021-06-12 19:57:05,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499369359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312336419] [2021-06-12 19:57:05,438 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 19:57:05,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:05,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:05,523 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 24 treesize of output 18 [2021-06-12 19:57:05,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:57:05,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:05,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:57:05,581 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 28 treesize of output 22 [2021-06-12 19:57:05,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,600 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:05,601 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 28 treesize of output 22 [2021-06-12 19:57:05,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_342 vanished before elimination [2021-06-12 19:57:05,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:05,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:05,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312336419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:05,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538694899] [2021-06-12 19:57:05,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:05,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:05,712 INFO L87 Difference]: Start difference. First operand 791 states and 2485 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 19:57:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:05,982 INFO L93 Difference]: Finished difference Result 991 states and 3050 transitions. [2021-06-12 19:57:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:05,982 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 24 [2021-06-12 19:57:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:05,983 INFO L225 Difference]: With dead ends: 991 [2021-06-12 19:57:05,983 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 19:57:05,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 19:57:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 788. [2021-06-12 19:57:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.147395171537484) internal successors, (2477), 787 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2477 transitions. [2021-06-12 19:57:05,991 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2477 transitions. Word has length 24 [2021-06-12 19:57:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:05,991 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2477 transitions. [2021-06-12 19:57:05,991 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 19:57:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2477 transitions. [2021-06-12 19:57:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:05,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:05,992 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:06,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-12 19:57:06,193 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1219447524, now seen corresponding path program 94 times [2021-06-12 19:57:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:06,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762327154] [2021-06-12 19:57:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:06,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:06,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762327154] [2021-06-12 19:57:06,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762327154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853659031] [2021-06-12 19:57:06,369 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 19:57:06,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:06,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:06,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,507 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 17 treesize of output 13 [2021-06-12 19:57:06,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,510 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 17 treesize of output 13 [2021-06-12 19:57:06,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:06,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,562 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 18 treesize of output 14 [2021-06-12 19:57:06,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,565 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 18 treesize of output 14 [2021-06-12 19:57:06,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:06,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:06,616 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:06,782 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:57:06,784 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 19 treesize of output 15 [2021-06-12 19:57:06,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,786 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 19 treesize of output 15 [2021-06-12 19:57:06,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,808 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-12 19:57:06,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,810 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 12 treesize of output 8 [2021-06-12 19:57:06,811 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:06,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:06,818 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 19:57:06,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-12 19:57:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853659031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:06,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:06,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041707756] [2021-06-12 19:57:06,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:06,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:06,852 INFO L87 Difference]: Start difference. First operand 788 states and 2477 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:07,486 INFO L93 Difference]: Finished difference Result 1036 states and 3129 transitions. [2021-06-12 19:57:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:07,487 INFO L225 Difference]: With dead ends: 1036 [2021-06-12 19:57:07,487 INFO L226 Difference]: Without dead ends: 950 [2021-06-12 19:57:07,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-12 19:57:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 806. [2021-06-12 19:57:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1503105590062113) internal successors, (2536), 805 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2536 transitions. [2021-06-12 19:57:07,496 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2536 transitions. Word has length 24 [2021-06-12 19:57:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:07,496 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2536 transitions. [2021-06-12 19:57:07,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2536 transitions. [2021-06-12 19:57:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:07,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:07,497 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:07,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:07,697 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1337547956, now seen corresponding path program 95 times [2021-06-12 19:57:07,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:07,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711679389] [2021-06-12 19:57:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:07,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:07,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711679389] [2021-06-12 19:57:07,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711679389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:07,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556265723] [2021-06-12 19:57:07,845 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 19:57:07,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:07,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:07,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:07,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:07,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,999 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 17 treesize of output 13 [2021-06-12 19:57:07,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,002 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 17 treesize of output 13 [2021-06-12 19:57:08,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,051 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 18 treesize of output 14 [2021-06-12 19:57:08,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,054 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 18 treesize of output 14 [2021-06-12 19:57:08,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:08,099 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:08,229 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_352], 1=[o_0, v_prenex_351]} [2021-06-12 19:57:08,231 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 19:57:08,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,252 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 20 treesize of output 16 [2021-06-12 19:57:08,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,271 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 12 treesize of output 8 [2021-06-12 19:57:08,272 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:08,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,290 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 13 treesize of output 9 [2021-06-12 19:57:08,291 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:08,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,319 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 19:57:08,319 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-12 19:57:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:08,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556265723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:08,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:08,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:08,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937858382] [2021-06-12 19:57:08,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:08,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:08,367 INFO L87 Difference]: Start difference. First operand 806 states and 2536 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:57:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:08,873 INFO L93 Difference]: Finished difference Result 1026 states and 3113 transitions. [2021-06-12 19:57:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 24 [2021-06-12 19:57:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:08,875 INFO L225 Difference]: With dead ends: 1026 [2021-06-12 19:57:08,875 INFO L226 Difference]: Without dead ends: 979 [2021-06-12 19:57:08,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-06-12 19:57:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 798. [2021-06-12 19:57:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.1543287327478042) internal successors, (2514), 797 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2514 transitions. [2021-06-12 19:57:08,883 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2514 transitions. Word has length 24 [2021-06-12 19:57:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:08,883 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2514 transitions. [2021-06-12 19:57:08,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:57:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2514 transitions. [2021-06-12 19:57:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:08,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:08,884 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:09,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-12 19:57:09,085 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1556843932, now seen corresponding path program 96 times [2021-06-12 19:57:09,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:09,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770526284] [2021-06-12 19:57:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770526284] [2021-06-12 19:57:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770526284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137379142] [2021-06-12 19:57:09,203 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 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 19:57:09,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:57:09,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:09,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,348 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 17 treesize of output 13 [2021-06-12 19:57:09,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,367 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 18 treesize of output 14 [2021-06-12 19:57:09,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:57:09,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:57:09,503 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:57:09,504 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 19 treesize of output 15 [2021-06-12 19:57:09,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,507 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 19 treesize of output 15 [2021-06-12 19:57:09,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,526 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 8 [2021-06-12 19:57:09,527 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:09,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:09,530 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:09,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,547 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 19:57:09,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 19:57:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:09,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137379142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:09,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824108514] [2021-06-12 19:57:09,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:09,604 INFO L87 Difference]: Start difference. First operand 798 states and 2514 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:10,429 INFO L93 Difference]: Finished difference Result 1071 states and 3259 transitions. [2021-06-12 19:57:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:10,430 INFO L225 Difference]: With dead ends: 1071 [2021-06-12 19:57:10,430 INFO L226 Difference]: Without dead ends: 989 [2021-06-12 19:57:10,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-12 19:57:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 809. [2021-06-12 19:57:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.157178217821782) internal successors, (2551), 808 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2551 transitions. [2021-06-12 19:57:10,439 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2551 transitions. Word has length 24 [2021-06-12 19:57:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:10,439 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2551 transitions. [2021-06-12 19:57:10,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2551 transitions. [2021-06-12 19:57:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:10,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:10,440 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:10,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-12 19:57:10,640 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash -476792548, now seen corresponding path program 97 times [2021-06-12 19:57:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:10,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204219219] [2021-06-12 19:57:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:10,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:10,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204219219] [2021-06-12 19:57:10,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204219219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:10,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552905553] [2021-06-12 19:57:10,789 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 19:57:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:10,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,929 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 19:57:10,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:10,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,980 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 18 treesize of output 14 [2021-06-12 19:57:10,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,983 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 18 treesize of output 14 [2021-06-12 19:57:10,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:11,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:11,186 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_360], 1=[o_0, v_prenex_359]} [2021-06-12 19:57:11,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:11,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,211 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 19:57:11,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,233 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 12 treesize of output 8 [2021-06-12 19:57:11,235 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:11,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,255 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 12 treesize of output 8 [2021-06-12 19:57:11,256 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:11,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:11,275 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 19:57:11,275 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552905553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:11,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:11,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939801269] [2021-06-12 19:57:11,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:11,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:11,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:11,340 INFO L87 Difference]: Start difference. First operand 809 states and 2551 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:12,092 INFO L93 Difference]: Finished difference Result 1156 states and 3533 transitions. [2021-06-12 19:57:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:12,093 INFO L225 Difference]: With dead ends: 1156 [2021-06-12 19:57:12,093 INFO L226 Difference]: Without dead ends: 1079 [2021-06-12 19:57:12,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 752.9ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-12 19:57:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 804. [2021-06-12 19:57:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.160647571606476) internal successors, (2538), 803 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2538 transitions. [2021-06-12 19:57:12,102 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2538 transitions. Word has length 24 [2021-06-12 19:57:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:12,102 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2538 transitions. [2021-06-12 19:57:12,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2538 transitions. [2021-06-12 19:57:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:12,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:12,103 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:12,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable799 [2021-06-12 19:57:12,303 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:12,303 INFO L82 PathProgramCache]: Analyzing trace with hash -650684718, now seen corresponding path program 98 times [2021-06-12 19:57:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:12,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519855751] [2021-06-12 19:57:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:12,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519855751] [2021-06-12 19:57:12,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519855751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229054362] [2021-06-12 19:57:12,504 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 19:57:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:12,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:12,591 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 19:57:12,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,594 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 18 treesize of output 14 [2021-06-12 19:57:12,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,596 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 18 treesize of output 14 [2021-06-12 19:57:12,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,599 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 17 treesize of output 13 [2021-06-12 19:57:12,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:12,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-12 19:57:12,681 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 19 treesize of output 15 [2021-06-12 19:57:12,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:12,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,800 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-12 19:57:12,800 INFO L628 ElimStorePlain]: treesize reduction 125, result has 55.8 percent of original size [2021-06-12 19:57:12,803 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 11 treesize of output 7 [2021-06-12 19:57:12,804 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:12,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,858 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 20 treesize of output 16 [2021-06-12 19:57:12,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,916 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 12 treesize of output 8 [2021-06-12 19:57:12,917 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:12,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,967 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 19:57:12,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,970 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 20 treesize of output 16 [2021-06-12 19:57:12,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,016 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 12 treesize of output 8 [2021-06-12 19:57:13,017 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:13,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,062 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 19 treesize of output 15 [2021-06-12 19:57:13,063 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,105 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 11 treesize of output 7 [2021-06-12 19:57:13,106 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:13,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:57:13,147 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:297, output treesize:96 [2021-06-12 19:57:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229054362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:13,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:13,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387211370] [2021-06-12 19:57:13,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:13,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:13,278 INFO L87 Difference]: Start difference. First operand 804 states and 2538 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:13,993 INFO L93 Difference]: Finished difference Result 1209 states and 3665 transitions. [2021-06-12 19:57:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:13,994 INFO L225 Difference]: With dead ends: 1209 [2021-06-12 19:57:13,994 INFO L226 Difference]: Without dead ends: 1121 [2021-06-12 19:57:13,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 841.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-12 19:57:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 808. [2021-06-12 19:57:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.171003717472119) internal successors, (2559), 807 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2559 transitions. [2021-06-12 19:57:14,003 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2559 transitions. Word has length 24 [2021-06-12 19:57:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:14,003 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2559 transitions. [2021-06-12 19:57:14,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2559 transitions. [2021-06-12 19:57:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:14,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:14,004 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:14,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable807,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:14,206 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1530958254, now seen corresponding path program 99 times [2021-06-12 19:57:14,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:14,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805830949] [2021-06-12 19:57:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:14,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:14,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805830949] [2021-06-12 19:57:14,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805830949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:14,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085269630] [2021-06-12 19:57:14,382 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 19:57:14,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:14,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,520 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 17 treesize of output 13 [2021-06-12 19:57:14,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,524 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 17 treesize of output 13 [2021-06-12 19:57:14,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,578 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 18 treesize of output 14 [2021-06-12 19:57:14,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,581 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 18 treesize of output 14 [2021-06-12 19:57:14,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:14,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:14,716 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_372, v_prenex_374, v_prenex_376], 1=[o_0, v_prenex_371, v_prenex_373, v_prenex_375]} [2021-06-12 19:57:14,719 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 19 treesize of output 15 [2021-06-12 19:57:14,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,769 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 19 treesize of output 15 [2021-06-12 19:57:14,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,817 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 20 treesize of output 16 [2021-06-12 19:57:14,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,863 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 20 treesize of output 16 [2021-06-12 19:57:14,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,908 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 12 treesize of output 8 [2021-06-12 19:57:14,909 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:14,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:14,958 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:14,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:14,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,999 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 13 treesize of output 9 [2021-06-12 19:57:15,000 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:15,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:15,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,040 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 13 treesize of output 9 [2021-06-12 19:57:15,042 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:15,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:15,079 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 19:57:15,079 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-12 19:57:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:15,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085269630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:15,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:15,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227519070] [2021-06-12 19:57:15,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:15,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:15,190 INFO L87 Difference]: Start difference. First operand 808 states and 2559 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:15,868 INFO L93 Difference]: Finished difference Result 1229 states and 3753 transitions. [2021-06-12 19:57:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:15,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:15,870 INFO L225 Difference]: With dead ends: 1229 [2021-06-12 19:57:15,870 INFO L226 Difference]: Without dead ends: 1191 [2021-06-12 19:57:15,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-12 19:57:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 808. [2021-06-12 19:57:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.174721189591078) internal successors, (2562), 807 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2562 transitions. [2021-06-12 19:57:15,879 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2562 transitions. Word has length 24 [2021-06-12 19:57:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:15,879 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2562 transitions. [2021-06-12 19:57:15,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2562 transitions. [2021-06-12 19:57:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:15,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:15,881 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:16,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable813 [2021-06-12 19:57:16,081 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1628306326, now seen corresponding path program 100 times [2021-06-12 19:57:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:16,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242507383] [2021-06-12 19:57:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:16,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:16,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242507383] [2021-06-12 19:57:16,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242507383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183273811] [2021-06-12 19:57:16,207 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 19:57:16,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:16,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:16,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:16,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,370 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 17 treesize of output 13 [2021-06-12 19:57:16,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,372 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 19:57:16,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,394 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 19:57:16,394 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:57:16,482 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_380, o_4], 1=[o_0, v_prenex_379]} [2021-06-12 19:57:16,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:16,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,508 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 19 treesize of output 15 [2021-06-12 19:57:16,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,530 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 12 treesize of output 8 [2021-06-12 19:57:16,531 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:16,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:16,553 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:16,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,571 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 19:57:16,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:16,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183273811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:16,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:16,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993007882] [2021-06-12 19:57:16,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:16,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:16,641 INFO L87 Difference]: Start difference. First operand 808 states and 2562 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 19:57:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:17,019 INFO L93 Difference]: Finished difference Result 1051 states and 3264 transitions. [2021-06-12 19:57:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:17,019 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 24 [2021-06-12 19:57:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:17,020 INFO L225 Difference]: With dead ends: 1051 [2021-06-12 19:57:17,020 INFO L226 Difference]: Without dead ends: 1013 [2021-06-12 19:57:17,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-12 19:57:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 815. [2021-06-12 19:57:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.173218673218673) internal successors, (2583), 814 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call 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 815 states to 815 states and 2583 transitions. [2021-06-12 19:57:17,029 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2583 transitions. Word has length 24 [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 815 states and 2583 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 815 states and 2583 transitions. [2021-06-12 19:57:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [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 [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:17,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable821,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:17,243 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -147330124, now seen corresponding path program 101 times [2021-06-12 19:57:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:17,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654429561] [2021-06-12 19:57:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:17,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:17,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654429561] [2021-06-12 19:57:17,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654429561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429929960] [2021-06-12 19:57:17,420 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 19:57:17,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:17,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:17,605 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 19:57:17,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:17,608 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 19:57:17,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:17,635 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 19:57:17,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:57:17,692 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_384], 1=[o_2, v_prenex_383]} [2021-06-12 19:57:17,695 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 19 treesize of output 15 [2021-06-12 19:57:17,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,699 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 19:57:17,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,765 INFO L628 ElimStorePlain]: treesize reduction 89, result has 41.8 percent of original size [2021-06-12 19:57:17,767 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 19:57:17,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:17,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:17,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:17,794 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 8 [2021-06-12 19:57:17,795 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:17,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:17,818 INFO L518 ElimStorePlain]: Eliminatee v_prenex_383 vanished before elimination [2021-06-12 19:57:17,819 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 19:57:17,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-06-12 19:57:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:17,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429929960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:17,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:17,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726433851] [2021-06-12 19:57:17,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:17,892 INFO L87 Difference]: Start difference. First operand 815 states and 2583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:18,481 INFO L93 Difference]: Finished difference Result 1189 states and 3624 transitions. [2021-06-12 19:57:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:18,483 INFO L225 Difference]: With dead ends: 1189 [2021-06-12 19:57:18,483 INFO L226 Difference]: Without dead ends: 1073 [2021-06-12 19:57:18,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 648.7ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-06-12 19:57:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 815. [2021-06-12 19:57:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.173218673218673) internal successors, (2583), 814 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2583 transitions. [2021-06-12 19:57:18,492 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2583 transitions. Word has length 24 [2021-06-12 19:57:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:18,492 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2583 transitions. [2021-06-12 19:57:18,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2583 transitions. [2021-06-12 19:57:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:18,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:18,493 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:18,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:18,695 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 483874378, now seen corresponding path program 102 times [2021-06-12 19:57:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:18,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235761060] [2021-06-12 19:57:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:18,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:18,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235761060] [2021-06-12 19:57:18,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235761060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258429631] [2021-06-12 19:57:18,884 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 19:57:18,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:18,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,031 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 18 treesize of output 14 [2021-06-12 19:57:19,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:57:19,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,085 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 19:57:19,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,088 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 19:57:19,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:19,134 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:19,225 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_390, v_prenex_392, o_4, v_prenex_394], 1=[o_2, v_prenex_391, v_prenex_393, v_prenex_389]} [2021-06-12 19:57:19,228 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 20 treesize of output 16 [2021-06-12 19:57:19,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,278 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 19:57:19,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,326 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 20 treesize of output 16 [2021-06-12 19:57:19,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,372 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 19 treesize of output 15 [2021-06-12 19:57:19,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,417 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 13 treesize of output 9 [2021-06-12 19:57:19,418 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:19,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,461 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 12 treesize of output 8 [2021-06-12 19:57:19,462 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:19,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,505 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 12 treesize of output 8 [2021-06-12 19:57:19,506 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:19,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,547 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 13 treesize of output 9 [2021-06-12 19:57:19,549 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:19,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,588 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 19:57:19,588 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-12 19:57:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:19,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258429631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:19,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:19,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447419398] [2021-06-12 19:57:19,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:19,732 INFO L87 Difference]: Start difference. First operand 815 states and 2583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:20,505 INFO L93 Difference]: Finished difference Result 1295 states and 3943 transitions. [2021-06-12 19:57:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:20,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:20,507 INFO L225 Difference]: With dead ends: 1295 [2021-06-12 19:57:20,507 INFO L226 Difference]: Without dead ends: 1202 [2021-06-12 19:57:20,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-06-12 19:57:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 826. [2021-06-12 19:57:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.187878787878788) internal successors, (2630), 825 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2630 transitions. [2021-06-12 19:57:20,516 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2630 transitions. Word has length 24 [2021-06-12 19:57:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:20,517 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2630 transitions. [2021-06-12 19:57:20,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2630 transitions. [2021-06-12 19:57:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:20,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:20,518 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:20,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:20,718 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:20,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1258078748, now seen corresponding path program 103 times [2021-06-12 19:57:20,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:20,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061713996] [2021-06-12 19:57:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:20,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:20,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061713996] [2021-06-12 19:57:20,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061713996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213244023] [2021-06-12 19:57:20,897 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 19:57:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,036 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 18 treesize of output 14 [2021-06-12 19:57:21,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,039 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 18 treesize of output 14 [2021-06-12 19:57:21,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,089 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 17 treesize of output 13 [2021-06-12 19:57:21,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:21,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:21,137 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:21,255 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_400], 1=[o_2, v_prenex_399]} [2021-06-12 19:57:21,257 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 19 treesize of output 15 [2021-06-12 19:57:21,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,260 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 19 treesize of output 15 [2021-06-12 19:57:21,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,318 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-12 19:57:21,321 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 19:57:21,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:21,347 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:21,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,371 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 12 treesize of output 8 [2021-06-12 19:57:21,372 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:21,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,393 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 19:57:21,393 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-06-12 19:57:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:21,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213244023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:21,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:21,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154867224] [2021-06-12 19:57:21,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:21,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:21,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:21,472 INFO L87 Difference]: Start difference. First operand 826 states and 2630 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:22,379 INFO L93 Difference]: Finished difference Result 1381 states and 4180 transitions. [2021-06-12 19:57:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:22,381 INFO L225 Difference]: With dead ends: 1381 [2021-06-12 19:57:22,381 INFO L226 Difference]: Without dead ends: 1234 [2021-06-12 19:57:22,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 909.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-12 19:57:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 854. [2021-06-12 19:57:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.2227432590855805) internal successors, (2749), 853 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2749 transitions. [2021-06-12 19:57:22,391 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2749 transitions. Word has length 24 [2021-06-12 19:57:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:22,391 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2749 transitions. [2021-06-12 19:57:22,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2749 transitions. [2021-06-12 19:57:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:22,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:22,392 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:22,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:22,594 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash -207061268, now seen corresponding path program 104 times [2021-06-12 19:57:22,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:22,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805450861] [2021-06-12 19:57:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:22,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:22,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805450861] [2021-06-12 19:57:22,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805450861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:22,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556143901] [2021-06-12 19:57:22,702 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 19:57:22,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:22,766 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 24 treesize of output 18 [2021-06-12 19:57:22,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,769 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 24 treesize of output 18 [2021-06-12 19:57:22,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:22,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:22,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 19:57:22,869 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 28 treesize of output 22 [2021-06-12 19:57:22,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:22,875 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:22,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:22,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-12 19:57:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:22,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556143901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:22,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:22,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:22,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840740719] [2021-06-12 19:57:22,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:22,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:22,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:22,912 INFO L87 Difference]: Start difference. First operand 854 states and 2749 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 19:57:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:23,181 INFO L93 Difference]: Finished difference Result 1188 states and 3717 transitions. [2021-06-12 19:57:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:23,181 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 24 [2021-06-12 19:57:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:23,183 INFO L225 Difference]: With dead ends: 1188 [2021-06-12 19:57:23,183 INFO L226 Difference]: Without dead ends: 1169 [2021-06-12 19:57:23,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-12 19:57:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 858. [2021-06-12 19:57:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.221703617269545) internal successors, (2761), 857 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2761 transitions. [2021-06-12 19:57:23,192 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2761 transitions. Word has length 24 [2021-06-12 19:57:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:23,192 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2761 transitions. [2021-06-12 19:57:23,192 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 19:57:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2761 transitions. [2021-06-12 19:57:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:23,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:23,193 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:23,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-12 19:57:23,394 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1180926164, now seen corresponding path program 105 times [2021-06-12 19:57:23,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:23,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930859853] [2021-06-12 19:57:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:23,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:23,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930859853] [2021-06-12 19:57:23,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930859853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882389027] [2021-06-12 19:57:23,582 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 19:57:23,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:23,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:23,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:23,640 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 24 treesize of output 18 [2021-06-12 19:57:23,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-06-12 19:57:23,698 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 28 treesize of output 22 [2021-06-12 19:57:23,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,700 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 28 treesize of output 22 [2021-06-12 19:57:23,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,714 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:23,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:23,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:23,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882389027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:23,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:23,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342403527] [2021-06-12 19:57:23,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:23,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:23,765 INFO L87 Difference]: Start difference. First operand 858 states and 2761 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 19:57:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:24,237 INFO L93 Difference]: Finished difference Result 1262 states and 3894 transitions. [2021-06-12 19:57:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:24,237 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 24 [2021-06-12 19:57:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:24,239 INFO L225 Difference]: With dead ends: 1262 [2021-06-12 19:57:24,239 INFO L226 Difference]: Without dead ends: 1171 [2021-06-12 19:57:24,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-12 19:57:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 842. [2021-06-12 19:57:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.211652794292509) internal successors, (2701), 841 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2701 transitions. [2021-06-12 19:57:24,248 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2701 transitions. Word has length 24 [2021-06-12 19:57:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:24,248 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2701 transitions. [2021-06-12 19:57:24,248 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 19:57:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2701 transitions. [2021-06-12 19:57:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:24,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:24,249 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:24,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:24,449 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash 59669154, now seen corresponding path program 106 times [2021-06-12 19:57:24,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:24,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183727726] [2021-06-12 19:57:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:24,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183727726] [2021-06-12 19:57:24,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183727726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000305935] [2021-06-12 19:57:24,612 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 19:57:24,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:24,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:24,703 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 24 treesize of output 18 [2021-06-12 19:57:24,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,705 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 24 treesize of output 18 [2021-06-12 19:57:24,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:24,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:24,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:57:24,771 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 28 treesize of output 22 [2021-06-12 19:57:24,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:24,789 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:24,790 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 28 treesize of output 22 [2021-06-12 19:57:24,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:24,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:24,807 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-06-12 19:57:24,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:24,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:24,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000305935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:24,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:24,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075152219] [2021-06-12 19:57:24,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:24,891 INFO L87 Difference]: Start difference. First operand 842 states and 2701 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 19:57:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:25,197 INFO L93 Difference]: Finished difference Result 1068 states and 3338 transitions. [2021-06-12 19:57:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:25,197 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 24 [2021-06-12 19:57:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:25,198 INFO L225 Difference]: With dead ends: 1068 [2021-06-12 19:57:25,198 INFO L226 Difference]: Without dead ends: 1030 [2021-06-12 19:57:25,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-12 19:57:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 830. [2021-06-12 19:57:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.186972255729795) internal successors, (2642), 829 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2642 transitions. [2021-06-12 19:57:25,207 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2642 transitions. Word has length 24 [2021-06-12 19:57:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:25,207 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2642 transitions. [2021-06-12 19:57:25,207 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 19:57:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2642 transitions. [2021-06-12 19:57:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:25,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:25,213 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:25,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable860,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:25,413 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:25,414 INFO L82 PathProgramCache]: Analyzing trace with hash -214353972, now seen corresponding path program 107 times [2021-06-12 19:57:25,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:25,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720468767] [2021-06-12 19:57:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:25,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:25,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720468767] [2021-06-12 19:57:25,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720468767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263547664] [2021-06-12 19:57:25,556 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 19:57:25,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:57:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:25,648 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 24 treesize of output 18 [2021-06-12 19:57:25,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,650 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 24 treesize of output 18 [2021-06-12 19:57:25,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:25,669 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:57:25,707 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 28 treesize of output 22 [2021-06-12 19:57:25,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,710 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 28 treesize of output 22 [2021-06-12 19:57:25,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,758 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-12 19:57:25,759 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 28 treesize of output 22 [2021-06-12 19:57:25,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,779 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:25,779 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-12 19:57:25,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:25,779 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-06-12 19:57:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:25,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263547664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:25,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:25,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429865749] [2021-06-12 19:57:25,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:25,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:25,860 INFO L87 Difference]: Start difference. First operand 830 states and 2642 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 19:57:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:26,436 INFO L93 Difference]: Finished difference Result 1198 states and 3666 transitions. [2021-06-12 19:57:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:26,436 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 24 [2021-06-12 19:57:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:26,437 INFO L225 Difference]: With dead ends: 1198 [2021-06-12 19:57:26,438 INFO L226 Difference]: Without dead ends: 1082 [2021-06-12 19:57:26,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-12 19:57:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 804. [2021-06-12 19:57:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.151930261519303) internal successors, (2531), 803 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2531 transitions. [2021-06-12 19:57:26,446 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2531 transitions. Word has length 24 [2021-06-12 19:57:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:26,446 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2531 transitions. [2021-06-12 19:57:26,446 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 19:57:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2531 transitions. [2021-06-12 19:57:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:26,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:26,447 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:26,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:26,661 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -699816630, now seen corresponding path program 108 times [2021-06-12 19:57:26,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:26,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122808793] [2021-06-12 19:57:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:26,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122808793] [2021-06-12 19:57:26,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122808793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507778532] [2021-06-12 19:57:26,771 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 19:57:26,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:26,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:26,843 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 24 treesize of output 18 [2021-06-12 19:57:26,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,846 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 24 treesize of output 18 [2021-06-12 19:57:26,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:26,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:26,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 19:57:26,921 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 28 treesize of output 22 [2021-06-12 19:57:26,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:57:26,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,940 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-12 19:57:26,940 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:26,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:26,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-06-12 19:57:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:26,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507778532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:26,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:57:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461221063] [2021-06-12 19:57:26,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:26,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:26,975 INFO L87 Difference]: Start difference. First operand 804 states and 2531 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 19:57:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:27,334 INFO L93 Difference]: Finished difference Result 992 states and 3065 transitions. [2021-06-12 19:57:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:27,335 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 24 [2021-06-12 19:57:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:27,336 INFO L225 Difference]: With dead ends: 992 [2021-06-12 19:57:27,336 INFO L226 Difference]: Without dead ends: 933 [2021-06-12 19:57:27,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-06-12 19:57:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 831. [2021-06-12 19:57:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.146987951807229) internal successors, (2612), 830 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2612 transitions. [2021-06-12 19:57:27,344 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2612 transitions. Word has length 24 [2021-06-12 19:57:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:27,344 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2612 transitions. [2021-06-12 19:57:27,344 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 19:57:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2612 transitions. [2021-06-12 19:57:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:27,345 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:27,345 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:27,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:27,545 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash -965234452, now seen corresponding path program 109 times [2021-06-12 19:57:27,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:27,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21700160] [2021-06-12 19:57:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21700160] [2021-06-12 19:57:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21700160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299752336] [2021-06-12 19:57:27,642 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 19:57:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:27,712 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 24 treesize of output 18 [2021-06-12 19:57:27,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,715 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 24 treesize of output 18 [2021-06-12 19:57:27,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:27,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 19:57:27,770 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 28 treesize of output 22 [2021-06-12 19:57:27,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,789 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 28 treesize of output 22 [2021-06-12 19:57:27,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,806 INFO L518 ElimStorePlain]: Eliminatee v_prenex_406 vanished before elimination [2021-06-12 19:57:27,806 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:27,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:27,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:27,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299752336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:27,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:57:27,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792024724] [2021-06-12 19:57:27,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:27,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:27,873 INFO L87 Difference]: Start difference. First operand 831 states and 2612 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 19:57:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:28,292 INFO L93 Difference]: Finished difference Result 1078 states and 3280 transitions. [2021-06-12 19:57:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:28,292 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 24 [2021-06-12 19:57:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:28,293 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 19:57:28,294 INFO L226 Difference]: Without dead ends: 1001 [2021-06-12 19:57:28,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-06-12 19:57:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 824. [2021-06-12 19:57:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.1482381530984203) internal successors, (2591), 823 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2591 transitions. [2021-06-12 19:57:28,302 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2591 transitions. Word has length 24 [2021-06-12 19:57:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:28,302 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2591 transitions. [2021-06-12 19:57:28,302 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 19:57:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2591 transitions. [2021-06-12 19:57:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:28,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:28,303 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:28,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable878 [2021-06-12 19:57:28,503 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1180936308, now seen corresponding path program 110 times [2021-06-12 19:57:28,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:28,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858398676] [2021-06-12 19:57:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:28,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:28,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858398676] [2021-06-12 19:57:28,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858398676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95310635] [2021-06-12 19:57:28,605 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 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 19:57:28,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:28,677 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 24 treesize of output 18 [2021-06-12 19:57:28,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,679 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 24 treesize of output 18 [2021-06-12 19:57:28,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:28,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:28,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 19:57:28,739 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 28 treesize of output 22 [2021-06-12 19:57:28,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,742 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 28 treesize of output 22 [2021-06-12 19:57:28,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,789 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-12 19:57:28,791 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 28 treesize of output 22 [2021-06-12 19:57:28,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:28,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:28,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-06-12 19:57:28,810 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:28,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:28,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-06-12 19:57:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:28,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95310635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:28,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:57:28,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423772391] [2021-06-12 19:57:28,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:57:28,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:57:28,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:57:28,875 INFO L87 Difference]: Start difference. First operand 824 states and 2591 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 19:57:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:29,322 INFO L93 Difference]: Finished difference Result 1236 states and 3723 transitions. [2021-06-12 19:57:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:29,323 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 24 [2021-06-12 19:57:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:29,324 INFO L225 Difference]: With dead ends: 1236 [2021-06-12 19:57:29,324 INFO L226 Difference]: Without dead ends: 1114 [2021-06-12 19:57:29,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 405.6ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-12 19:57:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 824. [2021-06-12 19:57:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.1482381530984203) internal successors, (2591), 823 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2591 transitions. [2021-06-12 19:57:29,333 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2591 transitions. Word has length 24 [2021-06-12 19:57:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:29,333 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2591 transitions. [2021-06-12 19:57:29,333 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 19:57:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2591 transitions. [2021-06-12 19:57:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:29,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:29,334 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:29,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-12 19:57:29,535 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1687282574, now seen corresponding path program 111 times [2021-06-12 19:57:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:29,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017926904] [2021-06-12 19:57:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:29,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:29,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017926904] [2021-06-12 19:57:29,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017926904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132633718] [2021-06-12 19:57:29,718 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 19:57:29,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:29,784 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 24 treesize of output 18 [2021-06-12 19:57:29,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,786 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 24 treesize of output 18 [2021-06-12 19:57:29,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:29,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:29,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 19:57:29,860 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 28 treesize of output 22 [2021-06-12 19:57:29,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,862 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 28 treesize of output 22 [2021-06-12 19:57:29,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:29,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:29,879 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:29,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:29,880 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:29,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132633718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:29,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:29,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822111224] [2021-06-12 19:57:29,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:29,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:29,963 INFO L87 Difference]: Start difference. First operand 824 states and 2591 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 19:57:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:30,278 INFO L93 Difference]: Finished difference Result 1282 states and 3980 transitions. [2021-06-12 19:57:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:30,278 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 24 [2021-06-12 19:57:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:30,280 INFO L225 Difference]: With dead ends: 1282 [2021-06-12 19:57:30,280 INFO L226 Difference]: Without dead ends: 1220 [2021-06-12 19:57:30,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-12 19:57:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 864. [2021-06-12 19:57:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.1402085747392814) internal successors, (2710), 863 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2710 transitions. [2021-06-12 19:57:30,289 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2710 transitions. Word has length 24 [2021-06-12 19:57:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:30,289 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2710 transitions. [2021-06-12 19:57:30,290 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 19:57:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2710 transitions. [2021-06-12 19:57:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:30,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:30,291 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:30,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-12 19:57:30,492 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1829849452, now seen corresponding path program 112 times [2021-06-12 19:57:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:30,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070994579] [2021-06-12 19:57:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:30,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070994579] [2021-06-12 19:57:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070994579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851753478] [2021-06-12 19:57:30,663 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 19:57:30,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:30,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,824 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 17 treesize of output 13 [2021-06-12 19:57:30,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:30,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,876 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 18 treesize of output 14 [2021-06-12 19:57:30,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,879 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 18 treesize of output 14 [2021-06-12 19:57:30,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:30,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:31,089 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:57:31,091 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 19:57:31,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:31,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:31,113 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-12 19:57:31,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:31,116 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:31,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:31,123 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 19:57:31,123 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-12 19:57:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:31,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851753478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:31,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:31,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808954294] [2021-06-12 19:57:31,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:31,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:31,157 INFO L87 Difference]: Start difference. First operand 864 states and 2710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:31,825 INFO L93 Difference]: Finished difference Result 1105 states and 3339 transitions. [2021-06-12 19:57:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:31,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:31,826 INFO L225 Difference]: With dead ends: 1105 [2021-06-12 19:57:31,826 INFO L226 Difference]: Without dead ends: 1019 [2021-06-12 19:57:31,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 785.8ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:31,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-12 19:57:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 892. [2021-06-12 19:57:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.143658810325477) internal successors, (2801), 891 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2801 transitions. [2021-06-12 19:57:31,835 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2801 transitions. Word has length 24 [2021-06-12 19:57:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:31,835 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2801 transitions. [2021-06-12 19:57:31,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2801 transitions. [2021-06-12 19:57:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:31,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:31,837 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:32,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-12 19:57:32,041 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:32,041 INFO L82 PathProgramCache]: Analyzing trace with hash 727146028, now seen corresponding path program 113 times [2021-06-12 19:57:32,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:32,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205759575] [2021-06-12 19:57:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:32,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205759575] [2021-06-12 19:57:32,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205759575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203167524] [2021-06-12 19:57:32,178 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 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 19:57:32,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:32,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:32,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:32,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:32,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,319 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 19:57:32,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,367 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 18 treesize of output 14 [2021-06-12 19:57:32,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,370 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 18 treesize of output 14 [2021-06-12 19:57:32,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:32,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:32,543 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_418, o_4], 1=[o_0, v_prenex_417]} [2021-06-12 19:57:32,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:32,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,566 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 20 treesize of output 16 [2021-06-12 19:57:32,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,585 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 13 treesize of output 9 [2021-06-12 19:57:32,586 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:32,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,604 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 12 treesize of output 8 [2021-06-12 19:57:32,605 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:32,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,621 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 19:57:32,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-12 19:57:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:32,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203167524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:32,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:57:32,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080693121] [2021-06-12 19:57:32,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:32,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:32,678 INFO L87 Difference]: Start difference. First operand 892 states and 2801 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:57:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:33,222 INFO L93 Difference]: Finished difference Result 1127 states and 3403 transitions. [2021-06-12 19:57:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 24 [2021-06-12 19:57:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:33,223 INFO L225 Difference]: With dead ends: 1127 [2021-06-12 19:57:33,223 INFO L226 Difference]: Without dead ends: 1080 [2021-06-12 19:57:33,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-06-12 19:57:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 886. [2021-06-12 19:57:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.1480225988700563) internal successors, (2786), 885 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2786 transitions. [2021-06-12 19:57:33,232 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2786 transitions. Word has length 24 [2021-06-12 19:57:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:33,232 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2786 transitions. [2021-06-12 19:57:33,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:57:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2786 transitions. [2021-06-12 19:57:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:33,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:33,233 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:33,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:33,434 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash 946442004, now seen corresponding path program 114 times [2021-06-12 19:57:33,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:33,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980788540] [2021-06-12 19:57:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:33,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980788540] [2021-06-12 19:57:33,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980788540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576625144] [2021-06-12 19:57:33,579 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 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 19:57:33,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:57:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,724 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 19:57:33,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:57:33,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:57:33,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:57:33,862 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:57:33,864 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 19:57:33,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,866 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 19 treesize of output 15 [2021-06-12 19:57:33,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,887 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 12 treesize of output 8 [2021-06-12 19:57:33,888 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:33,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,890 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 12 treesize of output 8 [2021-06-12 19:57:33,891 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:33,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,907 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 19:57:33,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 19:57:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:33,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576625144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:33,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:33,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59539537] [2021-06-12 19:57:33,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:33,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:33,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:33,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:33,955 INFO L87 Difference]: Start difference. First operand 886 states and 2786 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:34,785 INFO L93 Difference]: Finished difference Result 1170 states and 3538 transitions. [2021-06-12 19:57:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:34,787 INFO L225 Difference]: With dead ends: 1170 [2021-06-12 19:57:34,787 INFO L226 Difference]: Without dead ends: 1088 [2021-06-12 19:57:34,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-12 19:57:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 897. [2021-06-12 19:57:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.150669642857143) internal successors, (2823), 896 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2823 transitions. [2021-06-12 19:57:34,797 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2823 transitions. Word has length 24 [2021-06-12 19:57:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:34,797 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2823 transitions. [2021-06-12 19:57:34,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2823 transitions. [2021-06-12 19:57:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:34,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:34,798 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:35,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:35,017 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1087194476, now seen corresponding path program 115 times [2021-06-12 19:57:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:35,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113165901] [2021-06-12 19:57:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:35,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:35,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113165901] [2021-06-12 19:57:35,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113165901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208265347] [2021-06-12 19:57:35,169 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 19:57:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:35,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,307 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 19:57:35,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,310 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 17 treesize of output 13 [2021-06-12 19:57:35,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,359 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 18 treesize of output 14 [2021-06-12 19:57:35,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:57:35,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:35,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:35,563 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_426, o_4], 1=[o_0, v_prenex_425]} [2021-06-12 19:57:35,565 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 19 treesize of output 15 [2021-06-12 19:57:35,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,588 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 19 treesize of output 15 [2021-06-12 19:57:35,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:35,611 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:35,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,632 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 12 treesize of output 8 [2021-06-12 19:57:35,633 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:35,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,651 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 19:57:35,651 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:35,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208265347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:35,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891054373] [2021-06-12 19:57:35,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:35,716 INFO L87 Difference]: Start difference. First operand 897 states and 2823 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:36,565 INFO L93 Difference]: Finished difference Result 1242 states and 3774 transitions. [2021-06-12 19:57:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:36,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:36,566 INFO L225 Difference]: With dead ends: 1242 [2021-06-12 19:57:36,566 INFO L226 Difference]: Without dead ends: 1165 [2021-06-12 19:57:36,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 848.5ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-12 19:57:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 892. [2021-06-12 19:57:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.153759820426487) internal successors, (2810), 891 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2810 transitions. [2021-06-12 19:57:36,576 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2810 transitions. Word has length 24 [2021-06-12 19:57:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:36,576 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2810 transitions. [2021-06-12 19:57:36,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2810 transitions. [2021-06-12 19:57:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:36,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:36,577 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:36,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable914 [2021-06-12 19:57:36,777 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1261086646, now seen corresponding path program 116 times [2021-06-12 19:57:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:36,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687574954] [2021-06-12 19:57:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:36,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687574954] [2021-06-12 19:57:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687574954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548689956] [2021-06-12 19:57:36,974 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 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 19:57:37,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:37,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:37,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:57:37,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:57:37,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,180 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 19:57:37,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,183 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 19:57:37,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:37,234 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:37,324 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_432, v_prenex_434, v_prenex_436], 1=[o_0, v_prenex_431, v_prenex_433, v_prenex_435]} [2021-06-12 19:57:37,328 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 20 treesize of output 16 [2021-06-12 19:57:37,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,332 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 20 treesize of output 16 [2021-06-12 19:57:37,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,484 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 19:57:37,484 INFO L628 ElimStorePlain]: treesize reduction 165, result has 50.5 percent of original size [2021-06-12 19:57:37,487 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 19 treesize of output 15 [2021-06-12 19:57:37,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,552 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 19:57:37,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,616 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 19:57:37,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:57:37,676 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:37,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,734 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 12 treesize of output 8 [2021-06-12 19:57:37,735 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:37,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_433 vanished before elimination [2021-06-12 19:57:37,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_435 vanished before elimination [2021-06-12 19:57:37,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:57:37,790 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-06-12 19:57:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548689956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:37,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705120455] [2021-06-12 19:57:37,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:37,932 INFO L87 Difference]: Start difference. First operand 892 states and 2810 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,599 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-12 19:57:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:38,919 INFO L93 Difference]: Finished difference Result 1287 states and 3877 transitions. [2021-06-12 19:57:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:38,921 INFO L225 Difference]: With dead ends: 1287 [2021-06-12 19:57:38,921 INFO L226 Difference]: Without dead ends: 1199 [2021-06-12 19:57:38,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1062.5ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-12 19:57:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 900. [2021-06-12 19:57:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.1724137931034484) internal successors, (2852), 899 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2852 transitions. [2021-06-12 19:57:38,931 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2852 transitions. Word has length 24 [2021-06-12 19:57:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:38,931 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2852 transitions. [2021-06-12 19:57:38,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2852 transitions. [2021-06-12 19:57:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:38,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:38,932 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:39,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:39,133 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2141360182, now seen corresponding path program 117 times [2021-06-12 19:57:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:39,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402508283] [2021-06-12 19:57:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:39,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:39,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402508283] [2021-06-12 19:57:39,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402508283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488942955] [2021-06-12 19:57:39,265 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 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 19:57:39,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:39,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,402 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 19:57:39,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,421 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 18 treesize of output 14 [2021-06-12 19:57:39,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:57:39,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:57:39,486 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_440], 1=[o_0, v_prenex_439]} [2021-06-12 19:57:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:39,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:57:39,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,542 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 20 treesize of output 16 [2021-06-12 19:57:39,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:57:39,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,593 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 8 [2021-06-12 19:57:39,594 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:39,598 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:39,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,643 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 13 treesize of output 9 [2021-06-12 19:57:39,644 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:39,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,647 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 13 treesize of output 9 [2021-06-12 19:57:39,648 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:39,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:39,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:39,689 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-06-12 19:57:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:39,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488942955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:39,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:39,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934568624] [2021-06-12 19:57:39,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:39,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:39,818 INFO L87 Difference]: Start difference. First operand 900 states and 2852 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:40,937 INFO L93 Difference]: Finished difference Result 1545 states and 4576 transitions. [2021-06-12 19:57:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:57:40,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:40,939 INFO L225 Difference]: With dead ends: 1545 [2021-06-12 19:57:40,939 INFO L226 Difference]: Without dead ends: 1380 [2021-06-12 19:57:40,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 966.8ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-12 19:57:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 918. [2021-06-12 19:57:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.193020719738277) internal successors, (2928), 917 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2928 transitions. [2021-06-12 19:57:40,950 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2928 transitions. Word has length 24 [2021-06-12 19:57:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:40,950 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 2928 transitions. [2021-06-12 19:57:40,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2928 transitions. [2021-06-12 19:57:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:40,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:40,951 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:41,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable930,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:41,152 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2056259042, now seen corresponding path program 118 times [2021-06-12 19:57:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:41,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045874822] [2021-06-12 19:57:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:41,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045874822] [2021-06-12 19:57:41,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045874822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361096726] [2021-06-12 19:57:41,325 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 19:57:41,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:41,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:41,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:41,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:41,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:41,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,511 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 19:57:41,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:57:41,611 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_444], 1=[o_0, v_prenex_443]} [2021-06-12 19:57:41,613 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 19 treesize of output 15 [2021-06-12 19:57:41,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,638 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 19:57:41,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,665 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 12 treesize of output 8 [2021-06-12 19:57:41,666 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:41,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:41,694 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:41,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:41,716 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 19:57:41,716 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361096726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137456806] [2021-06-12 19:57:41,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:41,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:41,794 INFO L87 Difference]: Start difference. First operand 918 states and 2928 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:42,168 INFO L93 Difference]: Finished difference Result 1182 states and 3675 transitions. [2021-06-12 19:57:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:42,170 INFO L225 Difference]: With dead ends: 1182 [2021-06-12 19:57:42,170 INFO L226 Difference]: Without dead ends: 1144 [2021-06-12 19:57:42,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 477.0ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-12 19:57:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 925. [2021-06-12 19:57:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.1915584415584415) internal successors, (2949), 924 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2949 transitions. [2021-06-12 19:57:42,180 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2949 transitions. Word has length 24 [2021-06-12 19:57:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:42,180 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2949 transitions. [2021-06-12 19:57:42,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2949 transitions. [2021-06-12 19:57:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:42,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:42,181 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:42,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-12 19:57:42,381 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash -757732052, now seen corresponding path program 119 times [2021-06-12 19:57:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:42,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655275004] [2021-06-12 19:57:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:42,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:42,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655275004] [2021-06-12 19:57:42,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655275004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429232986] [2021-06-12 19:57:42,497 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 19:57:42,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:42,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,668 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 19:57:42,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,675 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 1 xjuncts. [2021-06-12 19:57:42,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 19:57:42,697 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-12 19:57:42,699 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 19:57:42,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,701 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 19:57:42,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,723 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 12 treesize of output 8 [2021-06-12 19:57:42,724 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:42,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,727 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 12 treesize of output 8 [2021-06-12 19:57:42,728 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:42,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,747 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 19:57:42,747 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:42,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429232986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:42,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:42,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324953324] [2021-06-12 19:57:42,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:42,807 INFO L87 Difference]: Start difference. First operand 925 states and 2949 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:43,309 INFO L93 Difference]: Finished difference Result 1201 states and 3774 transitions. [2021-06-12 19:57:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:43,310 INFO L225 Difference]: With dead ends: 1201 [2021-06-12 19:57:43,310 INFO L226 Difference]: Without dead ends: 1155 [2021-06-12 19:57:43,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-12 19:57:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 925. [2021-06-12 19:57:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.1915584415584415) internal successors, (2949), 924 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2949 transitions. [2021-06-12 19:57:43,320 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2949 transitions. Word has length 24 [2021-06-12 19:57:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:43,320 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2949 transitions. [2021-06-12 19:57:43,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2949 transitions. [2021-06-12 19:57:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:43,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:43,321 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:43,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:43,521 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -126527550, now seen corresponding path program 120 times [2021-06-12 19:57:43,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:43,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663275022] [2021-06-12 19:57:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:43,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:43,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663275022] [2021-06-12 19:57:43,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663275022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371004714] [2021-06-12 19:57:43,711 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 19:57:43,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:43,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:43,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:43,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,853 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 17 treesize of output 13 [2021-06-12 19:57:43,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,856 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 17 treesize of output 13 [2021-06-12 19:57:43,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,905 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 18 treesize of output 14 [2021-06-12 19:57:43,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,908 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 18 treesize of output 14 [2021-06-12 19:57:43,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:43,954 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:44,044 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_451, v_prenex_453, v_prenex_455], 1=[o_2, v_prenex_450, v_prenex_452, v_prenex_454]} [2021-06-12 19:57:44,047 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 19 treesize of output 15 [2021-06-12 19:57:44,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,098 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 20 treesize of output 16 [2021-06-12 19:57:44,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,151 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 20 treesize of output 16 [2021-06-12 19:57:44,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,197 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 19 treesize of output 15 [2021-06-12 19:57:44,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:44,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,241 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 8 [2021-06-12 19:57:44,242 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:44,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,284 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 13 treesize of output 9 [2021-06-12 19:57:44,285 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:44,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:57:44,328 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:44,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:44,368 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 12 treesize of output 8 [2021-06-12 19:57:44,369 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:44,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:44,408 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 19:57:44,408 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-12 19:57:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:44,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371004714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:44,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:44,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511710321] [2021-06-12 19:57:44,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:44,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:44,545 INFO L87 Difference]: Start difference. First operand 925 states and 2949 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:45,286 INFO L93 Difference]: Finished difference Result 1435 states and 4376 transitions. [2021-06-12 19:57:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:45,288 INFO L225 Difference]: With dead ends: 1435 [2021-06-12 19:57:45,288 INFO L226 Difference]: Without dead ends: 1342 [2021-06-12 19:57:45,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 852.3ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-12 19:57:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 944. [2021-06-12 19:57:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.2089077412513256) internal successors, (3026), 943 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3026 transitions. [2021-06-12 19:57:45,299 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3026 transitions. Word has length 24 [2021-06-12 19:57:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:45,299 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3026 transitions. [2021-06-12 19:57:45,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3026 transitions. [2021-06-12 19:57:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:45,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:45,300 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:45,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:45,500 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash 647676820, now seen corresponding path program 121 times [2021-06-12 19:57:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:45,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929045041] [2021-06-12 19:57:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:45,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:45,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929045041] [2021-06-12 19:57:45,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929045041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268208362] [2021-06-12 19:57:45,648 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 19:57:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:45,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:57:45,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,790 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 17 treesize of output 13 [2021-06-12 19:57:45,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,839 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 18 treesize of output 14 [2021-06-12 19:57:45,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,842 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 18 treesize of output 14 [2021-06-12 19:57:45,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:45,893 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:57:46,010 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_461], 1=[o_2, v_prenex_460]} [2021-06-12 19:57:46,013 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 19 treesize of output 15 [2021-06-12 19:57:46,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,016 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 19 treesize of output 15 [2021-06-12 19:57:46,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,075 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-12 19:57:46,077 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 19 treesize of output 15 [2021-06-12 19:57:46,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:46,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:46,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:46,101 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 12 treesize of output 8 [2021-06-12 19:57:46,103 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:46,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:46,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:46,127 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:46,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:46,147 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 19:57:46,147 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-06-12 19:57:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:46,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268208362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:46,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:46,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:46,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237362919] [2021-06-12 19:57:46,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:46,221 INFO L87 Difference]: Start difference. First operand 944 states and 3026 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:47,002 INFO L93 Difference]: Finished difference Result 1459 states and 4538 transitions. [2021-06-12 19:57:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:47,004 INFO L225 Difference]: With dead ends: 1459 [2021-06-12 19:57:47,004 INFO L226 Difference]: Without dead ends: 1356 [2021-06-12 19:57:47,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 773.8ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-12 19:57:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 948. [2021-06-12 19:57:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.215417106652587) internal successors, (3045), 947 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3045 transitions. [2021-06-12 19:57:47,015 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3045 transitions. Word has length 24 [2021-06-12 19:57:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:47,015 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3045 transitions. [2021-06-12 19:57:47,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3045 transitions. [2021-06-12 19:57:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:47,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:47,016 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:47,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable962 [2021-06-12 19:57:47,216 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1329064208, now seen corresponding path program 122 times [2021-06-12 19:57:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:47,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216235877] [2021-06-12 19:57:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:47,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:47,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216235877] [2021-06-12 19:57:47,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216235877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418395545] [2021-06-12 19:57:47,353 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 19:57:47,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:47,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:47,469 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 24 treesize of output 18 [2021-06-12 19:57:47,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,471 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 24 treesize of output 18 [2021-06-12 19:57:47,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:47,490 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:57:47,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:57:47,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,556 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:47,558 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 28 treesize of output 22 [2021-06-12 19:57:47,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:47,574 INFO L518 ElimStorePlain]: Eliminatee v_prenex_464 vanished before elimination [2021-06-12 19:57:47,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:47,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:47,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418395545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:47,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:47,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683015711] [2021-06-12 19:57:47,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:47,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:47,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:47,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:47,670 INFO L87 Difference]: Start difference. First operand 948 states and 3045 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:47,999 INFO L93 Difference]: Finished difference Result 1312 states and 4072 transitions. [2021-06-12 19:57:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:48,001 INFO L225 Difference]: With dead ends: 1312 [2021-06-12 19:57:48,001 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 19:57:48,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 19:57:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 942. [2021-06-12 19:57:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.1934112646121147) internal successors, (3005), 941 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 3005 transitions. [2021-06-12 19:57:48,011 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 3005 transitions. Word has length 24 [2021-06-12 19:57:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:48,011 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 3005 transitions. [2021-06-12 19:57:48,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 3005 transitions. [2021-06-12 19:57:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:48,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:48,012 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:48,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:48,212 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1055041082, now seen corresponding path program 123 times [2021-06-12 19:57:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:48,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475204088] [2021-06-12 19:57:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:48,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475204088] [2021-06-12 19:57:48,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475204088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927934328] [2021-06-12 19:57:48,364 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 19:57:48,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:57:48,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:48,483 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 24 treesize of output 18 [2021-06-12 19:57:48,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,486 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 24 treesize of output 18 [2021-06-12 19:57:48,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:48,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:57:48,544 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 28 treesize of output 22 [2021-06-12 19:57:48,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,562 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:48,570 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 28 treesize of output 22 [2021-06-12 19:57:48,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,588 INFO L518 ElimStorePlain]: Eliminatee v_prenex_467 vanished before elimination [2021-06-12 19:57:48,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:48,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:48,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927934328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:48,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:48,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671532926] [2021-06-12 19:57:48,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:48,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:48,684 INFO L87 Difference]: Start difference. First operand 942 states and 3005 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:48,980 INFO L93 Difference]: Finished difference Result 1346 states and 4155 transitions. [2021-06-12 19:57:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:48,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:48,982 INFO L225 Difference]: With dead ends: 1346 [2021-06-12 19:57:48,982 INFO L226 Difference]: Without dead ends: 1284 [2021-06-12 19:57:48,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-12 19:57:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 917. [2021-06-12 19:57:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.171397379912664) internal successors, (2905), 916 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2905 transitions. [2021-06-12 19:57:48,992 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2905 transitions. Word has length 24 [2021-06-12 19:57:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:48,992 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2905 transitions. [2021-06-12 19:57:48,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2905 transitions. [2021-06-12 19:57:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:48,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:48,993 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:49,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:49,194 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 65109652, now seen corresponding path program 124 times [2021-06-12 19:57:49,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:49,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346017843] [2021-06-12 19:57:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:49,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346017843] [2021-06-12 19:57:49,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346017843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725705853] [2021-06-12 19:57:49,368 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 19:57:49,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:49,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:49,448 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 24 treesize of output 18 [2021-06-12 19:57:49,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,450 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 24 treesize of output 18 [2021-06-12 19:57:49,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:49,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:49,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 19:57:49,532 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 28 treesize of output 22 [2021-06-12 19:57:49,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,534 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 28 treesize of output 22 [2021-06-12 19:57:49,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:49,551 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:57:49,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:49,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-12 19:57:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:49,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725705853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:49,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168319102] [2021-06-12 19:57:49,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:49,634 INFO L87 Difference]: Start difference. First operand 917 states and 2905 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:49,961 INFO L93 Difference]: Finished difference Result 1594 states and 4930 transitions. [2021-06-12 19:57:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:49,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:49,962 INFO L225 Difference]: With dead ends: 1594 [2021-06-12 19:57:49,963 INFO L226 Difference]: Without dead ends: 1532 [2021-06-12 19:57:49,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-06-12 19:57:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 917. [2021-06-12 19:57:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.171397379912664) internal successors, (2905), 916 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2905 transitions. [2021-06-12 19:57:49,973 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2905 transitions. Word has length 24 [2021-06-12 19:57:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:49,973 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2905 transitions. [2021-06-12 19:57:49,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2905 transitions. [2021-06-12 19:57:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:49,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:49,975 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:50,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-06-12 19:57:50,175 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1665315992, now seen corresponding path program 125 times [2021-06-12 19:57:50,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:50,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372055038] [2021-06-12 19:57:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:50,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:50,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372055038] [2021-06-12 19:57:50,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372055038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:50,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313563072] [2021-06-12 19:57:50,357 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 19:57:50,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:50,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:57:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:50,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:50,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:50,471 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 17 treesize of output 13 [2021-06-12 19:57:50,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:50,474 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 19:57:50,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:50,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:50,518 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 18 treesize of output 14 [2021-06-12 19:57:50,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:50,521 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 19:57:50,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:50,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:50,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-12 19:57:50,713 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_473, v_prenex_475, v_prenex_477], 1=[o_2, v_prenex_472, v_prenex_474, v_prenex_476]} [2021-06-12 19:57:50,716 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 20 treesize of output 16 [2021-06-12 19:57:50,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,720 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 20 treesize of output 16 [2021-06-12 19:57:50,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,871 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-12 19:57:50,871 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.3 percent of original size [2021-06-12 19:57:50,874 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 9 treesize of output 7 [2021-06-12 19:57:50,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:50,939 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 19 treesize of output 15 [2021-06-12 19:57:50,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:50,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,001 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 19 treesize of output 15 [2021-06-12 19:57:51,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,062 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 13 treesize of output 9 [2021-06-12 19:57:51,063 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:51,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,126 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-12 19:57:51,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,129 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 12 treesize of output 8 [2021-06-12 19:57:51,130 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:51,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:51,189 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:51,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:57:51,245 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-06-12 19:57:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:51,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313563072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:51,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:51,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024993885] [2021-06-12 19:57:51,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:51,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:51,385 INFO L87 Difference]: Start difference. First operand 917 states and 2905 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,966 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-12 19:57:52,242 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-12 19:57:52,365 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-12 19:57:52,772 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-12 19:57:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:53,020 INFO L93 Difference]: Finished difference Result 1642 states and 5031 transitions. [2021-06-12 19:57:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:57:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:53,023 INFO L225 Difference]: With dead ends: 1642 [2021-06-12 19:57:53,023 INFO L226 Difference]: Without dead ends: 1562 [2021-06-12 19:57:53,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1693.8ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:57:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-06-12 19:57:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 953. [2021-06-12 19:57:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.197478991596639) internal successors, (3044), 952 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3044 transitions. [2021-06-12 19:57:53,034 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3044 transitions. Word has length 24 [2021-06-12 19:57:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:53,034 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3044 transitions. [2021-06-12 19:57:53,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3044 transitions. [2021-06-12 19:57:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:53,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:53,035 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:53,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable992 [2021-06-12 19:57:53,236 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash -65725528, now seen corresponding path program 126 times [2021-06-12 19:57:53,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:53,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073195365] [2021-06-12 19:57:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:53,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073195365] [2021-06-12 19:57:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073195365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195395426] [2021-06-12 19:57:53,412 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 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 19:57:53,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:57:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:53,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,520 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 17 treesize of output 13 [2021-06-12 19:57:53,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,523 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 19:57:53,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,566 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 18 treesize of output 14 [2021-06-12 19:57:53,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,569 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 18 treesize of output 14 [2021-06-12 19:57:53,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:53,609 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-12 19:57:53,762 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_483, v_prenex_485, v_prenex_487], 1=[o_2, v_prenex_482, v_prenex_484, v_prenex_486]} [2021-06-12 19:57:53,765 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 19:57:53,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,816 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 20 treesize of output 16 [2021-06-12 19:57:53,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,864 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 20 treesize of output 16 [2021-06-12 19:57:53,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,909 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 19 treesize of output 15 [2021-06-12 19:57:53,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,954 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 12 treesize of output 8 [2021-06-12 19:57:53,955 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:53,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,999 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 13 treesize of output 9 [2021-06-12 19:57:54,000 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:54,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:54,042 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 13 treesize of output 9 [2021-06-12 19:57:54,043 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:54,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:54,084 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 12 treesize of output 8 [2021-06-12 19:57:54,085 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:54,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,124 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 19:57:54,124 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-12 19:57:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:57:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195395426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:54,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:57:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505790414] [2021-06-12 19:57:54,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:57:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:57:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:54,277 INFO L87 Difference]: Start difference. First operand 953 states and 3044 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:54,770 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-12 19:57:55,013 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-12 19:57:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:55,449 INFO L93 Difference]: Finished difference Result 1639 states and 4981 transitions. [2021-06-12 19:57:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:55,451 INFO L225 Difference]: With dead ends: 1639 [2021-06-12 19:57:55,451 INFO L226 Difference]: Without dead ends: 1550 [2021-06-12 19:57:55,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1227.8ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-12 19:57:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 950. [2021-06-12 19:57:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.197049525816649) internal successors, (3034), 949 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3034 transitions. [2021-06-12 19:57:55,467 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3034 transitions. Word has length 24 [2021-06-12 19:57:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:55,467 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 3034 transitions. [2021-06-12 19:57:55,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call 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 950 states and 3034 transitions. [2021-06-12 19:57:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:55,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:55,469 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:55,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-12 19:57:55,681 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash -891111622, now seen corresponding path program 127 times [2021-06-12 19:57:55,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:55,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109353063] [2021-06-12 19:57:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:55,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109353063] [2021-06-12 19:57:55,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109353063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914249489] [2021-06-12 19:57:55,862 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 19:57:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:55,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:55,970 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 17 treesize of output 13 [2021-06-12 19:57:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:55,973 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 19:57:55,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:56,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:57:56,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:56,019 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 18 treesize of output 14 [2021-06-12 19:57:56,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:56,059 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-12 19:57:56,234 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_493], 1=[o_2, v_prenex_492]} [2021-06-12 19:57:56,236 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 19 treesize of output 15 [2021-06-12 19:57:56,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,259 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 19 treesize of output 15 [2021-06-12 19:57:56,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:56,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:56,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:57:56,282 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:56,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:56,302 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 8 [2021-06-12 19:57:56,303 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:56,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:56,322 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 19:57:56,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:56,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914249489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:56,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:56,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:56,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099217405] [2021-06-12 19:57:56,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:56,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:56,412 INFO L87 Difference]: Start difference. First operand 950 states and 3034 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:57,398 INFO L93 Difference]: Finished difference Result 1644 states and 5039 transitions. [2021-06-12 19:57:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:57,401 INFO L225 Difference]: With dead ends: 1644 [2021-06-12 19:57:57,401 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 19:57:57,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1028.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 19:57:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 957. [2021-06-12 19:57:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.2102510460251046) internal successors, (3069), 956 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3069 transitions. [2021-06-12 19:57:57,412 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3069 transitions. Word has length 24 [2021-06-12 19:57:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:57,413 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3069 transitions. [2021-06-12 19:57:57,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3069 transitions. [2021-06-12 19:57:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:57,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:57,414 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:57,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-06-12 19:57:57,614 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1053116852, now seen corresponding path program 128 times [2021-06-12 19:57:57,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:57,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700612205] [2021-06-12 19:57:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:57,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700612205] [2021-06-12 19:57:57,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700612205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886304139] [2021-06-12 19:57:57,742 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 19:57:57,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:57,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:57,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,853 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 18 treesize of output 14 [2021-06-12 19:57:57,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,856 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 18 treesize of output 14 [2021-06-12 19:57:57,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,900 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 17 treesize of output 13 [2021-06-12 19:57:57,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,903 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 17 treesize of output 13 [2021-06-12 19:57:57,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:57:57,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-12 19:57:58,084 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_499], 1=[o_2, v_prenex_498]} [2021-06-12 19:57:58,086 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 19:57:58,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:58,109 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 19:57:58,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:58,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:58,130 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 12 treesize of output 8 [2021-06-12 19:57:58,131 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:58,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:58,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:58,158 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 12 treesize of output 8 [2021-06-12 19:57:58,159 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:58,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:58,178 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 19:57:58,178 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-12 19:57:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:58,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886304139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:58,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:58,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206710977] [2021-06-12 19:57:58,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:58,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:58,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:58,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:58,258 INFO L87 Difference]: Start difference. First operand 957 states and 3069 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:59,071 INFO L93 Difference]: Finished difference Result 1879 states and 5875 transitions. [2021-06-12 19:57:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:57:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:59,078 INFO L225 Difference]: With dead ends: 1879 [2021-06-12 19:57:59,078 INFO L226 Difference]: Without dead ends: 1817 [2021-06-12 19:57:59,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-12 19:57:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 924. [2021-06-12 19:57:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 3.171180931744312) internal successors, (2927), 923 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2927 transitions. [2021-06-12 19:57:59,090 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2927 transitions. Word has length 24 [2021-06-12 19:57:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:59,090 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 2927 transitions. [2021-06-12 19:57:59,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2927 transitions. [2021-06-12 19:57:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:59,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:59,091 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:59,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1019 [2021-06-12 19:57:59,301 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -189188054, now seen corresponding path program 129 times [2021-06-12 19:57:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199904557] [2021-06-12 19:57:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:59,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:59,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199904557] [2021-06-12 19:57:59,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199904557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843194008] [2021-06-12 19:57:59,439 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 19:57:59,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,550 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 26 treesize of output 20 [2021-06-12 19:57:59,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:57:59,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,574 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 19:57:59,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:57 [2021-06-12 19:57:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,661 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 19:57:59,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,671 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 11 treesize of output 7 [2021-06-12 19:57:59,672 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:59,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,680 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 19:57:59,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-12 19:57:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:57:59,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843194008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:59,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056922836] [2021-06-12 19:57:59,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:59,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:59,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:59,712 INFO L87 Difference]: Start difference. First operand 924 states and 2927 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:57:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:59,895 INFO L93 Difference]: Finished difference Result 995 states and 3106 transitions. [2021-06-12 19:57:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:57:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:59,897 INFO L225 Difference]: With dead ends: 995 [2021-06-12 19:57:59,897 INFO L226 Difference]: Without dead ends: 964 [2021-06-12 19:57:59,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-06-12 19:57:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 932. [2021-06-12 19:57:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.1686358754027926) internal successors, (2950), 931 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2950 transitions. [2021-06-12 19:57:59,905 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2950 transitions. Word has length 24 [2021-06-12 19:57:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:59,905 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 2950 transitions. [2021-06-12 19:57:59,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:57:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2950 transitions. [2021-06-12 19:57:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:57:59,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:59,906 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:00,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1029 [2021-06-12 19:58:00,113 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1927159870, now seen corresponding path program 130 times [2021-06-12 19:58:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:00,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489316211] [2021-06-12 19:58:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:00,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489316211] [2021-06-12 19:58:00,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489316211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047315917] [2021-06-12 19:58:00,285 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 19:58:00,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:00,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,403 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 25 treesize of output 19 [2021-06-12 19:58:00,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:00,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:00,427 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 19:58:00,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:61 [2021-06-12 19:58:00,484 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:00,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,492 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 27 treesize of output 21 [2021-06-12 19:58:00,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:00,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,528 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 13 treesize of output 9 [2021-06-12 19:58:00,530 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:00,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:00,534 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:00,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:00,559 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 19:58:00,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-12 19:58:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:00,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047315917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:00,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:00,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961168899] [2021-06-12 19:58:00,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:00,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:00,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:00,620 INFO L87 Difference]: Start difference. First operand 932 states and 2950 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:00,838 INFO L93 Difference]: Finished difference Result 1027 states and 3186 transitions. [2021-06-12 19:58:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:00,839 INFO L225 Difference]: With dead ends: 1027 [2021-06-12 19:58:00,839 INFO L226 Difference]: Without dead ends: 992 [2021-06-12 19:58:00,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-12 19:58:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 930. [2021-06-12 19:58:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.170075349838536) internal successors, (2945), 929 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2945 transitions. [2021-06-12 19:58:00,848 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2945 transitions. Word has length 24 [2021-06-12 19:58:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:00,849 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 2945 transitions. [2021-06-12 19:58:00,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2945 transitions. [2021-06-12 19:58:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:00,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:00,850 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:01,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1033,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,050 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1830314570, now seen corresponding path program 131 times [2021-06-12 19:58:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:01,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340044216] [2021-06-12 19:58:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:01,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:01,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340044216] [2021-06-12 19:58:01,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340044216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36645783] [2021-06-12 19:58:01,214 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 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 19:58:01,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:58:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,320 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 27 treesize of output 21 [2021-06-12 19:58:01,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,325 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 27 treesize of output 21 [2021-06-12 19:58:01,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:01,355 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 19:58:01,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:99, output treesize:77 [2021-06-12 19:58:01,429 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:58:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,433 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 20 treesize of output 16 [2021-06-12 19:58:01,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:01,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:01,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,444 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 19 treesize of output 15 [2021-06-12 19:58:01,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,525 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.6 percent of original size [2021-06-12 19:58:01,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:01,530 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,532 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 13 treesize of output 9 [2021-06-12 19:58:01,533 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:01,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:01,570 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 19:58:01,570 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-06-12 19:58:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:01,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36645783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:01,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:01,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401613656] [2021-06-12 19:58:01,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:01,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:01,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:01,639 INFO L87 Difference]: Start difference. First operand 930 states and 2945 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 19:58:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:01,839 INFO L93 Difference]: Finished difference Result 991 states and 3082 transitions. [2021-06-12 19:58:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:01,839 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 24 [2021-06-12 19:58:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:01,841 INFO L225 Difference]: With dead ends: 991 [2021-06-12 19:58:01,841 INFO L226 Difference]: Without dead ends: 938 [2021-06-12 19:58:01,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-12 19:58:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 930. [2021-06-12 19:58:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.170075349838536) internal successors, (2945), 929 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2945 transitions. [2021-06-12 19:58:01,849 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2945 transitions. Word has length 24 [2021-06-12 19:58:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 2945 transitions. [2021-06-12 19:58:01,849 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 19:58:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2945 transitions. [2021-06-12 19:58:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:01,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:01,850 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1039 [2021-06-12 19:58:02,064 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1077890356, now seen corresponding path program 132 times [2021-06-12 19:58:02,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:02,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879802178] [2021-06-12 19:58:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:02,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879802178] [2021-06-12 19:58:02,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879802178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595413962] [2021-06-12 19:58:02,213 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 19:58:02,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:02,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:58:02,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:02,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,299 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 18 treesize of output 14 [2021-06-12 19:58:02,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:02,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,323 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 19:58:02,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:58:02,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,462 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 19:58:02,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,465 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 19:58:02,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,493 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 7 [2021-06-12 19:58:02,494 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:02,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,496 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 11 treesize of output 7 [2021-06-12 19:58:02,497 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:02,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,520 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 19:58:02,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 19:58:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:02,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595413962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:02,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:02,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315741572] [2021-06-12 19:58:02,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:02,567 INFO L87 Difference]: Start difference. First operand 930 states and 2945 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:03,108 INFO L93 Difference]: Finished difference Result 1083 states and 3370 transitions. [2021-06-12 19:58:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:03,109 INFO L225 Difference]: With dead ends: 1083 [2021-06-12 19:58:03,109 INFO L226 Difference]: Without dead ends: 1024 [2021-06-12 19:58:03,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-12 19:58:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 938. [2021-06-12 19:58:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.177161152614728) internal successors, (2977), 937 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2977 transitions. [2021-06-12 19:58:03,119 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2977 transitions. Word has length 24 [2021-06-12 19:58:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:03,119 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2977 transitions. [2021-06-12 19:58:03,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2977 transitions. [2021-06-12 19:58:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:03,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:03,120 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:03,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-12 19:58:03,320 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1479105124, now seen corresponding path program 133 times [2021-06-12 19:58:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:03,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177747287] [2021-06-12 19:58:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:03,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177747287] [2021-06-12 19:58:03,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177747287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901848835] [2021-06-12 19:58:03,484 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 19:58:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,572 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 17 treesize of output 13 [2021-06-12 19:58:03,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,576 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 19:58:03,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,579 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 18 treesize of output 14 [2021-06-12 19:58:03,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,582 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 18 treesize of output 14 [2021-06-12 19:58:03,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:03,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 19:58:03,779 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,783 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 20 treesize of output 16 [2021-06-12 19:58:03,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:03,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:03,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,816 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 13 treesize of output 9 [2021-06-12 19:58:03,817 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:03,820 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 12 treesize of output 8 [2021-06-12 19:58:03,821 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:03,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:03,845 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 19:58:03,845 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-06-12 19:58:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:03,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901848835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:03,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:03,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879829763] [2021-06-12 19:58:03,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:03,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:03,893 INFO L87 Difference]: Start difference. First operand 938 states and 2977 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 19:58:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:04,147 INFO L93 Difference]: Finished difference Result 1051 states and 3248 transitions. [2021-06-12 19:58:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:04,148 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 24 [2021-06-12 19:58:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:04,149 INFO L225 Difference]: With dead ends: 1051 [2021-06-12 19:58:04,149 INFO L226 Difference]: Without dead ends: 1016 [2021-06-12 19:58:04,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-12 19:58:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 938. [2021-06-12 19:58:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.177161152614728) internal successors, (2977), 937 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2977 transitions. [2021-06-12 19:58:04,158 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2977 transitions. Word has length 24 [2021-06-12 19:58:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:04,158 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2977 transitions. [2021-06-12 19:58:04,158 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 19:58:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2977 transitions. [2021-06-12 19:58:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:04,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:04,159 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:04,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:04,375 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash -335235380, now seen corresponding path program 134 times [2021-06-12 19:58:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:04,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748076877] [2021-06-12 19:58:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:04,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748076877] [2021-06-12 19:58:04,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748076877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671522679] [2021-06-12 19:58:04,585 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 19:58:04,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,687 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 18 treesize of output 14 [2021-06-12 19:58:04,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,690 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 17 treesize of output 13 [2021-06-12 19:58:04,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,694 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 18 treesize of output 14 [2021-06-12 19:58:04,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,697 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 19:58:04,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:04,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 19:58:04,907 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:04,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,910 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 19:58:04,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,913 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 19:58:04,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,942 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 12 treesize of output 8 [2021-06-12 19:58:04,943 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:04,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,945 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 12 treesize of output 8 [2021-06-12 19:58:04,946 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:04,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:04,971 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 19:58:04,971 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:31 [2021-06-12 19:58:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:05,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671522679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:05,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:05,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086577054] [2021-06-12 19:58:05,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:05,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:05,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:05,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:05,035 INFO L87 Difference]: Start difference. First operand 938 states and 2977 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:05,455 INFO L93 Difference]: Finished difference Result 1149 states and 3520 transitions. [2021-06-12 19:58:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:05,457 INFO L225 Difference]: With dead ends: 1149 [2021-06-12 19:58:05,457 INFO L226 Difference]: Without dead ends: 1072 [2021-06-12 19:58:05,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-12 19:58:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 931. [2021-06-12 19:58:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.170967741935484) internal successors, (2949), 930 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2949 transitions. [2021-06-12 19:58:05,467 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2949 transitions. Word has length 24 [2021-06-12 19:58:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:05,467 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2949 transitions. [2021-06-12 19:58:05,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2949 transitions. [2021-06-12 19:58:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:05,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:05,468 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-12 19:58:05,668 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash -509127550, now seen corresponding path program 135 times [2021-06-12 19:58:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:05,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102641289] [2021-06-12 19:58:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:05,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:05,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102641289] [2021-06-12 19:58:05,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102641289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362174973] [2021-06-12 19:58:05,809 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 19:58:05,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,898 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 18 treesize of output 14 [2021-06-12 19:58:05,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,901 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 17 treesize of output 13 [2021-06-12 19:58:05,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,904 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 17 treesize of output 13 [2021-06-12 19:58:05,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,907 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 18 treesize of output 14 [2021-06-12 19:58:05,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:05,954 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 19:58:06,060 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 19:58:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,064 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 19 treesize of output 15 [2021-06-12 19:58:06,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,068 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 20 treesize of output 16 [2021-06-12 19:58:06,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:06,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:06,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:06,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:06,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,129 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 12 treesize of output 8 [2021-06-12 19:58:06,131 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:06,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,134 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 13 treesize of output 9 [2021-06-12 19:58:06,135 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:06,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,138 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 8 [2021-06-12 19:58:06,139 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:06,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:06,142 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 13 treesize of output 9 [2021-06-12 19:58:06,143 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:06,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:06,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:06,193 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-12 19:58:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:06,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362174973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:06,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:06,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868525204] [2021-06-12 19:58:06,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:06,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:06,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:06,285 INFO L87 Difference]: Start difference. First operand 931 states and 2949 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 19:58:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:06,612 INFO L93 Difference]: Finished difference Result 1140 states and 3513 transitions. [2021-06-12 19:58:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:06,612 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 24 [2021-06-12 19:58:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:06,613 INFO L225 Difference]: With dead ends: 1140 [2021-06-12 19:58:06,613 INFO L226 Difference]: Without dead ends: 1093 [2021-06-12 19:58:06,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-06-12 19:58:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 936. [2021-06-12 19:58:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.1818181818181817) internal successors, (2975), 935 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2975 transitions. [2021-06-12 19:58:06,623 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2975 transitions. Word has length 24 [2021-06-12 19:58:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 2975 transitions. [2021-06-12 19:58:06,623 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 19:58:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2975 transitions. [2021-06-12 19:58:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:06,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:06,624 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:06,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:06,824 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1389401086, now seen corresponding path program 136 times [2021-06-12 19:58:06,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:06,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138400000] [2021-06-12 19:58:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:06,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138400000] [2021-06-12 19:58:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138400000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182277723] [2021-06-12 19:58:06,980 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 19:58:07,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:07,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:07,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:07,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,073 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 18 treesize of output 14 [2021-06-12 19:58:07,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,076 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 19:58:07,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,079 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 19:58:07,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:07,126 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 19:58:07,227 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 19:58:07,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,231 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 20 treesize of output 16 [2021-06-12 19:58:07,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,235 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 19 treesize of output 15 [2021-06-12 19:58:07,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,239 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 20 treesize of output 16 [2021-06-12 19:58:07,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,242 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 19:58:07,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,298 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 8 [2021-06-12 19:58:07,299 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:07,304 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,307 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 13 treesize of output 9 [2021-06-12 19:58:07,308 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:07,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:58:07,312 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:07,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:07,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:07,363 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-12 19:58:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182277723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:07,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377526173] [2021-06-12 19:58:07,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:07,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:07,458 INFO L87 Difference]: Start difference. First operand 936 states and 2975 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 19:58:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:07,702 INFO L93 Difference]: Finished difference Result 1101 states and 3419 transitions. [2021-06-12 19:58:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:07,702 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 24 [2021-06-12 19:58:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:07,703 INFO L225 Difference]: With dead ends: 1101 [2021-06-12 19:58:07,703 INFO L226 Difference]: Without dead ends: 1082 [2021-06-12 19:58:07,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-12 19:58:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 931. [2021-06-12 19:58:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.170967741935484) internal successors, (2949), 930 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2949 transitions. [2021-06-12 19:58:07,713 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2949 transitions. Word has length 24 [2021-06-12 19:58:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:07,713 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2949 transitions. [2021-06-12 19:58:07,713 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 19:58:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2949 transitions. [2021-06-12 19:58:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:07,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:07,714 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:07,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:07,914 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 324643820, now seen corresponding path program 137 times [2021-06-12 19:58:07,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:07,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324580403] [2021-06-12 19:58:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:08,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324580403] [2021-06-12 19:58:08,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324580403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113280962] [2021-06-12 19:58:08,095 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 19:58:08,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:08,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:08,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,194 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 19:58:08,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,197 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 19:58:08,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,230 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 19:58:08,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 19:58:08,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,332 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 19 treesize of output 15 [2021-06-12 19:58:08,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,335 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 20 treesize of output 16 [2021-06-12 19:58:08,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,361 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 11 treesize of output 7 [2021-06-12 19:58:08,362 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:08,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:58:08,365 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:08,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,388 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 19:58:08,388 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-06-12 19:58:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:08,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113280962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:08,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020466305] [2021-06-12 19:58:08,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:08,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:08,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:08,451 INFO L87 Difference]: Start difference. First operand 931 states and 2949 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:08,849 INFO L93 Difference]: Finished difference Result 997 states and 3117 transitions. [2021-06-12 19:58:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:08,851 INFO L225 Difference]: With dead ends: 997 [2021-06-12 19:58:08,851 INFO L226 Difference]: Without dead ends: 958 [2021-06-12 19:58:08,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-12 19:58:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 934. [2021-06-12 19:58:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.1714898177920685) internal successors, (2959), 933 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2959 transitions. [2021-06-12 19:58:08,859 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2959 transitions. Word has length 24 [2021-06-12 19:58:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:08,859 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2959 transitions. [2021-06-12 19:58:08,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2959 transitions. [2021-06-12 19:58:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:08,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:08,860 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:09,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1092 [2021-06-12 19:58:09,061 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:09,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1643686646, now seen corresponding path program 138 times [2021-06-12 19:58:09,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:09,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612960898] [2021-06-12 19:58:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:09,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612960898] [2021-06-12 19:58:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612960898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007396059] [2021-06-12 19:58:09,251 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 19:58:09,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:58:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,326 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 19:58:09,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,329 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 19:58:09,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,356 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 19:58:09,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 19:58:09,429 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:58:09,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,433 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 19 treesize of output 15 [2021-06-12 19:58:09,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,436 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 20 treesize of output 16 [2021-06-12 19:58:09,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:09,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,444 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 20 treesize of output 16 [2021-06-12 19:58:09,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,510 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 12 treesize of output 8 [2021-06-12 19:58:09,511 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:09,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,514 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 13 treesize of output 9 [2021-06-12 19:58:09,515 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:09,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,519 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 13 treesize of output 9 [2021-06-12 19:58:09,520 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:09,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,523 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 11 treesize of output 7 [2021-06-12 19:58:09,533 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:09,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,593 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 19:58:09,593 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-12 19:58:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:09,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007396059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:09,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:09,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772603298] [2021-06-12 19:58:09,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:09,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:09,727 INFO L87 Difference]: Start difference. First operand 934 states and 2959 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 19:58:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:10,400 INFO L93 Difference]: Finished difference Result 1139 states and 3497 transitions. [2021-06-12 19:58:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:10,400 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 24 [2021-06-12 19:58:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:10,402 INFO L225 Difference]: With dead ends: 1139 [2021-06-12 19:58:10,402 INFO L226 Difference]: Without dead ends: 1051 [2021-06-12 19:58:10,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-12 19:58:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 939. [2021-06-12 19:58:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.1823027718550105) internal successors, (2985), 938 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2985 transitions. [2021-06-12 19:58:10,411 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2985 transitions. Word has length 24 [2021-06-12 19:58:10,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:10,411 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2985 transitions. [2021-06-12 19:58:10,411 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 19:58:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2985 transitions. [2021-06-12 19:58:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:10,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:10,412 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:10,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:10,613 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:10,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1771007114, now seen corresponding path program 139 times [2021-06-12 19:58:10,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:10,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329132886] [2021-06-12 19:58:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:10,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:10,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329132886] [2021-06-12 19:58:10,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329132886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:10,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130595641] [2021-06-12 19:58:10,730 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 19:58:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:10,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:10,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,820 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 19:58:10,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,824 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 19 treesize of output 15 [2021-06-12 19:58:10,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:10,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:10,831 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 19:58:10,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:10,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:10,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:10,889 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-12 19:58:11,028 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-12 19:58:11,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,032 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 19 treesize of output 15 [2021-06-12 19:58:11,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:11,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,041 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 19:58:11,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,046 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 20 treesize of output 16 [2021-06-12 19:58:11,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,057 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 19:58:11,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,062 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 20 treesize of output 16 [2021-06-12 19:58:11,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,073 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 20 treesize of output 16 [2021-06-12 19:58:11,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,078 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 20 treesize of output 16 [2021-06-12 19:58:11,078 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,246 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-12 19:58:11,246 INFO L628 ElimStorePlain]: treesize reduction 167, result has 53.5 percent of original size [2021-06-12 19:58:11,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,250 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 12 treesize of output 8 [2021-06-12 19:58:11,251 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:11,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,255 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 7 [2021-06-12 19:58:11,256 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:11,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,259 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 13 treesize of output 9 [2021-06-12 19:58:11,260 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:11,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:58:11,332 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-12 19:58:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:11,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130595641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:11,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:11,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894261592] [2021-06-12 19:58:11,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:11,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:11,454 INFO L87 Difference]: Start difference. First operand 939 states and 2985 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 19:58:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:11,876 INFO L93 Difference]: Finished difference Result 1278 states and 3865 transitions. [2021-06-12 19:58:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:11,876 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 24 [2021-06-12 19:58:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:11,878 INFO L225 Difference]: With dead ends: 1278 [2021-06-12 19:58:11,878 INFO L226 Difference]: Without dead ends: 1160 [2021-06-12 19:58:11,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-12 19:58:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 933. [2021-06-12 19:58:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 3.174892703862661) internal successors, (2959), 932 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2959 transitions. [2021-06-12 19:58:11,888 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2959 transitions. Word has length 24 [2021-06-12 19:58:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:11,888 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2959 transitions. [2021-06-12 19:58:11,888 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 19:58:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2959 transitions. [2021-06-12 19:58:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:11,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:11,889 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:12,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-12 19:58:12,089 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash 545296860, now seen corresponding path program 140 times [2021-06-12 19:58:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:12,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329163152] [2021-06-12 19:58:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:12,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329163152] [2021-06-12 19:58:12,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329163152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959921773] [2021-06-12 19:58:12,245 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 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 19:58:12,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:12,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:12,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:12,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:12,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:12,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:58:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,507 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 19:58:12,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,509 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 19 treesize of output 15 [2021-06-12 19:58:12,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,535 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 7 [2021-06-12 19:58:12,536 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:12,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,538 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 11 treesize of output 7 [2021-06-12 19:58:12,539 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:12,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:12,560 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 19:58:12,560 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-12 19:58:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959921773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:12,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:12,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052033241] [2021-06-12 19:58:12,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:12,602 INFO L87 Difference]: Start difference. First operand 933 states and 2959 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 19:58:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:13,235 INFO L93 Difference]: Finished difference Result 1097 states and 3426 transitions. [2021-06-12 19:58:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:13,235 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 24 [2021-06-12 19:58:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:13,236 INFO L225 Difference]: With dead ends: 1097 [2021-06-12 19:58:13,236 INFO L226 Difference]: Without dead ends: 1026 [2021-06-12 19:58:13,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-12 19:58:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 950. [2021-06-12 19:58:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.1865121180189675) internal successors, (3024), 949 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3024 transitions. [2021-06-12 19:58:13,245 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3024 transitions. Word has length 24 [2021-06-12 19:58:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:13,245 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 3024 transitions. [2021-06-12 19:58:13,245 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 19:58:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3024 transitions. [2021-06-12 19:58:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:13,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:13,247 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:13,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1126,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:13,463 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1192674956, now seen corresponding path program 141 times [2021-06-12 19:58:13,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:13,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684252020] [2021-06-12 19:58:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:13,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:13,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684252020] [2021-06-12 19:58:13,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684252020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550405142] [2021-06-12 19:58:13,621 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 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 19:58:13,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:13,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:13,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:13,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:13,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:58:13,891 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:13,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,898 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 19:58:13,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:13,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,905 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 19 treesize of output 15 [2021-06-12 19:58:13,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:13,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,953 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 12 treesize of output 8 [2021-06-12 19:58:13,954 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:13,958 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,961 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 13 treesize of output 9 [2021-06-12 19:58:13,963 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:13,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:13,965 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 13 treesize of output 9 [2021-06-12 19:58:13,966 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:14,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:14,007 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 19:58:14,008 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:161, output treesize:57 [2021-06-12 19:58:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:14,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550405142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:14,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:14,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637539257] [2021-06-12 19:58:14,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:14,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:14,091 INFO L87 Difference]: Start difference. First operand 950 states and 3024 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 19:58:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:14,609 INFO L93 Difference]: Finished difference Result 1178 states and 3591 transitions. [2021-06-12 19:58:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:14,609 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 24 [2021-06-12 19:58:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:14,610 INFO L225 Difference]: With dead ends: 1178 [2021-06-12 19:58:14,610 INFO L226 Difference]: Without dead ends: 1090 [2021-06-12 19:58:14,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-12 19:58:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 952. [2021-06-12 19:58:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.185068349106204) internal successors, (3029), 951 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3029 transitions. [2021-06-12 19:58:14,622 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3029 transitions. Word has length 24 [2021-06-12 19:58:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:14,622 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3029 transitions. [2021-06-12 19:58:14,622 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 19:58:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3029 transitions. [2021-06-12 19:58:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:14,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:14,623 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:14,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-12 19:58:14,828 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1287951836, now seen corresponding path program 142 times [2021-06-12 19:58:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335864141] [2021-06-12 19:58:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:15,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335864141] [2021-06-12 19:58:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335864141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422457229] [2021-06-12 19:58:15,005 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 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 19:58:15,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:15,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,102 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 19:58:15,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,106 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 19:58:15,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,156 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 18 treesize of output 14 [2021-06-12 19:58:15,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,159 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 18 treesize of output 14 [2021-06-12 19:58:15,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:15,204 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:58:15,362 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:15,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,365 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 19:58:15,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,368 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 19 treesize of output 15 [2021-06-12 19:58:15,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,394 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 12 treesize of output 8 [2021-06-12 19:58:15,395 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:15,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,398 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 12 treesize of output 8 [2021-06-12 19:58:15,399 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:15,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,427 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 19:58:15,427 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-12 19:58:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422457229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902476035] [2021-06-12 19:58:15,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:15,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:15,486 INFO L87 Difference]: Start difference. First operand 952 states and 3029 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 19:58:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:15,874 INFO L93 Difference]: Finished difference Result 1249 states and 3801 transitions. [2021-06-12 19:58:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:15,874 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 24 [2021-06-12 19:58:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:15,875 INFO L225 Difference]: With dead ends: 1249 [2021-06-12 19:58:15,875 INFO L226 Difference]: Without dead ends: 1172 [2021-06-12 19:58:15,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 469.1ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-12 19:58:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 951. [2021-06-12 19:58:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.1842105263157894) internal successors, (3025), 950 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3025 transitions. [2021-06-12 19:58:15,885 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3025 transitions. Word has length 24 [2021-06-12 19:58:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:15,886 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3025 transitions. [2021-06-12 19:58:15,886 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 19:58:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3025 transitions. [2021-06-12 19:58:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:15,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:15,887 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:16,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-06-12 19:58:16,093 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1114059666, now seen corresponding path program 143 times [2021-06-12 19:58:16,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:16,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750879722] [2021-06-12 19:58:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:16,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:16,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750879722] [2021-06-12 19:58:16,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750879722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349171610] [2021-06-12 19:58:16,284 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 19:58:16,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:16,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,390 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 18 treesize of output 14 [2021-06-12 19:58:16,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:16,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:16,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:16,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,446 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 17 treesize of output 13 [2021-06-12 19:58:16,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:16,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:16,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:58:16,588 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 19:58:16,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:16,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,595 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 20 treesize of output 16 [2021-06-12 19:58:16,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,599 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 20 treesize of output 16 [2021-06-12 19:58:16,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:16,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:16,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:16,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,654 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 13 treesize of output 9 [2021-06-12 19:58:16,655 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:16,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,658 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 12 treesize of output 8 [2021-06-12 19:58:16,659 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:16,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,663 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 8 [2021-06-12 19:58:16,664 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:16,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:16,667 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 13 treesize of output 9 [2021-06-12 19:58:16,668 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:16,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:16,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:16,712 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-06-12 19:58:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:16,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349171610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:16,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:16,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323617338] [2021-06-12 19:58:16,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:16,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:16,820 INFO L87 Difference]: Start difference. First operand 951 states and 3025 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:17,433 INFO L93 Difference]: Finished difference Result 1352 states and 4145 transitions. [2021-06-12 19:58:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:17,434 INFO L225 Difference]: With dead ends: 1352 [2021-06-12 19:58:17,434 INFO L226 Difference]: Without dead ends: 1286 [2021-06-12 19:58:17,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-12 19:58:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 966. [2021-06-12 19:58:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.1979274611398965) internal successors, (3086), 965 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3086 transitions. [2021-06-12 19:58:17,445 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3086 transitions. Word has length 24 [2021-06-12 19:58:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:17,445 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 3086 transitions. [2021-06-12 19:58:17,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3086 transitions. [2021-06-12 19:58:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:17,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:17,446 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:17,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1157 [2021-06-12 19:58:17,661 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1229820580, now seen corresponding path program 144 times [2021-06-12 19:58:17,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:17,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550005176] [2021-06-12 19:58:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:17,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550005176] [2021-06-12 19:58:17,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550005176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797092678] [2021-06-12 19:58:17,843 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 19:58:17,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:17,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:17,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:17,941 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 17 treesize of output 13 [2021-06-12 19:58:17,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:17,962 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 18 treesize of output 14 [2021-06-12 19:58:17,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:17,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:17,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:17,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:58:18,037 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,041 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 20 treesize of output 16 [2021-06-12 19:58:18,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:18,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,048 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 20 treesize of output 16 [2021-06-12 19:58:18,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,052 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 19:58:18,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,106 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 13 treesize of output 9 [2021-06-12 19:58:18,107 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:18,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,110 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 12 treesize of output 8 [2021-06-12 19:58:18,111 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:18,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,114 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 12 treesize of output 8 [2021-06-12 19:58:18,115 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:18,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,118 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 13 treesize of output 9 [2021-06-12 19:58:18,119 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:18,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,166 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 19:58:18,167 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:69 [2021-06-12 19:58:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:18,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797092678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:18,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:18,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567330812] [2021-06-12 19:58:18,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:18,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:18,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:18,277 INFO L87 Difference]: Start difference. First operand 966 states and 3086 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:18,907 INFO L93 Difference]: Finished difference Result 1331 states and 4124 transitions. [2021-06-12 19:58:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:18,908 INFO L225 Difference]: With dead ends: 1331 [2021-06-12 19:58:18,909 INFO L226 Difference]: Without dead ends: 1273 [2021-06-12 19:58:18,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 674.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-12 19:58:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 966. [2021-06-12 19:58:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.204145077720207) internal successors, (3092), 965 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3092 transitions. [2021-06-12 19:58:18,919 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3092 transitions. Word has length 24 [2021-06-12 19:58:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:18,919 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 3092 transitions. [2021-06-12 19:58:18,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3092 transitions. [2021-06-12 19:58:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:18,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:18,920 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:19,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-06-12 19:58:19,121 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1295739212, now seen corresponding path program 145 times [2021-06-12 19:58:19,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:19,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168979218] [2021-06-12 19:58:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:19,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:19,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168979218] [2021-06-12 19:58:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168979218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:19,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343196299] [2021-06-12 19:58:19,264 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 19:58:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:19,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:19,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:19,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:19,371 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 17 treesize of output 13 [2021-06-12 19:58:19,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:19,374 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 19:58:19,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:19,397 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 19:58:19,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 19:58:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:19,501 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 19:58:19,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:19,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:19,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:19,511 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 7 [2021-06-12 19:58:19,512 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:19,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:19,519 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 19:58:19,519 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-06-12 19:58:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:19,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343196299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:19,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:19,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:19,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040128081] [2021-06-12 19:58:19,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:19,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:19,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:19,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:19,553 INFO L87 Difference]: Start difference. First operand 966 states and 3092 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:19,821 INFO L93 Difference]: Finished difference Result 1069 states and 3382 transitions. [2021-06-12 19:58:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:19,822 INFO L225 Difference]: With dead ends: 1069 [2021-06-12 19:58:19,822 INFO L226 Difference]: Without dead ends: 1050 [2021-06-12 19:58:19,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-12 19:58:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 970. [2021-06-12 19:58:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 3.2053663570691433) internal successors, (3106), 969 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 3106 transitions. [2021-06-12 19:58:19,831 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 3106 transitions. Word has length 24 [2021-06-12 19:58:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:19,831 INFO L482 AbstractCegarLoop]: Abstraction has 970 states and 3106 transitions. [2021-06-12 19:58:19,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 3106 transitions. [2021-06-12 19:58:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:19,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:19,833 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:20,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:20,033 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash 136438058, now seen corresponding path program 146 times [2021-06-12 19:58:20,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:20,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165455768] [2021-06-12 19:58:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:20,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:20,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165455768] [2021-06-12 19:58:20,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165455768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190379138] [2021-06-12 19:58:20,175 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 19:58:20,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:20,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:20,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:20,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:20,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,286 INFO 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 19:58:20,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 19:58:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,334 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 19:58:20,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,337 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 19:58:20,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,365 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 11 treesize of output 7 [2021-06-12 19:58:20,366 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:20,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:20,370 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:20,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:20,392 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 19:58:20,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-12 19:58:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:20,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190379138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:20,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879321714] [2021-06-12 19:58:20,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:20,452 INFO L87 Difference]: Start difference. First operand 970 states and 3106 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 19:58:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:20,779 INFO L93 Difference]: Finished difference Result 1126 states and 3538 transitions. [2021-06-12 19:58:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:20,779 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 24 [2021-06-12 19:58:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:20,781 INFO L225 Difference]: With dead ends: 1126 [2021-06-12 19:58:20,781 INFO L226 Difference]: Without dead ends: 1069 [2021-06-12 19:58:20,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-12 19:58:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 942. [2021-06-12 19:58:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.1742826780021254) internal successors, (2987), 941 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2987 transitions. [2021-06-12 19:58:20,790 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2987 transitions. Word has length 24 [2021-06-12 19:58:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:20,790 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2987 transitions. [2021-06-12 19:58:20,790 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 19:58:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2987 transitions. [2021-06-12 19:58:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:20,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:20,791 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:20,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-12 19:58:20,991 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1617414260, now seen corresponding path program 147 times [2021-06-12 19:58:20,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:20,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511578312] [2021-06-12 19:58:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:21,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511578312] [2021-06-12 19:58:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511578312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335381107] [2021-06-12 19:58:21,115 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 19:58:21,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:21,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:21,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,246 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 17 treesize of output 13 [2021-06-12 19:58:21,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,249 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 19:58:21,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,280 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 19:58:21,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-12 19:58:21,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,347 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 19:58:21,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:21,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,405 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 11 treesize of output 7 [2021-06-12 19:58:21,406 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:21,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,439 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 11 treesize of output 7 [2021-06-12 19:58:21,440 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:21,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,463 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 19:58:21,463 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-12 19:58:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:21,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335381107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:21,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:21,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916433626] [2021-06-12 19:58:21,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:21,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:21,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:21,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:21,533 INFO L87 Difference]: Start difference. First operand 942 states and 2987 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 19:58:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:21,725 INFO L93 Difference]: Finished difference Result 1081 states and 3372 transitions. [2021-06-12 19:58:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:21,725 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 24 [2021-06-12 19:58:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:21,726 INFO L225 Difference]: With dead ends: 1081 [2021-06-12 19:58:21,726 INFO L226 Difference]: Without dead ends: 1019 [2021-06-12 19:58:21,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-12 19:58:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 935. [2021-06-12 19:58:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1755888650963597) internal successors, (2966), 934 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2966 transitions. [2021-06-12 19:58:21,735 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2966 transitions. Word has length 24 [2021-06-12 19:58:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:21,735 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2966 transitions. [2021-06-12 19:58:21,735 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 19:58:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2966 transitions. [2021-06-12 19:58:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:21,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:21,736 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:21,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:21,937 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2046348534, now seen corresponding path program 148 times [2021-06-12 19:58:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564224524] [2021-06-12 19:58:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:22,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:22,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564224524] [2021-06-12 19:58:22,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564224524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499877511] [2021-06-12 19:58:22,125 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 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 19:58:22,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:22,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:22,205 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 18 treesize of output 14 [2021-06-12 19:58:22,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,208 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 17 treesize of output 13 [2021-06-12 19:58:22,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,211 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 18 treesize of output 14 [2021-06-12 19:58:22,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,214 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 19:58:22,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:22,257 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:58:22,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,358 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 20 treesize of output 16 [2021-06-12 19:58:22,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:22,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,525 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-12 19:58:22,526 INFO L628 ElimStorePlain]: treesize reduction 164, result has 52.7 percent of original size [2021-06-12 19:58:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:22,530 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:22,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,599 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 19 treesize of output 15 [2021-06-12 19:58:22,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,665 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 7 [2021-06-12 19:58:22,667 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:22,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,730 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 19 treesize of output 15 [2021-06-12 19:58:22,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:22,792 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 11 treesize of output 7 [2021-06-12 19:58:22,793 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:22,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,854 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 9 treesize of output 7 [2021-06-12 19:58:22,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:22,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:22,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_546 vanished before elimination [2021-06-12 19:58:22,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:58:22,912 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-12 19:58:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:23,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499877511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:23,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:23,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786916905] [2021-06-12 19:58:23,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:23,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:23,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:23,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:23,053 INFO L87 Difference]: Start difference. First operand 935 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:23,549 INFO L93 Difference]: Finished difference Result 1351 states and 4150 transitions. [2021-06-12 19:58:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:23,550 INFO L225 Difference]: With dead ends: 1351 [2021-06-12 19:58:23,550 INFO L226 Difference]: Without dead ends: 1271 [2021-06-12 19:58:23,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-12 19:58:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 957. [2021-06-12 19:58:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.1935146443514646) internal successors, (3053), 956 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3053 transitions. [2021-06-12 19:58:23,561 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3053 transitions. Word has length 24 [2021-06-12 19:58:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:23,561 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3053 transitions. [2021-06-12 19:58:23,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3053 transitions. [2021-06-12 19:58:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:23,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:23,562 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:23,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-06-12 19:58:23,763 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:23,763 INFO L82 PathProgramCache]: Analyzing trace with hash -95261484, now seen corresponding path program 149 times [2021-06-12 19:58:23,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:23,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424354617] [2021-06-12 19:58:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:23,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424354617] [2021-06-12 19:58:23,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424354617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309207111] [2021-06-12 19:58:23,924 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 19:58:23,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:23,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:24,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:58:24,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,022 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 19:58:24,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,025 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 18 treesize of output 14 [2021-06-12 19:58:24,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,027 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 17 treesize of output 13 [2021-06-12 19:58:24,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:24,070 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:58:24,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,150 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 19 treesize of output 15 [2021-06-12 19:58:24,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,154 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 19 treesize of output 15 [2021-06-12 19:58:24,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,302 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-12 19:58:24,302 INFO L628 ElimStorePlain]: treesize reduction 146, result has 54.8 percent of original size [2021-06-12 19:58:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,306 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 7 [2021-06-12 19:58:24,307 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:24,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,370 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 20 treesize of output 16 [2021-06-12 19:58:24,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 19:58:24,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,433 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 12 treesize of output 8 [2021-06-12 19:58:24,434 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:24,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,490 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 19 treesize of output 15 [2021-06-12 19:58:24,491 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:24,547 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:24,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,600 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 9 treesize of output 7 [2021-06-12 19:58:24,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,650 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-06-12 19:58:24,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:58:24,652 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:337, output treesize:81 [2021-06-12 19:58:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:24,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309207111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:24,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393764897] [2021-06-12 19:58:24,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:24,779 INFO L87 Difference]: Start difference. First operand 957 states and 3053 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:25,079 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-06-12 19:58:25,298 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-06-12 19:58:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:25,559 INFO L93 Difference]: Finished difference Result 1363 states and 4127 transitions. [2021-06-12 19:58:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:25,561 INFO L225 Difference]: With dead ends: 1363 [2021-06-12 19:58:25,561 INFO L226 Difference]: Without dead ends: 1286 [2021-06-12 19:58:25,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-12 19:58:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 954. [2021-06-12 19:58:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.1930745015739768) internal successors, (3043), 953 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3043 transitions. [2021-06-12 19:58:25,571 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3043 transitions. Word has length 24 [2021-06-12 19:58:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:25,571 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3043 transitions. [2021-06-12 19:58:25,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3043 transitions. [2021-06-12 19:58:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:25,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:25,572 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:25,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:25,772 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1272144164, now seen corresponding path program 150 times [2021-06-12 19:58:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:25,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645573975] [2021-06-12 19:58:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:25,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645573975] [2021-06-12 19:58:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645573975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472666598] [2021-06-12 19:58:25,932 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 19:58:25,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:25,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:26,011 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 17 treesize of output 13 [2021-06-12 19:58:26,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,013 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 18 treesize of output 14 [2021-06-12 19:58:26,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,033 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 19:58:26,033 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 19:58:26,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,089 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 19 treesize of output 15 [2021-06-12 19:58:26,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:26,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:26,117 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:26,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,119 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 11 treesize of output 7 [2021-06-12 19:58:26,120 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:26,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,139 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 19:58:26,139 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 19:58:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:26,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472666598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:26,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:26,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870205303] [2021-06-12 19:58:26,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:26,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:26,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:26,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:26,210 INFO L87 Difference]: Start difference. First operand 954 states and 3043 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:26,799 INFO L93 Difference]: Finished difference Result 1206 states and 3769 transitions. [2021-06-12 19:58:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:26,800 INFO L225 Difference]: With dead ends: 1206 [2021-06-12 19:58:26,800 INFO L226 Difference]: Without dead ends: 1147 [2021-06-12 19:58:26,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-12 19:58:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 935. [2021-06-12 19:58:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1755888650963597) internal successors, (2966), 934 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2966 transitions. [2021-06-12 19:58:26,810 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2966 transitions. Word has length 24 [2021-06-12 19:58:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:26,810 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2966 transitions. [2021-06-12 19:58:26,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2966 transitions. [2021-06-12 19:58:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:26,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:26,811 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:27,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-12 19:58:27,012 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:27,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1136237428, now seen corresponding path program 151 times [2021-06-12 19:58:27,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:27,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120914272] [2021-06-12 19:58:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:27,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:27,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120914272] [2021-06-12 19:58:27,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120914272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143596994] [2021-06-12 19:58:27,191 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 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 19:58:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:27,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,296 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 19:58:27,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,300 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 19 treesize of output 15 [2021-06-12 19:58:27,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,381 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 19:58:27,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,385 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 19 treesize of output 15 [2021-06-12 19:58:27,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:27,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:58:27,618 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:58:27,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,621 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 30 treesize of output 24 [2021-06-12 19:58:27,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:27,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,629 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 29 treesize of output 23 [2021-06-12 19:58:27,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,632 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 19:58:27,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,720 INFO L628 ElimStorePlain]: treesize reduction 58, result has 65.9 percent of original size [2021-06-12 19:58:27,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,723 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 13 treesize of output 9 [2021-06-12 19:58:27,724 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:27,726 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 11 treesize of output 7 [2021-06-12 19:58:27,728 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:27,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,767 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 19:58:27,767 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:209, output treesize:56 [2021-06-12 19:58:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:27,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143596994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:27,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:27,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590468796] [2021-06-12 19:58:27,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:27,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:27,843 INFO L87 Difference]: Start difference. First operand 935 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:28,226 INFO L93 Difference]: Finished difference Result 1042 states and 3275 transitions. [2021-06-12 19:58:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:28,228 INFO L225 Difference]: With dead ends: 1042 [2021-06-12 19:58:28,228 INFO L226 Difference]: Without dead ends: 989 [2021-06-12 19:58:28,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-12 19:58:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 941. [2021-06-12 19:58:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.175531914893617) internal successors, (2985), 940 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2985 transitions. [2021-06-12 19:58:28,236 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2985 transitions. Word has length 24 [2021-06-12 19:58:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:28,236 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2985 transitions. [2021-06-12 19:58:28,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2985 transitions. [2021-06-12 19:58:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:28,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:28,238 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:28,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1207 [2021-06-12 19:58:28,438 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:28,438 INFO L82 PathProgramCache]: Analyzing trace with hash -832093038, now seen corresponding path program 152 times [2021-06-12 19:58:28,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:28,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4573697] [2021-06-12 19:58:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:28,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:28,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4573697] [2021-06-12 19:58:28,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4573697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854648642] [2021-06-12 19:58:28,645 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 19:58:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:28,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,751 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 19 treesize of output 15 [2021-06-12 19:58:28,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,755 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 19 treesize of output 15 [2021-06-12 19:58:28,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,831 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 19:58:28,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,834 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 19:58:28,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:28,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:58:29,034 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-12 19:58:29,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,039 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 20 treesize of output 16 [2021-06-12 19:58:29,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:29,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,050 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 19:58:29,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,055 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 19:58:29,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:29,061 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,066 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 20 treesize of output 16 [2021-06-12 19:58:29,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:29,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:29,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,258 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-12 19:58:29,259 INFO L628 ElimStorePlain]: treesize reduction 173, result has 53.9 percent of original size [2021-06-12 19:58:29,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,262 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 11 treesize of output 7 [2021-06-12 19:58:29,263 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,267 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 12 treesize of output 8 [2021-06-12 19:58:29,268 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:29,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,272 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 13 treesize of output 9 [2021-06-12 19:58:29,273 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:29,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:29,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:58:29,347 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:111 [2021-06-12 19:58:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:29,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854648642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:29,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333717229] [2021-06-12 19:58:29,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:29,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:29,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:29,486 INFO L87 Difference]: Start difference. First operand 941 states and 2985 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:29,943 INFO L93 Difference]: Finished difference Result 1158 states and 3588 transitions. [2021-06-12 19:58:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:29,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:29,944 INFO L225 Difference]: With dead ends: 1158 [2021-06-12 19:58:29,944 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 19:58:29,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:29,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 19:58:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 944. [2021-06-12 19:58:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.176033934252386) internal successors, (2995), 943 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2995 transitions. [2021-06-12 19:58:29,954 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2995 transitions. Word has length 24 [2021-06-12 19:58:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:29,954 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2995 transitions. [2021-06-12 19:58:29,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2995 transitions. [2021-06-12 19:58:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:29,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:29,955 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:30,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:30,156 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 767497426, now seen corresponding path program 153 times [2021-06-12 19:58:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:30,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144554200] [2021-06-12 19:58:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:30,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:30,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144554200] [2021-06-12 19:58:30,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144554200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:30,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670745453] [2021-06-12 19:58:30,365 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 19:58:30,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:30,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:30,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,467 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 19:58:30,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:30,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:30,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,562 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 19 treesize of output 15 [2021-06-12 19:58:30,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:30,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:58:30,767 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-12 19:58:30,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:30,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:30,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,781 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 20 treesize of output 16 [2021-06-12 19:58:30,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,785 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 20 treesize of output 16 [2021-06-12 19:58:30,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,790 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 19:58:30,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,795 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 19:58:30,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,799 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 20 treesize of output 16 [2021-06-12 19:58:30,800 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,804 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 19:58:30,804 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,985 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-12 19:58:30,986 INFO L628 ElimStorePlain]: treesize reduction 174, result has 53.7 percent of original size [2021-06-12 19:58:30,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,989 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 13 treesize of output 9 [2021-06-12 19:58:30,991 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,994 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 7 [2021-06-12 19:58:30,995 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,999 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 12 treesize of output 8 [2021-06-12 19:58:31,000 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:31,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:31,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:58:31,074 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-06-12 19:58:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670745453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:31,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:31,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:31,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189712478] [2021-06-12 19:58:31,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:31,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:31,219 INFO L87 Difference]: Start difference. First operand 944 states and 2995 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:31,819 INFO L93 Difference]: Finished difference Result 1307 states and 3948 transitions. [2021-06-12 19:58:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:31,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:31,821 INFO L225 Difference]: With dead ends: 1307 [2021-06-12 19:58:31,821 INFO L226 Difference]: Without dead ends: 1185 [2021-06-12 19:58:31,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-12 19:58:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 938. [2021-06-12 19:58:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.175026680896478) internal successors, (2975), 937 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2975 transitions. [2021-06-12 19:58:31,831 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2975 transitions. Word has length 24 [2021-06-12 19:58:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:31,831 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2975 transitions. [2021-06-12 19:58:31,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2975 transitions. [2021-06-12 19:58:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:31,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:31,832 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:32,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1223,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:32,033 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:32,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:32,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1437025154, now seen corresponding path program 154 times [2021-06-12 19:58:32,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:32,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451495782] [2021-06-12 19:58:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:32,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:32,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451495782] [2021-06-12 19:58:32,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451495782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502771616] [2021-06-12 19:58:32,243 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 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 19:58:32,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:32,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:32,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:32,326 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 17 treesize of output 13 [2021-06-12 19:58:32,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,329 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 18 treesize of output 14 [2021-06-12 19:58:32,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:58:32,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,334 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 17 treesize of output 13 [2021-06-12 19:58:32,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:32,376 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:58:32,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,467 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 19:58:32,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,518 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 7 [2021-06-12 19:58:32,519 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:32,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,569 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 20 treesize of output 16 [2021-06-12 19:58:32,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,617 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 12 treesize of output 8 [2021-06-12 19:58:32,618 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:32,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,665 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 19:58:32,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,710 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 11 treesize of output 7 [2021-06-12 19:58:32,712 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:32,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,755 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 20 treesize of output 16 [2021-06-12 19:58:32,756 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,797 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 12 treesize of output 8 [2021-06-12 19:58:32,798 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:32,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,842 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 19:58:32,842 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 19:58:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:32,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502771616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:32,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:32,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811816969] [2021-06-12 19:58:32,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:32,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:32,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:32,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:32,977 INFO L87 Difference]: Start difference. First operand 938 states and 2975 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:33,436 INFO L93 Difference]: Finished difference Result 1258 states and 3862 transitions. [2021-06-12 19:58:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:33,438 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 19:58:33,438 INFO L226 Difference]: Without dead ends: 1165 [2021-06-12 19:58:33,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-12 19:58:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 957. [2021-06-12 19:58:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.192468619246862) internal successors, (3052), 956 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3052 transitions. [2021-06-12 19:58:33,448 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3052 transitions. Word has length 24 [2021-06-12 19:58:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:33,448 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3052 transitions. [2021-06-12 19:58:33,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3052 transitions. [2021-06-12 19:58:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:33,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:33,449 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:33,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:33,649 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2083737772, now seen corresponding path program 155 times [2021-06-12 19:58:33,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:33,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841483720] [2021-06-12 19:58:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:33,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:33,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841483720] [2021-06-12 19:58:33,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841483720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409015337] [2021-06-12 19:58:33,899 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 19:58:33,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:33,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:33,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:33,975 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 17 treesize of output 13 [2021-06-12 19:58:33,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,978 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 18 treesize of output 14 [2021-06-12 19:58:33,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:33,998 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 2 xjuncts. [2021-06-12 19:58:33,998 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 19:58:34,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:34,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:34,055 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 19:58:34,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:34,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:34,058 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 19:58:34,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:34,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:34,082 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 7 [2021-06-12 19:58:34,083 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:34,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:34,085 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 7 [2021-06-12 19:58:34,087 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:34,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:34,106 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 19:58:34,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 19:58:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:34,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409015337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:34,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:34,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:34,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106951381] [2021-06-12 19:58:34,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:34,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:34,177 INFO L87 Difference]: Start difference. First operand 957 states and 3052 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:34,673 INFO L93 Difference]: Finished difference Result 1104 states and 3493 transitions. [2021-06-12 19:58:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:34,674 INFO L225 Difference]: With dead ends: 1104 [2021-06-12 19:58:34,674 INFO L226 Difference]: Without dead ends: 1058 [2021-06-12 19:58:34,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-12 19:58:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 935. [2021-06-12 19:58:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1755888650963597) internal successors, (2966), 934 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2966 transitions. [2021-06-12 19:58:34,683 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2966 transitions. Word has length 24 [2021-06-12 19:58:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:34,684 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2966 transitions. [2021-06-12 19:58:34,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2966 transitions. [2021-06-12 19:58:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:34,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:34,685 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:34,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:34,885 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash -522906514, now seen corresponding path program 156 times [2021-06-12 19:58:34,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:34,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748536646] [2021-06-12 19:58:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:35,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748536646] [2021-06-12 19:58:35,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748536646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409009031] [2021-06-12 19:58:35,067 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 19:58:35,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:35,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:35,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,180 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 18 treesize of output 14 [2021-06-12 19:58:35,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:35,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:35,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:58:35,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,343 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 19:58:35,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:35,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,372 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 11 treesize of output 7 [2021-06-12 19:58:35,373 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:35,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,375 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 11 treesize of output 7 [2021-06-12 19:58:35,376 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:35,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,397 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 19:58:35,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-12 19:58:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:35,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409009031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:35,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:35,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779097694] [2021-06-12 19:58:35,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:35,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:35,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:35,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:35,453 INFO L87 Difference]: Start difference. First operand 935 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:36,289 INFO L93 Difference]: Finished difference Result 1216 states and 3750 transitions. [2021-06-12 19:58:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:36,290 INFO L225 Difference]: With dead ends: 1216 [2021-06-12 19:58:36,290 INFO L226 Difference]: Without dead ends: 1130 [2021-06-12 19:58:36,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 816.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:58:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-12 19:58:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 963. [2021-06-12 19:58:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.177754677754678) internal successors, (3057), 962 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3057 transitions. [2021-06-12 19:58:36,300 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3057 transitions. Word has length 24 [2021-06-12 19:58:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:36,300 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3057 transitions. [2021-06-12 19:58:36,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3057 transitions. [2021-06-12 19:58:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:36,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:36,301 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:36,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-06-12 19:58:36,502 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:36,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2034088966, now seen corresponding path program 157 times [2021-06-12 19:58:36,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:36,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284587935] [2021-06-12 19:58:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:36,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:36,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284587935] [2021-06-12 19:58:36,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284587935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:36,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645337205] [2021-06-12 19:58:36,649 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 19:58:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:36,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:36,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:36,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:36,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:36,770 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 17 treesize of output 13 [2021-06-12 19:58:36,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:36,773 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 17 treesize of output 13 [2021-06-12 19:58:36,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:36,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:36,823 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 18 treesize of output 14 [2021-06-12 19:58:36,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:36,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:36,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:36,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:36,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:36,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:36,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:58:37,004 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 19:58:37,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,007 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 19:58:37,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,010 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 20 treesize of output 16 [2021-06-12 19:58:37,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:37,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,033 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 13 treesize of output 9 [2021-06-12 19:58:37,034 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:37,038 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:37,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:37,057 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 19:58:37,057 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:79, output treesize:27 [2021-06-12 19:58:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645337205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:37,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:37,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498528516] [2021-06-12 19:58:37,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:37,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:37,103 INFO L87 Difference]: Start difference. First operand 963 states and 3057 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 19:58:37,297 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 19:58:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:37,614 INFO L93 Difference]: Finished difference Result 1209 states and 3699 transitions. [2021-06-12 19:58:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:37,614 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 24 [2021-06-12 19:58:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:37,616 INFO L225 Difference]: With dead ends: 1209 [2021-06-12 19:58:37,616 INFO L226 Difference]: Without dead ends: 1162 [2021-06-12 19:58:37,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-12 19:58:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 957. [2021-06-12 19:58:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.1820083682008367) internal successors, (3042), 956 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3042 transitions. [2021-06-12 19:58:37,626 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3042 transitions. Word has length 24 [2021-06-12 19:58:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:37,626 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3042 transitions. [2021-06-12 19:58:37,626 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 19:58:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3042 transitions. [2021-06-12 19:58:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:37,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:37,627 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:37,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:37,827 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2041582354, now seen corresponding path program 158 times [2021-06-12 19:58:37,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:37,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726219792] [2021-06-12 19:58:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:37,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726219792] [2021-06-12 19:58:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726219792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108384554] [2021-06-12 19:58:37,963 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 19:58:37,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:37,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:38,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,077 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 17 treesize of output 13 [2021-06-12 19:58:38,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,080 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 19:58:38,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,131 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 18 treesize of output 14 [2021-06-12 19:58:38,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,134 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 18 treesize of output 14 [2021-06-12 19:58:38,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:38,181 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:58:38,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,366 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 19:58:38,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,376 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 7 [2021-06-12 19:58:38,377 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:38,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,384 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 19:58:38,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-06-12 19:58:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108384554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:38,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752422635] [2021-06-12 19:58:38,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:38,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:38,417 INFO L87 Difference]: Start difference. First operand 957 states and 3042 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:39,084 INFO L93 Difference]: Finished difference Result 1246 states and 3838 transitions. [2021-06-12 19:58:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:39,086 INFO L225 Difference]: With dead ends: 1246 [2021-06-12 19:58:39,086 INFO L226 Difference]: Without dead ends: 1208 [2021-06-12 19:58:39,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-12 19:58:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 961. [2021-06-12 19:58:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 3.185416666666667) internal successors, (3058), 960 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 3058 transitions. [2021-06-12 19:58:39,102 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 3058 transitions. Word has length 24 [2021-06-12 19:58:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:39,102 INFO L482 AbstractCegarLoop]: Abstraction has 961 states and 3058 transitions. [2021-06-12 19:58:39,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 3058 transitions. [2021-06-12 19:58:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:39,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:39,103 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:39,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1271 [2021-06-12 19:58:39,304 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash 219748462, now seen corresponding path program 159 times [2021-06-12 19:58:39,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:39,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191068835] [2021-06-12 19:58:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:39,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:39,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191068835] [2021-06-12 19:58:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191068835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242969693] [2021-06-12 19:58:39,469 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 19:58:39,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:39,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,582 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 18 treesize of output 14 [2021-06-12 19:58:39,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:39,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:58:39,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-12 19:58:39,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,701 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 19 treesize of output 15 [2021-06-12 19:58:39,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,704 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 19 treesize of output 15 [2021-06-12 19:58:39,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:39,734 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:39,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,736 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 7 [2021-06-12 19:58:39,737 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:39,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,760 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 19:58:39,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-12 19:58:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:39,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242969693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:39,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:39,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398394070] [2021-06-12 19:58:39,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:39,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:39,834 INFO L87 Difference]: Start difference. First operand 961 states and 3058 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 19:58:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:40,448 INFO L93 Difference]: Finished difference Result 1296 states and 3980 transitions. [2021-06-12 19:58:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:40,449 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 24 [2021-06-12 19:58:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:40,450 INFO L225 Difference]: With dead ends: 1296 [2021-06-12 19:58:40,450 INFO L226 Difference]: Without dead ends: 1238 [2021-06-12 19:58:40,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-12 19:58:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 963. [2021-06-12 19:58:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.187110187110187) internal successors, (3066), 962 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3066 transitions. [2021-06-12 19:58:40,460 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3066 transitions. Word has length 24 [2021-06-12 19:58:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:40,460 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3066 transitions. [2021-06-12 19:58:40,461 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 19:58:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3066 transitions. [2021-06-12 19:58:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:40,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:40,462 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:40,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-06-12 19:58:40,662 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:40,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:40,662 INFO L82 PathProgramCache]: Analyzing trace with hash 45856292, now seen corresponding path program 160 times [2021-06-12 19:58:40,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:40,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796611766] [2021-06-12 19:58:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:40,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:40,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796611766] [2021-06-12 19:58:40,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796611766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808945090] [2021-06-12 19:58:40,797 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 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 19:58:40,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:40,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:40,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:40,910 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 18 treesize of output 14 [2021-06-12 19:58:40,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:40,913 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 18 treesize of output 14 [2021-06-12 19:58:40,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:40,963 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 17 treesize of output 13 [2021-06-12 19:58:40,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:40,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:40,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:40,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:41,021 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:58:41,117 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 19:58:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:41,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:41,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,130 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 20 treesize of output 16 [2021-06-12 19:58:41,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,134 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 19 treesize of output 15 [2021-06-12 19:58:41,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:41,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,143 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 20 treesize of output 16 [2021-06-12 19:58:41,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,148 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 20 treesize of output 16 [2021-06-12 19:58:41,148 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:41,152 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,312 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-12 19:58:41,312 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-06-12 19:58:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:41,317 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:41,322 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:41,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,325 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 13 treesize of output 9 [2021-06-12 19:58:41,326 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:41,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:58:41,390 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-06-12 19:58:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:41,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808945090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:41,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872903401] [2021-06-12 19:58:41,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:41,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:41,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:41,521 INFO L87 Difference]: Start difference. First operand 963 states and 3066 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 19:58:41,761 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 19:58:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,263 INFO L93 Difference]: Finished difference Result 1391 states and 4245 transitions. [2021-06-12 19:58:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:42,264 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 24 [2021-06-12 19:58:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,265 INFO L225 Difference]: With dead ends: 1391 [2021-06-12 19:58:42,265 INFO L226 Difference]: Without dead ends: 1303 [2021-06-12 19:58:42,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-12 19:58:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 971. [2021-06-12 19:58:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.2041237113402063) internal successors, (3108), 970 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3108 transitions. [2021-06-12 19:58:42,276 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3108 transitions. Word has length 24 [2021-06-12 19:58:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,276 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 3108 transitions. [2021-06-12 19:58:42,276 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 19:58:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3108 transitions. [2021-06-12 19:58:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:42,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,277 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:42,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,481 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -834417244, now seen corresponding path program 161 times [2021-06-12 19:58:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:42,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930425752] [2021-06-12 19:58:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:42,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:42,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930425752] [2021-06-12 19:58:42,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930425752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909942100] [2021-06-12 19:58:42,674 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 19:58:42,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:58:42,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:42,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,796 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 19:58:42,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,799 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 19:58:42,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,850 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 18 treesize of output 14 [2021-06-12 19:58:42,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,853 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 18 treesize of output 14 [2021-06-12 19:58:42,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:42,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:42,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:42,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-12 19:58:42,996 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 19:58:42,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:42,999 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 20 treesize of output 16 [2021-06-12 19:58:43,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:43,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,007 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 20 treesize of output 16 [2021-06-12 19:58:43,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:43,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,062 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 13 treesize of output 9 [2021-06-12 19:58:43,063 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:43,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,066 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 12 treesize of output 8 [2021-06-12 19:58:43,067 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:43,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:43,072 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:43,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:58:43,076 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:43,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:43,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:43,120 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-06-12 19:58:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:58:43,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909942100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:43,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503461351] [2021-06-12 19:58:43,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:43,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:43,231 INFO L87 Difference]: Start difference. First operand 971 states and 3108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:43,429 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 19:58:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:43,762 INFO L93 Difference]: Finished difference Result 1405 states and 4309 transitions. [2021-06-12 19:58:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:43,763 INFO L225 Difference]: With dead ends: 1405 [2021-06-12 19:58:43,763 INFO L226 Difference]: Without dead ends: 1367 [2021-06-12 19:58:43,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-12 19:58:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 966. [2021-06-12 19:58:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.1968911917098444) internal successors, (3085), 965 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3085 transitions. [2021-06-12 19:58:43,774 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3085 transitions. Word has length 24 [2021-06-12 19:58:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:43,774 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 3085 transitions. [2021-06-12 19:58:43,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3085 transitions. [2021-06-12 19:58:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:43,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:43,775 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:43,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:43,976 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash -931765316, now seen corresponding path program 162 times [2021-06-12 19:58:43,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:43,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974940599] [2021-06-12 19:58:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:44,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:44,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974940599] [2021-06-12 19:58:44,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974940599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460844060] [2021-06-12 19:58:44,102 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 19:58:44,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:44,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:44,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,223 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 17 treesize of output 13 [2021-06-12 19:58:44,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,230 INFO 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 19:58:44,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 19:58:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,278 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 19:58:44,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,280 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 19:58:44,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:44,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:44,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:44,322 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:44,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,345 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 19:58:44,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-12 19:58:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:44,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460844060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:44,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387020215] [2021-06-12 19:58:44,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:44,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:44,407 INFO L87 Difference]: Start difference. First operand 966 states and 3085 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:44,794 INFO L93 Difference]: Finished difference Result 1237 states and 3887 transitions. [2021-06-12 19:58:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:44,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:44,796 INFO L225 Difference]: With dead ends: 1237 [2021-06-12 19:58:44,796 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 19:58:44,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 19:58:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 977. [2021-06-12 19:58:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 3.199795081967213) internal successors, (3123), 976 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 3123 transitions. [2021-06-12 19:58:44,805 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 3123 transitions. Word has length 24 [2021-06-12 19:58:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:44,806 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 3123 transitions. [2021-06-12 19:58:44,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 3123 transitions. [2021-06-12 19:58:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:44,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:44,807 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:45,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-12 19:58:45,007 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash 549210886, now seen corresponding path program 163 times [2021-06-12 19:58:45,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:45,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050025298] [2021-06-12 19:58:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:45,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:45,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050025298] [2021-06-12 19:58:45,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050025298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040119430] [2021-06-12 19:58:45,133 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 19:58:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:45,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,283 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 19:58:45,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,286 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 19:58:45,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,316 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 19:58:45,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-12 19:58:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,383 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 19 treesize of output 15 [2021-06-12 19:58:45,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,387 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 19:58:45,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,460 INFO L628 ElimStorePlain]: treesize reduction 108, result has 43.5 percent of original size [2021-06-12 19:58:45,463 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 19:58:45,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,493 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 7 [2021-06-12 19:58:45,494 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:45,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,519 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:45,520 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 19:58:45,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-06-12 19:58:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:45,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040119430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:45,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354467998] [2021-06-12 19:58:45,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:45,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:45,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:45,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:45,584 INFO L87 Difference]: Start difference. First operand 977 states and 3123 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:45,946 INFO L93 Difference]: Finished difference Result 1225 states and 3858 transitions. [2021-06-12 19:58:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:45,948 INFO L225 Difference]: With dead ends: 1225 [2021-06-12 19:58:45,948 INFO L226 Difference]: Without dead ends: 1165 [2021-06-12 19:58:45,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-12 19:58:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 991. [2021-06-12 19:58:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2040404040404042) internal successors, (3172), 990 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3172 transitions. [2021-06-12 19:58:45,957 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3172 transitions. Word has length 24 [2021-06-12 19:58:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:45,958 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3172 transitions. [2021-06-12 19:58:45,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3172 transitions. [2021-06-12 19:58:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:45,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:45,959 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:46,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1305 [2021-06-12 19:58:46,159 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1180415388, now seen corresponding path program 164 times [2021-06-12 19:58:46,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:46,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855830331] [2021-06-12 19:58:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:46,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855830331] [2021-06-12 19:58:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855830331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271993674] [2021-06-12 19:58:46,316 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 19:58:46,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:46,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:46,400 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 18 treesize of output 14 [2021-06-12 19:58:46,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,403 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 17 treesize of output 13 [2021-06-12 19:58:46,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,405 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 19:58:46,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,408 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 19:58:46,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:46,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:58:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,543 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 19:58:46,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,595 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 20 treesize of output 16 [2021-06-12 19:58:46,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,644 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 12 treesize of output 8 [2021-06-12 19:58:46,645 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:46,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,693 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 19:58:46,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:46,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:46,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,785 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 20 treesize of output 16 [2021-06-12 19:58:46,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:58:46,828 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:46,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:46,875 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 12 treesize of output 8 [2021-06-12 19:58:46,876 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:46,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:46,914 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 19:58:46,914 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 19:58:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:47,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271993674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:47,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:47,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445214113] [2021-06-12 19:58:47,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:47,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:47,048 INFO L87 Difference]: Start difference. First operand 991 states and 3172 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:47,509 INFO L93 Difference]: Finished difference Result 1463 states and 4483 transitions. [2021-06-12 19:58:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:47,510 INFO L225 Difference]: With dead ends: 1463 [2021-06-12 19:58:47,510 INFO L226 Difference]: Without dead ends: 1370 [2021-06-12 19:58:47,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-12 19:58:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1010. [2021-06-12 19:58:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.22001982160555) internal successors, (3249), 1009 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3249 transitions. [2021-06-12 19:58:47,521 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3249 transitions. Word has length 24 [2021-06-12 19:58:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:47,522 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 3249 transitions. [2021-06-12 19:58:47,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3249 transitions. [2021-06-12 19:58:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:47,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:47,523 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-12 19:58:47,724 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1954619758, now seen corresponding path program 165 times [2021-06-12 19:58:47,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:47,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279486579] [2021-06-12 19:58:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:47,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279486579] [2021-06-12 19:58:47,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279486579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990632199] [2021-06-12 19:58:47,901 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 19:58:47,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:47,988 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 19:58:47,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,991 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 18 treesize of output 14 [2021-06-12 19:58:47,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,994 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 18 treesize of output 14 [2021-06-12 19:58:47,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,997 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 17 treesize of output 13 [2021-06-12 19:58:47,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:48,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:58:48,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,156 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 19 treesize of output 15 [2021-06-12 19:58:48,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,180 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 7 [2021-06-12 19:58:48,181 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:48,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:48,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,223 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 7 [2021-06-12 19:58:48,224 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:48,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,242 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 19:58:48,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 19:58:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:48,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990632199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:48,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107744653] [2021-06-12 19:58:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:48,323 INFO L87 Difference]: Start difference. First operand 1010 states and 3249 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:48,706 INFO L93 Difference]: Finished difference Result 1499 states and 4618 transitions. [2021-06-12 19:58:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:48,708 INFO L225 Difference]: With dead ends: 1499 [2021-06-12 19:58:48,708 INFO L226 Difference]: Without dead ends: 1410 [2021-06-12 19:58:48,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-12 19:58:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1014. [2021-06-12 19:58:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.226061204343534) internal successors, (3268), 1013 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3268 transitions. [2021-06-12 19:58:48,720 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3268 transitions. Word has length 24 [2021-06-12 19:58:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:48,720 INFO L482 AbstractCegarLoop]: Abstraction has 1014 states and 3268 transitions. [2021-06-12 19:58:48,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3268 transitions. [2021-06-12 19:58:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:48,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:48,721 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1321,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:48,921 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1658960150, now seen corresponding path program 166 times [2021-06-12 19:58:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:48,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346335691] [2021-06-12 19:58:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:49,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346335691] [2021-06-12 19:58:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346335691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085598941] [2021-06-12 19:58:49,036 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 19:58:49,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:49,144 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 24 treesize of output 18 [2021-06-12 19:58:49,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,147 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 24 treesize of output 18 [2021-06-12 19:58:49,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:49,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 19:58:49,212 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 28 treesize of output 22 [2021-06-12 19:58:49,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,230 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:49,232 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 28 treesize of output 22 [2021-06-12 19:58:49,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:49,248 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-06-12 19:58:49,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:49,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 19:58:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:49,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085598941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:49,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:58:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745656358] [2021-06-12 19:58:49,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:49,328 INFO L87 Difference]: Start difference. First operand 1014 states and 3268 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 19:58:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:49,583 INFO L93 Difference]: Finished difference Result 1278 states and 4001 transitions. [2021-06-12 19:58:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:49,583 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 24 [2021-06-12 19:58:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:49,585 INFO L225 Difference]: With dead ends: 1278 [2021-06-12 19:58:49,585 INFO L226 Difference]: Without dead ends: 1240 [2021-06-12 19:58:49,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-12 19:58:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1007. [2021-06-12 19:58:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2027833001988073) internal successors, (3222), 1006 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3222 transitions. [2021-06-12 19:58:49,595 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3222 transitions. Word has length 24 [2021-06-12 19:58:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:49,595 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3222 transitions. [2021-06-12 19:58:49,595 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 19:58:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3222 transitions. [2021-06-12 19:58:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:49,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:49,596 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:49,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-06-12 19:58:49,797 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1932983276, now seen corresponding path program 167 times [2021-06-12 19:58:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960989420] [2021-06-12 19:58:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:49,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960989420] [2021-06-12 19:58:49,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960989420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085149766] [2021-06-12 19:58:49,937 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 19:58:49,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:58:49,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:49,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:50,014 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 24 treesize of output 18 [2021-06-12 19:58:50,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-06-12 19:58:50,038 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 28 treesize of output 22 [2021-06-12 19:58:50,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,040 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 28 treesize of output 22 [2021-06-12 19:58:50,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,057 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:50,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:50,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-12 19:58:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:50,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085149766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:50,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:50,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533387608] [2021-06-12 19:58:50,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:50,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:50,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:50,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:50,139 INFO L87 Difference]: Start difference. First operand 1007 states and 3222 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 19:58:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:50,510 INFO L93 Difference]: Finished difference Result 1306 states and 4085 transitions. [2021-06-12 19:58:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:50,510 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 24 [2021-06-12 19:58:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:50,512 INFO L225 Difference]: With dead ends: 1306 [2021-06-12 19:58:50,512 INFO L226 Difference]: Without dead ends: 1247 [2021-06-12 19:58:50,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-12 19:58:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 982. [2021-06-12 19:58:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.182466870540265) internal successors, (3122), 981 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3122 transitions. [2021-06-12 19:58:50,522 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3122 transitions. Word has length 24 [2021-06-12 19:58:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:50,522 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3122 transitions. [2021-06-12 19:58:50,522 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 19:58:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3122 transitions. [2021-06-12 19:58:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:50,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:50,523 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:50,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1339,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:50,723 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:50,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1372052590, now seen corresponding path program 168 times [2021-06-12 19:58:50,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:50,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529609867] [2021-06-12 19:58:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:50,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529609867] [2021-06-12 19:58:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529609867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903430800] [2021-06-12 19:58:50,881 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 19:58:50,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:50,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:50,949 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 24 treesize of output 18 [2021-06-12 19:58:50,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,951 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 24 treesize of output 18 [2021-06-12 19:58:50,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:50,967 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 19:58:51,027 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 28 treesize of output 22 [2021-06-12 19:58:51,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,029 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 28 treesize of output 22 [2021-06-12 19:58:51,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:51,046 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:58:51,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:51,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-12 19:58:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903430800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:51,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:58:51,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890925690] [2021-06-12 19:58:51,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:51,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:51,130 INFO L87 Difference]: Start difference. First operand 982 states and 3122 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 19:58:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:51,446 INFO L93 Difference]: Finished difference Result 1428 states and 4458 transitions. [2021-06-12 19:58:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:51,446 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 24 [2021-06-12 19:58:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:51,447 INFO L225 Difference]: With dead ends: 1428 [2021-06-12 19:58:51,447 INFO L226 Difference]: Without dead ends: 1366 [2021-06-12 19:58:51,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-12 19:58:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 982. [2021-06-12 19:58:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.182466870540265) internal successors, (3122), 981 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3122 transitions. [2021-06-12 19:58:51,458 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3122 transitions. Word has length 24 [2021-06-12 19:58:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:51,458 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3122 transitions. [2021-06-12 19:58:51,458 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 19:58:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3122 transitions. [2021-06-12 19:58:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:51,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:51,459 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:51,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-12 19:58:51,660 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -358373054, now seen corresponding path program 169 times [2021-06-12 19:58:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:51,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989304848] [2021-06-12 19:58:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:51,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:51,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989304848] [2021-06-12 19:58:51,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989304848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049284800] [2021-06-12 19:58:51,859 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 19:58:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:51,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:58:51,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,926 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 18 treesize of output 14 [2021-06-12 19:58:51,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,929 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 18 treesize of output 14 [2021-06-12 19:58:51,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,931 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 17 treesize of output 13 [2021-06-12 19:58:51,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:51,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:51,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:51,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:58:52,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,133 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 20 treesize of output 16 [2021-06-12 19:58:52,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,193 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 19:58:52,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,243 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 12 treesize of output 8 [2021-06-12 19:58:52,244 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:52,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:58:52,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,339 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 12 treesize of output 8 [2021-06-12 19:58:52,340 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:52,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,385 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 7 [2021-06-12 19:58:52,386 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:52,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,429 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 19:58:52,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,471 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 7 [2021-06-12 19:58:52,473 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:52,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,511 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 19:58:52,511 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 19:58:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:52,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049284800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:52,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902996606] [2021-06-12 19:58:52,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:52,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:52,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:52,648 INFO L87 Difference]: Start difference. First operand 982 states and 3122 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:53,556 INFO L93 Difference]: Finished difference Result 1796 states and 5502 transitions. [2021-06-12 19:58:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:53,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:53,558 INFO L225 Difference]: With dead ends: 1796 [2021-06-12 19:58:53,558 INFO L226 Difference]: Without dead ends: 1703 [2021-06-12 19:58:53,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 980.9ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-06-12 19:58:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1015. [2021-06-12 19:58:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.206114398422091) internal successors, (3251), 1014 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3251 transitions. [2021-06-12 19:58:53,571 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3251 transitions. Word has length 24 [2021-06-12 19:58:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:53,571 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3251 transitions. [2021-06-12 19:58:53,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3251 transitions. [2021-06-12 19:58:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:53,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:53,572 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:53,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:53,773 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 415831316, now seen corresponding path program 170 times [2021-06-12 19:58:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065083141] [2021-06-12 19:58:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:54,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:54,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065083141] [2021-06-12 19:58:54,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065083141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361428048] [2021-06-12 19:58:54,040 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 19:58:54,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:54,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:54,106 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 19:58:54,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,109 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 18 treesize of output 14 [2021-06-12 19:58:54,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,111 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 17 treesize of output 13 [2021-06-12 19:58:54,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,114 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 18 treesize of output 14 [2021-06-12 19:58:54,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:54,151 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:58:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,320 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 19 treesize of output 15 [2021-06-12 19:58:54,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,344 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 11 treesize of output 7 [2021-06-12 19:58:54,345 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:54,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,366 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 19:58:54,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,387 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 11 treesize of output 7 [2021-06-12 19:58:54,388 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:54,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:54,405 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 19:58:54,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 19:58:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:54,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361428048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:54,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:54,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465011685] [2021-06-12 19:58:54,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:54,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:54,487 INFO L87 Difference]: Start difference. First operand 1015 states and 3251 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:55,043 INFO L93 Difference]: Finished difference Result 1777 states and 5483 transitions. [2021-06-12 19:58:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:55,045 INFO L225 Difference]: With dead ends: 1777 [2021-06-12 19:58:55,045 INFO L226 Difference]: Without dead ends: 1688 [2021-06-12 19:58:55,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 707.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-06-12 19:58:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1018. [2021-06-12 19:58:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.2114060963618485) internal successors, (3266), 1017 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3266 transitions. [2021-06-12 19:58:55,057 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3266 transitions. Word has length 24 [2021-06-12 19:58:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:55,057 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 3266 transitions. [2021-06-12 19:58:55,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3266 transitions. [2021-06-12 19:58:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:55,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:55,058 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:55,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1357 [2021-06-12 19:58:55,258 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:55,259 INFO L82 PathProgramCache]: Analyzing trace with hash 253826086, now seen corresponding path program 171 times [2021-06-12 19:58:55,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:55,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371593056] [2021-06-12 19:58:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:55,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371593056] [2021-06-12 19:58:55,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371593056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208854161] [2021-06-12 19:58:55,439 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 19:58:55,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:55,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:55,506 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 18 treesize of output 14 [2021-06-12 19:58:55,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,508 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 17 treesize of output 13 [2021-06-12 19:58:55,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,511 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 18 treesize of output 14 [2021-06-12 19:58:55,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,513 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 19:58:55,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:55,550 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:58:55,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,699 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 19:58:55,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:55,723 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:55,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,746 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 19 treesize of output 15 [2021-06-12 19:58:55,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,767 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 7 [2021-06-12 19:58:55,768 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:55,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,786 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 19:58:55,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 19:58:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:55,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208854161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:55,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485415269] [2021-06-12 19:58:55,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:55,867 INFO L87 Difference]: Start difference. First operand 1018 states and 3266 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:56,405 INFO L93 Difference]: Finished difference Result 1972 states and 6142 transitions. [2021-06-12 19:58:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:56,408 INFO L225 Difference]: With dead ends: 1972 [2021-06-12 19:58:56,408 INFO L226 Difference]: Without dead ends: 1910 [2021-06-12 19:58:56,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2021-06-12 19:58:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 984. [2021-06-12 19:58:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.1841302136317395) internal successors, (3130), 983 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3130 transitions. [2021-06-12 19:58:56,421 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3130 transitions. Word has length 24 [2021-06-12 19:58:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:56,421 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3130 transitions. [2021-06-12 19:58:56,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3130 transitions. [2021-06-12 19:58:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:56,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:56,422 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:56,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:56,622 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 678435982, now seen corresponding path program 172 times [2021-06-12 19:58:56,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:56,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069065560] [2021-06-12 19:58:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:56,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:56,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069065560] [2021-06-12 19:58:56,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069065560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905031612] [2021-06-12 19:58:56,812 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 19:58:56,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:58:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:56,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:56,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:56,940 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 19:58:56,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:57,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:57,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,020 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 19:58:57,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:57,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:58:57,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:58:57,267 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:58:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,271 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 19:58:57,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,274 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 20 treesize of output 16 [2021-06-12 19:58:57,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,278 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 20 treesize of output 16 [2021-06-12 19:58:57,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:57,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,369 INFO L628 ElimStorePlain]: treesize reduction 60, result has 65.1 percent of original size [2021-06-12 19:58:57,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,372 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 11 treesize of output 7 [2021-06-12 19:58:57,373 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,376 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 13 treesize of output 9 [2021-06-12 19:58:57,377 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:57,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:57,416 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 19:58:57,416 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:50 [2021-06-12 19:58:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905031612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:57,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:57,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205693628] [2021-06-12 19:58:57,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:57,494 INFO L87 Difference]: Start difference. First operand 984 states and 3130 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:58,043 INFO L93 Difference]: Finished difference Result 1111 states and 3498 transitions. [2021-06-12 19:58:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:58,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:58,044 INFO L225 Difference]: With dead ends: 1111 [2021-06-12 19:58:58,044 INFO L226 Difference]: Without dead ends: 1058 [2021-06-12 19:58:58,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-12 19:58:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 996. [2021-06-12 19:58:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.1829145728643216) internal successors, (3167), 995 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3167 transitions. [2021-06-12 19:58:58,053 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3167 transitions. Word has length 24 [2021-06-12 19:58:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:58,054 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3167 transitions. [2021-06-12 19:58:58,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3167 transitions. [2021-06-12 19:58:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:58,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:58,055 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:58,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-06-12 19:58:58,255 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1289894484, now seen corresponding path program 173 times [2021-06-12 19:58:58,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:58,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944053437] [2021-06-12 19:58:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:58,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944053437] [2021-06-12 19:58:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944053437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710754099] [2021-06-12 19:58:58,467 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 19:58:58,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:58,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:58:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:58,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:58,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:58:58,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,580 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 19:58:58,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-06-12 19:58:58,653 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:58:58,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,657 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 20 treesize of output 16 [2021-06-12 19:58:58,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,662 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 19 treesize of output 15 [2021-06-12 19:58:58,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,667 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 20 treesize of output 16 [2021-06-12 19:58:58,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,671 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 19:58:58,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,735 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 12 treesize of output 8 [2021-06-12 19:58:58,736 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:58,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,740 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 13 treesize of output 9 [2021-06-12 19:58:58,741 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:58,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,744 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 13 treesize of output 9 [2021-06-12 19:58:58,745 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:58:58,749 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:58,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,805 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 19:58:58,806 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-12 19:58:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:58:58,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710754099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:58,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:58,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256568658] [2021-06-12 19:58:58,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:58,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:58,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:58,923 INFO L87 Difference]: Start difference. First operand 996 states and 3167 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:59,763 INFO L93 Difference]: Finished difference Result 1227 states and 3825 transitions. [2021-06-12 19:58:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:58:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:59,765 INFO L225 Difference]: With dead ends: 1227 [2021-06-12 19:58:59,765 INFO L226 Difference]: Without dead ends: 1161 [2021-06-12 19:58:59,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 820.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-12 19:58:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 999. [2021-06-12 19:58:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.1833667334669338) internal successors, (3177), 998 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3177 transitions. [2021-06-12 19:58:59,775 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3177 transitions. Word has length 24 [2021-06-12 19:58:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:59,775 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 3177 transitions. [2021-06-12 19:58:59,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:58:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3177 transitions. [2021-06-12 19:58:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:58:59,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:59,781 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:59,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-12 19:58:59,986 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:59,986 INFO L82 PathProgramCache]: Analyzing trace with hash 661192566, now seen corresponding path program 174 times [2021-06-12 19:58:59,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:59,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131299166] [2021-06-12 19:58:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:00,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131299166] [2021-06-12 19:59:00,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131299166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644308777] [2021-06-12 19:59:00,138 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 19:59:00,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:00,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:00,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:59:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:00,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,261 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 19 treesize of output 15 [2021-06-12 19:59:00,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,290 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 19:59:00,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 19:59:00,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 19:59:00,377 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:59:00,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,381 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 19:59:00,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,385 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 20 treesize of output 16 [2021-06-12 19:59:00,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,388 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 20 treesize of output 16 [2021-06-12 19:59:00,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,392 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 19:59:00,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:00,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,454 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 7 [2021-06-12 19:59:00,455 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,459 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 13 treesize of output 9 [2021-06-12 19:59:00,460 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:00,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,463 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 12 treesize of output 8 [2021-06-12 19:59:00,464 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:00,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:00,467 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 13 treesize of output 9 [2021-06-12 19:59:00,468 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:00,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:00,524 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 19:59:00,525 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-06-12 19:59:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644308777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:00,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:00,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616248625] [2021-06-12 19:59:00,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:00,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:00,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:00,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:00,645 INFO L87 Difference]: Start difference. First operand 999 states and 3177 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:01,153 INFO L93 Difference]: Finished difference Result 1168 states and 3613 transitions. [2021-06-12 19:59:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:01,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:01,155 INFO L225 Difference]: With dead ends: 1168 [2021-06-12 19:59:01,155 INFO L226 Difference]: Without dead ends: 1137 [2021-06-12 19:59:01,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-12 19:59:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 998. [2021-06-12 19:59:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.181544633901705) internal successors, (3172), 997 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3172 transitions. [2021-06-12 19:59:01,165 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3172 transitions. Word has length 24 [2021-06-12 19:59:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:01,165 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3172 transitions. [2021-06-12 19:59:01,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3172 transitions. [2021-06-12 19:59:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:01,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:01,166 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:01,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-12 19:59:01,366 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash -839302772, now seen corresponding path program 175 times [2021-06-12 19:59:01,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:01,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116707478] [2021-06-12 19:59:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:01,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:01,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116707478] [2021-06-12 19:59:01,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116707478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048440685] [2021-06-12 19:59:01,522 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 19:59:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,657 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 19:59:01,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,660 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 19:59:01,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,735 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 19:59:01,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:01,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:01,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 19:59:01,972 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 19:59:01,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,976 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 19:59:01,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,979 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 19 treesize of output 15 [2021-06-12 19:59:01,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,983 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 30 treesize of output 24 [2021-06-12 19:59:01,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,986 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 29 treesize of output 23 [2021-06-12 19:59:01,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,071 INFO L628 ElimStorePlain]: treesize reduction 57, result has 64.8 percent of original size [2021-06-12 19:59:02,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,074 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 11 treesize of output 7 [2021-06-12 19:59:02,075 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:02,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,078 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 8 [2021-06-12 19:59:02,079 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:02,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:02,117 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 19:59:02,117 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:47 [2021-06-12 19:59:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:02,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048440685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:02,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:02,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932560693] [2021-06-12 19:59:02,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:02,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:02,194 INFO L87 Difference]: Start difference. First operand 998 states and 3172 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:02,738 INFO L93 Difference]: Finished difference Result 1154 states and 3567 transitions. [2021-06-12 19:59:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:02,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:02,739 INFO L225 Difference]: With dead ends: 1154 [2021-06-12 19:59:02,739 INFO L226 Difference]: Without dead ends: 1077 [2021-06-12 19:59:02,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-12 19:59:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 996. [2021-06-12 19:59:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.1829145728643216) internal successors, (3167), 995 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3167 transitions. [2021-06-12 19:59:02,749 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3167 transitions. Word has length 24 [2021-06-12 19:59:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:02,749 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3167 transitions. [2021-06-12 19:59:02,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3167 transitions. [2021-06-12 19:59:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:02,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:02,750 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1405 [2021-06-12 19:59:02,953 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 979223708, now seen corresponding path program 176 times [2021-06-12 19:59:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878783158] [2021-06-12 19:59:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:03,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878783158] [2021-06-12 19:59:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878783158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814608644] [2021-06-12 19:59:03,157 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 19:59:03,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:03,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:03,259 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 17 treesize of output 13 [2021-06-12 19:59:03,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,263 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 18 treesize of output 14 [2021-06-12 19:59:03,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,272 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 18 treesize of output 14 [2021-06-12 19:59:03,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,275 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 17 treesize of output 13 [2021-06-12 19:59:03,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:03,323 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:59:03,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:03,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,467 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 20 treesize of output 16 [2021-06-12 19:59:03,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,516 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 12 treesize of output 8 [2021-06-12 19:59:03,517 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:03,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,564 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 20 treesize of output 16 [2021-06-12 19:59:03,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,609 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 12 treesize of output 8 [2021-06-12 19:59:03,611 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:03,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,654 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 19:59:03,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,697 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 7 [2021-06-12 19:59:03,698 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:03,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:59:03,740 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:03,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,778 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 19:59:03,778 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 19:59:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814608644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:03,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048633333] [2021-06-12 19:59:03,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:03,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:03,915 INFO L87 Difference]: Start difference. First operand 996 states and 3167 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:04,412 INFO L93 Difference]: Finished difference Result 1330 states and 4095 transitions. [2021-06-12 19:59:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:04,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:04,414 INFO L225 Difference]: With dead ends: 1330 [2021-06-12 19:59:04,414 INFO L226 Difference]: Without dead ends: 1237 [2021-06-12 19:59:04,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-12 19:59:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1015. [2021-06-12 19:59:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.1992110453648914) internal successors, (3244), 1014 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3244 transitions. [2021-06-12 19:59:04,425 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3244 transitions. Word has length 24 [2021-06-12 19:59:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:04,426 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3244 transitions. [2021-06-12 19:59:04,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3244 transitions. [2021-06-12 19:59:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:04,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:04,427 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:04,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:04,629 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1753428078, now seen corresponding path program 177 times [2021-06-12 19:59:04,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:04,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372651970] [2021-06-12 19:59:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:04,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372651970] [2021-06-12 19:59:04,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372651970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886060921] [2021-06-12 19:59:04,902 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 19:59:04,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:04,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:05,011 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 17 treesize of output 13 [2021-06-12 19:59:05,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,014 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 17 treesize of output 13 [2021-06-12 19:59:05,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,016 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 18 treesize of output 14 [2021-06-12 19:59:05,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,018 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 18 treesize of output 14 [2021-06-12 19:59:05,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:05,062 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 19:59:05,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,184 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 19:59:05,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,211 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 7 [2021-06-12 19:59:05,212 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:05,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,237 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 19 treesize of output 15 [2021-06-12 19:59:05,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:05,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:05,259 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 7 [2021-06-12 19:59:05,261 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:05,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:05,281 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 19:59:05,281 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 19:59:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:05,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886060921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:05,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:05,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:05,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150284748] [2021-06-12 19:59:05,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:05,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:05,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:05,365 INFO L87 Difference]: Start difference. First operand 1015 states and 3244 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:05,593 INFO L93 Difference]: Finished difference Result 1170 states and 3662 transitions. [2021-06-12 19:59:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:05,594 INFO L225 Difference]: With dead ends: 1170 [2021-06-12 19:59:05,594 INFO L226 Difference]: Without dead ends: 1108 [2021-06-12 19:59:05,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-12 19:59:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 994. [2021-06-12 19:59:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 3.1842900302114803) internal successors, (3162), 993 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 3162 transitions. [2021-06-12 19:59:05,604 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 3162 transitions. Word has length 24 [2021-06-12 19:59:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:05,604 INFO L482 AbstractCegarLoop]: Abstraction has 994 states and 3162 transitions. [2021-06-12 19:59:05,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 3162 transitions. [2021-06-12 19:59:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:05,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:05,605 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:05,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1424 [2021-06-12 19:59:05,806 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:05,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:05,806 INFO L82 PathProgramCache]: Analyzing trace with hash 252028874, now seen corresponding path program 178 times [2021-06-12 19:59:05,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:05,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113349947] [2021-06-12 19:59:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:06,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:06,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113349947] [2021-06-12 19:59:06,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113349947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493891408] [2021-06-12 19:59:06,008 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 19:59:06,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:06,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:06,078 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 18 treesize of output 14 [2021-06-12 19:59:06,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,081 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 19:59:06,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,083 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 17 treesize of output 13 [2021-06-12 19:59:06,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,086 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 18 treesize of output 14 [2021-06-12 19:59:06,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:06,122 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:06,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:59:06,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,285 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 20 treesize of output 16 [2021-06-12 19:59:06,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,452 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-12 19:59:06,452 INFO L628 ElimStorePlain]: treesize reduction 151, result has 56.5 percent of original size [2021-06-12 19:59:06,452 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:06,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,456 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 20 treesize of output 16 [2021-06-12 19:59:06,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,460 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 20 treesize of output 16 [2021-06-12 19:59:06,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:59:06,530 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:06,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 19:59:06,534 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:06,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,606 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 19 treesize of output 15 [2021-06-12 19:59:06,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,676 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 7 [2021-06-12 19:59:06,677 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:06,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:06,740 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,799 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 7 [2021-06-12 19:59:06,800 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:06,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:59:06,857 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-12 19:59:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:06,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493891408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:06,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077355569] [2021-06-12 19:59:06,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:06,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:06,995 INFO L87 Difference]: Start difference. First operand 994 states and 3162 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:07,330 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-12 19:59:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:08,206 INFO L93 Difference]: Finished difference Result 1567 states and 4845 transitions. [2021-06-12 19:59:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:59:08,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:08,209 INFO L225 Difference]: With dead ends: 1567 [2021-06-12 19:59:08,209 INFO L226 Difference]: Without dead ends: 1487 [2021-06-12 19:59:08,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1297.2ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-12 19:59:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1030. [2021-06-12 19:59:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.207968901846453) internal successors, (3301), 1029 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3301 transitions. [2021-06-12 19:59:08,221 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3301 transitions. Word has length 24 [2021-06-12 19:59:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:08,221 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3301 transitions. [2021-06-12 19:59:08,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3301 transitions. [2021-06-12 19:59:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:08,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:08,222 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:08,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1433 [2021-06-12 19:59:08,422 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2091851372, now seen corresponding path program 179 times [2021-06-12 19:59:08,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:08,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928364606] [2021-06-12 19:59:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:08,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:08,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928364606] [2021-06-12 19:59:08,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928364606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582571133] [2021-06-12 19:59:08,665 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 19:59:08,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:08,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:08,737 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 18 treesize of output 14 [2021-06-12 19:59:08,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,740 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 18 treesize of output 14 [2021-06-12 19:59:08,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,742 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 19:59:08,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,745 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 19:59:08,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:08,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:59:08,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,979 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 19 treesize of output 15 [2021-06-12 19:59:08,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,029 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 11 treesize of output 7 [2021-06-12 19:59:09,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:09,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,077 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 8 [2021-06-12 19:59:09,078 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:09,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,131 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 19:59:09,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,176 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 11 treesize of output 7 [2021-06-12 19:59:09,177 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:09,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,220 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 20 treesize of output 16 [2021-06-12 19:59:09,221 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,264 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 12 treesize of output 8 [2021-06-12 19:59:09,265 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:09,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:09,303 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 19:59:09,303 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 19:59:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:09,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582571133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:09,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:09,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041068597] [2021-06-12 19:59:09,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:09,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:09,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:09,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:09,423 INFO L87 Difference]: Start difference. First operand 1030 states and 3301 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:10,153 INFO L93 Difference]: Finished difference Result 1548 states and 4742 transitions. [2021-06-12 19:59:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:10,155 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 19:59:10,155 INFO L226 Difference]: Without dead ends: 1478 [2021-06-12 19:59:10,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 905.6ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-12 19:59:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1020. [2021-06-12 19:59:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.199214916584887) internal successors, (3260), 1019 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3260 transitions. [2021-06-12 19:59:10,167 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3260 transitions. Word has length 24 [2021-06-12 19:59:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:10,167 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3260 transitions. [2021-06-12 19:59:10,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3260 transitions. [2021-06-12 19:59:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:10,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:10,168 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:10,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-06-12 19:59:10,369 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash 193723210, now seen corresponding path program 180 times [2021-06-12 19:59:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:10,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370451804] [2021-06-12 19:59:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:59:10,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:10,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370451804] [2021-06-12 19:59:10,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370451804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939190098] [2021-06-12 19:59:10,556 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 19:59:10,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:10,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:10,630 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 17 treesize of output 13 [2021-06-12 19:59:10,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,633 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 18 treesize of output 14 [2021-06-12 19:59:10,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,635 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 18 treesize of output 14 [2021-06-12 19:59:10,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,638 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 17 treesize of output 13 [2021-06-12 19:59:10,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:10,674 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,874 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 19:59:10,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,898 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 11 treesize of output 7 [2021-06-12 19:59:10,899 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:10,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,921 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 19 treesize of output 15 [2021-06-12 19:59:10,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,942 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 11 treesize of output 7 [2021-06-12 19:59:10,943 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:10,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,961 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 19:59:10,961 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 19:59:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:59:11,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939190098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:11,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:11,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829808991] [2021-06-12 19:59:11,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:11,043 INFO L87 Difference]: Start difference. First operand 1020 states and 3260 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:11,751 INFO L93 Difference]: Finished difference Result 1573 states and 4851 transitions. [2021-06-12 19:59:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:11,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:11,753 INFO L225 Difference]: With dead ends: 1573 [2021-06-12 19:59:11,753 INFO L226 Difference]: Without dead ends: 1504 [2021-06-12 19:59:11,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-06-12 19:59:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1024. [2021-06-12 19:59:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.2023460410557183) internal successors, (3276), 1023 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3276 transitions. [2021-06-12 19:59:11,764 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3276 transitions. Word has length 24 [2021-06-12 19:59:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:11,764 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3276 transitions. [2021-06-12 19:59:11,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3276 transitions. [2021-06-12 19:59:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:11,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:11,765 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:11,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-06-12 19:59:11,966 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -332560710, now seen corresponding path program 181 times [2021-06-12 19:59:11,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:11,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096846231] [2021-06-12 19:59:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:12,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:12,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096846231] [2021-06-12 19:59:12,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096846231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030336030] [2021-06-12 19:59:12,134 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 19:59:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:12,203 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 18 treesize of output 14 [2021-06-12 19:59:12,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,206 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 18 treesize of output 14 [2021-06-12 19:59:12,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,209 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 17 treesize of output 13 [2021-06-12 19:59:12,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,211 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 17 treesize of output 13 [2021-06-12 19:59:12,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:12,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,435 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 27 treesize of output 21 [2021-06-12 19:59:12,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,439 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 27 treesize of output 21 [2021-06-12 19:59:12,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,520 INFO L628 ElimStorePlain]: treesize reduction 52, result has 65.1 percent of original size [2021-06-12 19:59:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,522 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 11 treesize of output 7 [2021-06-12 19:59:12,523 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:12,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,559 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 20 treesize of output 16 [2021-06-12 19:59:12,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,562 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 19:59:12,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,593 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 8 [2021-06-12 19:59:12,594 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:12,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:12,622 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-12 19:59:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:12,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030336030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:12,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92627023] [2021-06-12 19:59:12,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:12,697 INFO L87 Difference]: Start difference. First operand 1024 states and 3276 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:13,630 INFO L93 Difference]: Finished difference Result 1619 states and 4937 transitions. [2021-06-12 19:59:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:59:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:13,632 INFO L225 Difference]: With dead ends: 1619 [2021-06-12 19:59:13,632 INFO L226 Difference]: Without dead ends: 1542 [2021-06-12 19:59:13,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 876.8ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-06-12 19:59:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1028. [2021-06-12 19:59:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.201557935735151) internal successors, (3288), 1027 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3288 transitions. [2021-06-12 19:59:13,644 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3288 transitions. Word has length 24 [2021-06-12 19:59:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:13,644 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3288 transitions. [2021-06-12 19:59:13,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3288 transitions. [2021-06-12 19:59:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:13,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:13,645 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:13,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1456,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:13,845 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1988570202, now seen corresponding path program 182 times [2021-06-12 19:59:13,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:13,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717090768] [2021-06-12 19:59:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:13,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:13,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717090768] [2021-06-12 19:59:13,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717090768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87474023] [2021-06-12 19:59:13,981 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 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 19:59:14,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:14,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:14,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:14,070 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 19:59:14,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,073 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 18 treesize of output 14 [2021-06-12 19:59:14,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,075 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 19:59:14,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,078 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 18 treesize of output 14 [2021-06-12 19:59:14,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:14,113 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:14,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,320 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 19 treesize of output 15 [2021-06-12 19:59:14,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:59:14,328 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:14,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,334 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 19:59:14,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-12 19:59:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:14,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87474023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:14,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:14,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322266233] [2021-06-12 19:59:14,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:14,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:14,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:14,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:14,369 INFO L87 Difference]: Start difference. First operand 1028 states and 3288 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:14,804 INFO L93 Difference]: Finished difference Result 1489 states and 4612 transitions. [2021-06-12 19:59:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:14,806 INFO L225 Difference]: With dead ends: 1489 [2021-06-12 19:59:14,806 INFO L226 Difference]: Without dead ends: 1401 [2021-06-12 19:59:14,806 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-12 19:59:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1017. [2021-06-12 19:59:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.202755905511811) internal successors, (3254), 1016 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3254 transitions. [2021-06-12 19:59:14,817 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3254 transitions. Word has length 24 [2021-06-12 19:59:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:14,817 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3254 transitions. [2021-06-12 19:59:14,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3254 transitions. [2021-06-12 19:59:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:14,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:14,818 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:15,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-06-12 19:59:15,019 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:15,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1318679352, now seen corresponding path program 183 times [2021-06-12 19:59:15,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:15,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195393120] [2021-06-12 19:59:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:15,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195393120] [2021-06-12 19:59:15,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195393120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159488915] [2021-06-12 19:59:15,120 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 19:59:15,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:15,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:15,214 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 26 treesize of output 20 [2021-06-12 19:59:15,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,216 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 25 treesize of output 19 [2021-06-12 19:59:15,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:15,226 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:37 [2021-06-12 19:59:15,291 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 27 treesize of output 21 [2021-06-12 19:59:15,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,293 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 27 treesize of output 21 [2021-06-12 19:59:15,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:15,298 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:15,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:12 [2021-06-12 19:59:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:15,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159488915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:15,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:15,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439423900] [2021-06-12 19:59:15,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:15,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:15,331 INFO L87 Difference]: Start difference. First operand 1017 states and 3254 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:16,110 INFO L93 Difference]: Finished difference Result 1523 states and 4703 transitions. [2021-06-12 19:59:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:59:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:16,112 INFO L225 Difference]: With dead ends: 1523 [2021-06-12 19:59:16,112 INFO L226 Difference]: Without dead ends: 1390 [2021-06-12 19:59:16,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:59:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-12 19:59:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1040. [2021-06-12 19:59:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.196342637151107) internal successors, (3321), 1039 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3321 transitions. [2021-06-12 19:59:16,123 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3321 transitions. Word has length 24 [2021-06-12 19:59:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:16,123 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3321 transitions. [2021-06-12 19:59:16,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3321 transitions. [2021-06-12 19:59:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:16,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:16,129 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:16,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-06-12 19:59:16,330 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash 874027726, now seen corresponding path program 184 times [2021-06-12 19:59:16,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:16,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106840502] [2021-06-12 19:59:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:16,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106840502] [2021-06-12 19:59:16,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106840502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57867344] [2021-06-12 19:59:16,412 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 19:59:16,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:16,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:16,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:16,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:16,495 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 26 treesize of output 20 [2021-06-12 19:59:16,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,497 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 25 treesize of output 19 [2021-06-12 19:59:16,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:16,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-06-12 19:59:16,572 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 19:59:16,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,577 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 11 treesize of output 7 [2021-06-12 19:59:16,578 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:16,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2021-06-12 19:59:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57867344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:16,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:16,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748833122] [2021-06-12 19:59:16,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:16,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:16,613 INFO L87 Difference]: Start difference. First operand 1040 states and 3321 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:17,463 INFO L93 Difference]: Finished difference Result 1552 states and 4806 transitions. [2021-06-12 19:59:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:59:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:17,465 INFO L225 Difference]: With dead ends: 1552 [2021-06-12 19:59:17,465 INFO L226 Difference]: Without dead ends: 1475 [2021-06-12 19:59:17,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:59:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-12 19:59:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1043. [2021-06-12 19:59:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 3.195777351247601) internal successors, (3330), 1042 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 3330 transitions. [2021-06-12 19:59:17,477 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 3330 transitions. Word has length 24 [2021-06-12 19:59:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:17,477 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 3330 transitions. [2021-06-12 19:59:17,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 3330 transitions. [2021-06-12 19:59:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:17,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:17,478 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:17,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:17,678 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash -863944090, now seen corresponding path program 185 times [2021-06-12 19:59:17,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:17,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501103567] [2021-06-12 19:59:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:17,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:17,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501103567] [2021-06-12 19:59:17,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501103567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606390804] [2021-06-12 19:59:17,780 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 19:59:17,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:17,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:17,863 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 26 treesize of output 20 [2021-06-12 19:59:17,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,865 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 25 treesize of output 19 [2021-06-12 19:59:17,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:17,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-06-12 19:59:17,922 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 19 treesize of output 15 [2021-06-12 19:59:17,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,924 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 20 treesize of output 16 [2021-06-12 19:59:17,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,937 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 7 [2021-06-12 19:59:17,938 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:17,939 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 12 treesize of output 8 [2021-06-12 19:59:17,941 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:17,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:17,951 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:27 [2021-06-12 19:59:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:18,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606390804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:18,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:18,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27087677] [2021-06-12 19:59:18,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:18,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:18,011 INFO L87 Difference]: Start difference. First operand 1043 states and 3330 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:19,014 INFO L93 Difference]: Finished difference Result 1649 states and 5095 transitions. [2021-06-12 19:59:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:59:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:19,016 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 19:59:19,016 INFO L226 Difference]: Without dead ends: 1568 [2021-06-12 19:59:19,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:59:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-06-12 19:59:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1046. [2021-06-12 19:59:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.1942583732057415) internal successors, (3338), 1045 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3338 transitions. [2021-06-12 19:59:19,028 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3338 transitions. Word has length 24 [2021-06-12 19:59:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:19,028 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3338 transitions. [2021-06-12 19:59:19,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3338 transitions. [2021-06-12 19:59:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:19,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:19,030 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:19,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:19,231 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash -885262936, now seen corresponding path program 186 times [2021-06-12 19:59:19,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:19,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551803406] [2021-06-12 19:59:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:19,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:19,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551803406] [2021-06-12 19:59:19,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551803406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318289002] [2021-06-12 19:59:19,362 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 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 19:59:19,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:19,437 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 27 treesize of output 21 [2021-06-12 19:59:19,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:19,441 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 26 treesize of output 20 [2021-06-12 19:59:19,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:59:19,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:19,447 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 26 treesize of output 20 [2021-06-12 19:59:19,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:19,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:19,581 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 28 treesize of output 22 [2021-06-12 19:59:19,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,596 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:19,598 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 28 treesize of output 22 [2021-06-12 19:59:19,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:19,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:19,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_699 vanished before elimination [2021-06-12 19:59:19,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:19,613 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:29 [2021-06-12 19:59:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:19,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318289002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:19,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:19,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833208337] [2021-06-12 19:59:19,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:19,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:19,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:19,668 INFO L87 Difference]: Start difference. First operand 1046 states and 3338 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:20,043 INFO L93 Difference]: Finished difference Result 1304 states and 4064 transitions. [2021-06-12 19:59:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:20,045 INFO L225 Difference]: With dead ends: 1304 [2021-06-12 19:59:20,045 INFO L226 Difference]: Without dead ends: 1273 [2021-06-12 19:59:20,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-12 19:59:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1052. [2021-06-12 19:59:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.1902949571836348) internal successors, (3353), 1051 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3353 transitions. [2021-06-12 19:59:20,055 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3353 transitions. Word has length 24 [2021-06-12 19:59:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:20,056 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3353 transitions. [2021-06-12 19:59:20,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3353 transitions. [2021-06-12 19:59:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:20,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:20,057 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:20,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-06-12 19:59:20,257 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1671732544, now seen corresponding path program 187 times [2021-06-12 19:59:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:20,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291561989] [2021-06-12 19:59:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:20,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291561989] [2021-06-12 19:59:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291561989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284004082] [2021-06-12 19:59:20,398 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 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 19:59:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:59:20,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:20,477 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 26 treesize of output 20 [2021-06-12 19:59:20,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,479 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 27 treesize of output 21 [2021-06-12 19:59:20,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:20,482 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 26 treesize of output 20 [2021-06-12 19:59:20,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:20,510 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:20,562 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 28 treesize of output 22 [2021-06-12 19:59:20,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,606 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 28 treesize of output 22 [2021-06-12 19:59:20,607 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 19:59:20,649 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 19:59:20,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,652 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 19 treesize of output 15 [2021-06-12 19:59:20,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_703 vanished before elimination [2021-06-12 19:59:20,689 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 19:59:20,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,692 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 19:59:20,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:20,724 INFO L518 ElimStorePlain]: Eliminatee v_prenex_705 vanished before elimination [2021-06-12 19:59:20,724 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:20,724 INFO L518 ElimStorePlain]: Eliminatee v_prenex_700 vanished before elimination [2021-06-12 19:59:20,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:59:20,725 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:183, output treesize:81 [2021-06-12 19:59:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:20,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284004082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:20,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:20,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318429267] [2021-06-12 19:59:20,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:20,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:20,839 INFO L87 Difference]: Start difference. First operand 1052 states and 3353 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:21,363 INFO L93 Difference]: Finished difference Result 1336 states and 4144 transitions. [2021-06-12 19:59:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:21,365 INFO L225 Difference]: With dead ends: 1336 [2021-06-12 19:59:21,365 INFO L226 Difference]: Without dead ends: 1301 [2021-06-12 19:59:21,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-12 19:59:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1050. [2021-06-12 19:59:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.19161105815062) internal successors, (3348), 1049 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3348 transitions. [2021-06-12 19:59:21,376 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3348 transitions. Word has length 24 [2021-06-12 19:59:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:21,376 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3348 transitions. [2021-06-12 19:59:21,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3348 transitions. [2021-06-12 19:59:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:21,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:21,377 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:21,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:21,577 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1134239688, now seen corresponding path program 188 times [2021-06-12 19:59:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:21,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926059693] [2021-06-12 19:59:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:21,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:21,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926059693] [2021-06-12 19:59:21,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926059693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444276467] [2021-06-12 19:59:21,773 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 19:59:21,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:21,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:21,870 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 27 treesize of output 21 [2021-06-12 19:59:21,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,872 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 27 treesize of output 21 [2021-06-12 19:59:21,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:21,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:21,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:61 [2021-06-12 19:59:21,932 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 29 treesize of output 23 [2021-06-12 19:59:21,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,934 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 30 treesize of output 24 [2021-06-12 19:59:21,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,982 INFO L628 ElimStorePlain]: treesize reduction 41, result has 58.6 percent of original size [2021-06-12 19:59:21,982 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:59:21,983 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 11 treesize of output 9 [2021-06-12 19:59:21,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,002 INFO L518 ElimStorePlain]: Eliminatee v_prenex_707 vanished before elimination [2021-06-12 19:59:22,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:22,003 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:47 [2021-06-12 19:59:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:22,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444276467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:22,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:22,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069483510] [2021-06-12 19:59:22,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:22,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:22,073 INFO L87 Difference]: Start difference. First operand 1050 states and 3348 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:22,442 INFO L93 Difference]: Finished difference Result 1300 states and 4040 transitions. [2021-06-12 19:59:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:22,444 INFO L225 Difference]: With dead ends: 1300 [2021-06-12 19:59:22,444 INFO L226 Difference]: Without dead ends: 1247 [2021-06-12 19:59:22,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-12 19:59:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1048. [2021-06-12 19:59:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 3.1929321872015284) internal successors, (3343), 1047 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3343 transitions. [2021-06-12 19:59:22,455 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3343 transitions. Word has length 24 [2021-06-12 19:59:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:22,455 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 3343 transitions. [2021-06-12 19:59:22,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3343 transitions. [2021-06-12 19:59:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:22,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:22,456 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:22,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:22,657 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2019822032, now seen corresponding path program 189 times [2021-06-12 19:59:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:22,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294919943] [2021-06-12 19:59:22,657 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 19:59:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:22,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:22,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294919943] [2021-06-12 19:59:22,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294919943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563170376] [2021-06-12 19:59:22,850 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 19:59:22,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:22,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:22,948 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 26 treesize of output 20 [2021-06-12 19:59:22,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,951 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 25 treesize of output 19 [2021-06-12 19:59:22,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:22,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:22,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:22,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-06-12 19:59:23,010 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 27 treesize of output 21 [2021-06-12 19:59:23,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,014 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:23,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-06-12 19:59:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563170376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:23,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655849375] [2021-06-12 19:59:23,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:23,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:23,045 INFO L87 Difference]: Start difference. First operand 1048 states and 3343 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:23,331 INFO L93 Difference]: Finished difference Result 1358 states and 4183 transitions. [2021-06-12 19:59:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:23,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:23,333 INFO L225 Difference]: With dead ends: 1358 [2021-06-12 19:59:23,333 INFO L226 Difference]: Without dead ends: 1327 [2021-06-12 19:59:23,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-12 19:59:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1054. [2021-06-12 19:59:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.1889838556505223) internal successors, (3358), 1053 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3358 transitions. [2021-06-12 19:59:23,344 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3358 transitions. Word has length 24 [2021-06-12 19:59:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:23,344 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3358 transitions. [2021-06-12 19:59:23,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3358 transitions. [2021-06-12 19:59:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:23,345 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:23,345 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:23,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-06-12 19:59:23,545 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash 537173448, now seen corresponding path program 190 times [2021-06-12 19:59:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:23,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900246921] [2021-06-12 19:59:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:23,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900246921] [2021-06-12 19:59:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900246921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880401706] [2021-06-12 19:59:23,714 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 19:59:23,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:23,812 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 26 treesize of output 20 [2021-06-12 19:59:23,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,814 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 25 treesize of output 19 [2021-06-12 19:59:23,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:23,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-06-12 19:59:23,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:59:23,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,872 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 12 treesize of output 8 [2021-06-12 19:59:23,873 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:23,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,887 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 19 treesize of output 15 [2021-06-12 19:59:23,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,899 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 7 [2021-06-12 19:59:23,900 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:23,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:23,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-06-12 19:59:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:23,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880401706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812259689] [2021-06-12 19:59:23,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:23,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:23,976 INFO L87 Difference]: Start difference. First operand 1054 states and 3358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:24,398 INFO L93 Difference]: Finished difference Result 1390 states and 4263 transitions. [2021-06-12 19:59:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:24,400 INFO L225 Difference]: With dead ends: 1390 [2021-06-12 19:59:24,400 INFO L226 Difference]: Without dead ends: 1355 [2021-06-12 19:59:24,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-12 19:59:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1052. [2021-06-12 19:59:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.1902949571836348) internal successors, (3353), 1051 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3353 transitions. [2021-06-12 19:59:24,417 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3353 transitions. Word has length 24 [2021-06-12 19:59:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:24,418 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3353 transitions. [2021-06-12 19:59:24,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3353 transitions. [2021-06-12 19:59:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:24,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:24,419 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:24,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-06-12 19:59:24,619 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -319408, now seen corresponding path program 191 times [2021-06-12 19:59:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:24,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850764104] [2021-06-12 19:59:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:24,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850764104] [2021-06-12 19:59:24,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850764104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159373798] [2021-06-12 19:59:24,785 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 19:59:24,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:59:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:24,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:24,859 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 28 treesize of output 22 [2021-06-12 19:59:24,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,861 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 28 treesize of output 22 [2021-06-12 19:59:24,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:24,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:24,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:67 [2021-06-12 19:59:24,910 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 31 treesize of output 25 [2021-06-12 19:59:24,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:24,912 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 30 treesize of output 24 [2021-06-12 19:59:24,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:24,942 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:59:24,943 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 31 treesize of output 25 [2021-06-12 19:59:24,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:24,946 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 30 treesize of output 24 [2021-06-12 19:59:24,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:24,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:24,971 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-06-12 19:59:24,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:24,971 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:157, output treesize:65 [2021-06-12 19:59:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:25,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159373798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:25,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:25,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518070987] [2021-06-12 19:59:25,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:25,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:25,071 INFO L87 Difference]: Start difference. First operand 1052 states and 3353 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:25,476 INFO L93 Difference]: Finished difference Result 1354 states and 4173 transitions. [2021-06-12 19:59:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:25,477 INFO L225 Difference]: With dead ends: 1354 [2021-06-12 19:59:25,477 INFO L226 Difference]: Without dead ends: 1315 [2021-06-12 19:59:25,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-12 19:59:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1050. [2021-06-12 19:59:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.19161105815062) internal successors, (3348), 1049 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3348 transitions. [2021-06-12 19:59:25,488 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3348 transitions. Word has length 24 [2021-06-12 19:59:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:25,488 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3348 transitions. [2021-06-12 19:59:25,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3348 transitions. [2021-06-12 19:59:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:25,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:25,489 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:25,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:25,690 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1500814746, now seen corresponding path program 192 times [2021-06-12 19:59:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:25,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802877639] [2021-06-12 19:59:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:25,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802877639] [2021-06-12 19:59:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802877639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383060149] [2021-06-12 19:59:25,851 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 19:59:25,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:25,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:25,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:59:25,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:59:25,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,931 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 28 treesize of output 22 [2021-06-12 19:59:25,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,934 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 28 treesize of output 22 [2021-06-12 19:59:25,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:25,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:141 [2021-06-12 19:59:26,068 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 31 treesize of output 25 [2021-06-12 19:59:26,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:26,071 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 31 treesize of output 25 [2021-06-12 19:59:26,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:26,074 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 31 treesize of output 25 [2021-06-12 19:59:26,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:26,077 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 30 treesize of output 24 [2021-06-12 19:59:26,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,087 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 30 treesize of output 24 [2021-06-12 19:59:26,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,090 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 30 treesize of output 24 [2021-06-12 19:59:26,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,094 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 31 treesize of output 25 [2021-06-12 19:59:26,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:26,096 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 30 treesize of output 24 [2021-06-12 19:59:26,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,162 INFO L628 ElimStorePlain]: treesize reduction 92, result has 45.6 percent of original size [2021-06-12 19:59:26,162 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 19:59:26,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:26,163 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:353, output treesize:77 [2021-06-12 19:59:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383060149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:26,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:59:26,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161615235] [2021-06-12 19:59:26,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:59:26,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:59:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:59:26,252 INFO L87 Difference]: Start difference. First operand 1050 states and 3348 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 19:59:26,745 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-12 19:59:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:26,956 INFO L93 Difference]: Finished difference Result 1533 states and 4573 transitions. [2021-06-12 19:59:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:26,956 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 24 [2021-06-12 19:59:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:26,958 INFO L225 Difference]: With dead ends: 1533 [2021-06-12 19:59:26,958 INFO L226 Difference]: Without dead ends: 1410 [2021-06-12 19:59:26,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-12 19:59:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1054. [2021-06-12 19:59:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.1889838556505223) internal successors, (3358), 1053 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3358 transitions. [2021-06-12 19:59:26,969 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3358 transitions. Word has length 24 [2021-06-12 19:59:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:26,969 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3358 transitions. [2021-06-12 19:59:26,969 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 19:59:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3358 transitions. [2021-06-12 19:59:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:26,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:26,970 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:27,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:27,170 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1968098314, now seen corresponding path program 193 times [2021-06-12 19:59:27,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:27,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168653367] [2021-06-12 19:59:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:27,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168653367] [2021-06-12 19:59:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168653367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758865084] [2021-06-12 19:59:27,316 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 19:59:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:27,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:27,424 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 26 treesize of output 20 [2021-06-12 19:59:27,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,426 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 25 treesize of output 19 [2021-06-12 19:59:27,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:27,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:27,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-06-12 19:59:27,487 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 27 treesize of output 21 [2021-06-12 19:59:27,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:27,491 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:27,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-06-12 19:59:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:27,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758865084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:27,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:27,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986224374] [2021-06-12 19:59:27,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:27,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:27,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:27,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:27,524 INFO L87 Difference]: Start difference. First operand 1054 states and 3358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:27,811 INFO L93 Difference]: Finished difference Result 1328 states and 4130 transitions. [2021-06-12 19:59:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:27,813 INFO L225 Difference]: With dead ends: 1328 [2021-06-12 19:59:27,813 INFO L226 Difference]: Without dead ends: 1297 [2021-06-12 19:59:27,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-12 19:59:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1058. [2021-06-12 19:59:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.186376537369915) internal successors, (3368), 1057 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3368 transitions. [2021-06-12 19:59:27,824 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3368 transitions. Word has length 24 [2021-06-12 19:59:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:27,824 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 3368 transitions. [2021-06-12 19:59:27,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3368 transitions. [2021-06-12 19:59:27,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:27,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:27,825 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:28,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1510,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:28,025 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 230126498, now seen corresponding path program 194 times [2021-06-12 19:59:28,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:28,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420421992] [2021-06-12 19:59:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:28,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:28,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420421992] [2021-06-12 19:59:28,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420421992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572222653] [2021-06-12 19:59:28,169 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 19:59:28,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:28,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:28,277 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 26 treesize of output 20 [2021-06-12 19:59:28,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,279 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 25 treesize of output 19 [2021-06-12 19:59:28,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:28,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-06-12 19:59:28,323 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 19:59:28,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,337 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 7 [2021-06-12 19:59:28,338 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:28,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,352 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 20 treesize of output 16 [2021-06-12 19:59:28,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,365 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 12 treesize of output 8 [2021-06-12 19:59:28,366 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:28,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:28,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-06-12 19:59:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:28,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572222653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:28,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753147738] [2021-06-12 19:59:28,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:28,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:28,438 INFO L87 Difference]: Start difference. First operand 1058 states and 3368 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:28,841 INFO L93 Difference]: Finished difference Result 1360 states and 4210 transitions. [2021-06-12 19:59:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:28,843 INFO L225 Difference]: With dead ends: 1360 [2021-06-12 19:59:28,843 INFO L226 Difference]: Without dead ends: 1325 [2021-06-12 19:59:28,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:59:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-06-12 19:59:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1056. [2021-06-12 19:59:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.1876777251184834) internal successors, (3363), 1055 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3363 transitions. [2021-06-12 19:59:28,854 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3363 transitions. Word has length 24 [2021-06-12 19:59:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:28,854 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 3363 transitions. [2021-06-12 19:59:28,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3363 transitions. [2021-06-12 19:59:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:28,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:28,855 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:29,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-06-12 19:59:29,055 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:29,056 INFO L82 PathProgramCache]: Analyzing trace with hash -307366358, now seen corresponding path program 195 times [2021-06-12 19:59:29,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:29,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280107164] [2021-06-12 19:59:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:29,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:29,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280107164] [2021-06-12 19:59:29,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280107164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142441811] [2021-06-12 19:59:29,222 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 19:59:29,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:29,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:29,308 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 19:59:29,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,310 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 19 treesize of output 15 [2021-06-12 19:59:29,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:29,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 19:59:29,358 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 20 treesize of output 16 [2021-06-12 19:59:29,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,361 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 19 treesize of output 15 [2021-06-12 19:59:29,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:29,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,394 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 20 treesize of output 16 [2021-06-12 19:59:29,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,420 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 13 treesize of output 9 [2021-06-12 19:59:29,421 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:29,423 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 12 treesize of output 8 [2021-06-12 19:59:29,424 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:29,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,448 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 11 treesize of output 7 [2021-06-12 19:59:29,449 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:29,451 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 13 treesize of output 9 [2021-06-12 19:59:29,452 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:29,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:29,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:29,476 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:117, output treesize:57 [2021-06-12 19:59:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:29,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142441811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:29,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:29,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996014535] [2021-06-12 19:59:29,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:29,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:29,563 INFO L87 Difference]: Start difference. First operand 1056 states and 3363 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:30,483 INFO L93 Difference]: Finished difference Result 1517 states and 4655 transitions. [2021-06-12 19:59:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:59:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:30,485 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 19:59:30,485 INFO L226 Difference]: Without dead ends: 1429 [2021-06-12 19:59:30,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 902.0ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:59:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-06-12 19:59:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1061. [2021-06-12 19:59:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 3.190566037735849) internal successors, (3382), 1060 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 3382 transitions. [2021-06-12 19:59:30,496 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 3382 transitions. Word has length 24 [2021-06-12 19:59:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:30,496 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 3382 transitions. [2021-06-12 19:59:30,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 3382 transitions. [2021-06-12 19:59:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:30,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:30,497 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:30,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:30,698 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1277024848, now seen corresponding path program 196 times [2021-06-12 19:59:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744784310] [2021-06-12 19:59:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:30,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:30,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744784310] [2021-06-12 19:59:30,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744784310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:30,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483499440] [2021-06-12 19:59:30,936 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 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 19:59:30,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:31,012 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 19:59:31,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,015 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 19:59:31,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:59:31,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,020 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 18 treesize of output 14 [2021-06-12 19:59:31,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:31,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:31,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 19:59:31,135 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 27 treesize of output 21 [2021-06-12 19:59:31,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,137 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 20 treesize of output 16 [2021-06-12 19:59:31,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:31,150 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 12 treesize of output 8 [2021-06-12 19:59:31,151 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:31,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:31,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:31,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-06-12 19:59:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:31,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483499440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:31,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:31,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099092042] [2021-06-12 19:59:31,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:31,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:31,230 INFO L87 Difference]: Start difference. First operand 1061 states and 3382 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:32,063 INFO L93 Difference]: Finished difference Result 1604 states and 4873 transitions. [2021-06-12 19:59:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:32,065 INFO L225 Difference]: With dead ends: 1604 [2021-06-12 19:59:32,065 INFO L226 Difference]: Without dead ends: 1569 [2021-06-12 19:59:32,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 989.6ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-06-12 19:59:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1059. [2021-06-12 19:59:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1937618147448017) internal successors, (3379), 1058 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3379 transitions. [2021-06-12 19:59:32,078 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3379 transitions. Word has length 24 [2021-06-12 19:59:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:32,078 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3379 transitions. [2021-06-12 19:59:32,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3379 transitions. [2021-06-12 19:59:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:32,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:32,079 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:32,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-12 19:59:32,279 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1666513810, now seen corresponding path program 197 times [2021-06-12 19:59:32,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:32,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939411949] [2021-06-12 19:59:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939411949] [2021-06-12 19:59:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939411949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492303175] [2021-06-12 19:59:32,423 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 19:59:32,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:32,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:32,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,550 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 17 treesize of output 13 [2021-06-12 19:59:32,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:59:32,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,599 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 18 treesize of output 14 [2021-06-12 19:59:32,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:32,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:32,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:32,832 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_720], 1=[o_4, v_prenex_721]} [2021-06-12 19:59:32,834 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 20 treesize of output 16 [2021-06-12 19:59:32,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,854 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 19:59:32,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,873 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 12 treesize of output 8 [2021-06-12 19:59:32,874 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:32,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:59:32,893 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:32,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,908 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 19:59:32,909 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-12 19:59:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:32,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492303175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:32,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:32,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153792565] [2021-06-12 19:59:32,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:32,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:32,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:32,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:32,985 INFO L87 Difference]: Start difference. First operand 1059 states and 3379 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:34,596 INFO L93 Difference]: Finished difference Result 1731 states and 5221 transitions. [2021-06-12 19:59:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:59:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:34,598 INFO L225 Difference]: With dead ends: 1731 [2021-06-12 19:59:34,598 INFO L226 Difference]: Without dead ends: 1599 [2021-06-12 19:59:34,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1564.0ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:59:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-12 19:59:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1059. [2021-06-12 19:59:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1918714555765595) internal successors, (3377), 1058 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3377 transitions. [2021-06-12 19:59:34,610 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3377 transitions. Word has length 24 [2021-06-12 19:59:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:34,610 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3377 transitions. [2021-06-12 19:59:34,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3377 transitions. [2021-06-12 19:59:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:34,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:34,611 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:34,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1528,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,812 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1271483800, now seen corresponding path program 198 times [2021-06-12 19:59:34,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:34,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821062804] [2021-06-12 19:59:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:34,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:34,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821062804] [2021-06-12 19:59:34,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821062804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365614658] [2021-06-12 19:59:34,975 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 19:59:35,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:35,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,170 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 17 treesize of output 13 [2021-06-12 19:59:35,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,173 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 18 treesize of output 14 [2021-06-12 19:59:35,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:35,194 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 19:59:35,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-12 19:59:35,287 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:59:35,289 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 19:59:35,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,292 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 19 treesize of output 15 [2021-06-12 19:59:35,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,316 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-06-12 19:59:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:59:35,320 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:35,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:35,326 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 19:59:35,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-12 19:59:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:35,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365614658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:35,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:35,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849200587] [2021-06-12 19:59:35,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:35,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:35,358 INFO L87 Difference]: Start difference. First operand 1059 states and 3377 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:35,695 INFO L93 Difference]: Finished difference Result 1323 states and 4108 transitions. [2021-06-12 19:59:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:35,697 INFO L225 Difference]: With dead ends: 1323 [2021-06-12 19:59:35,697 INFO L226 Difference]: Without dead ends: 1264 [2021-06-12 19:59:35,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-12 19:59:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1059. [2021-06-12 19:59:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1918714555765595) internal successors, (3377), 1058 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3377 transitions. [2021-06-12 19:59:35,707 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3377 transitions. Word has length 24 [2021-06-12 19:59:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:35,707 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3377 transitions. [2021-06-12 19:59:35,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3377 transitions. [2021-06-12 19:59:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:35,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:35,708 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:35,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1541,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:35,909 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1285511680, now seen corresponding path program 199 times [2021-06-12 19:59:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:35,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572436791] [2021-06-12 19:59:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:36,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:36,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572436791] [2021-06-12 19:59:36,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572436791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118172142] [2021-06-12 19:59:36,080 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 19:59:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:36,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,271 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 17 treesize of output 13 [2021-06-12 19:59:36,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:59:36,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:36,292 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 19:59:36,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-12 19:59:36,341 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_726], 1=[v_prenex_727, o_4]} [2021-06-12 19:59:36,343 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 19:59:36,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:36,363 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 20 treesize of output 16 [2021-06-12 19:59:36,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:36,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,382 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 8 [2021-06-12 19:59:36,383 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:36,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,401 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 11 treesize of output 7 [2021-06-12 19:59:36,402 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:36,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:36,418 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 19:59:36,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-12 19:59:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:36,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118172142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:36,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:36,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328276870] [2021-06-12 19:59:36,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:36,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:36,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:36,482 INFO L87 Difference]: Start difference. First operand 1059 states and 3377 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:36,841 INFO L93 Difference]: Finished difference Result 1315 states and 4100 transitions. [2021-06-12 19:59:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:36,842 INFO L225 Difference]: With dead ends: 1315 [2021-06-12 19:59:36,842 INFO L226 Difference]: Without dead ends: 1280 [2021-06-12 19:59:36,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-12 19:59:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1059. [2021-06-12 19:59:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1918714555765595) internal successors, (3377), 1058 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3377 transitions. [2021-06-12 19:59:36,853 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3377 transitions. Word has length 24 [2021-06-12 19:59:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:36,854 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3377 transitions. [2021-06-12 19:59:36,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3377 transitions. [2021-06-12 19:59:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:36,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:36,855 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:37,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1547 [2021-06-12 19:59:37,069 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2134781194, now seen corresponding path program 200 times [2021-06-12 19:59:37,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:37,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946548536] [2021-06-12 19:59:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:37,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946548536] [2021-06-12 19:59:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946548536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321516431] [2021-06-12 19:59:37,230 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 19:59:37,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:37,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:37,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,391 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 17 treesize of output 13 [2021-06-12 19:59:37,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,394 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 18 treesize of output 14 [2021-06-12 19:59:37,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:37,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,447 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 17 treesize of output 13 [2021-06-12 19:59:37,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,450 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 18 treesize of output 14 [2021-06-12 19:59:37,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:37,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:37,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:59:37,667 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:59:37,668 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 19:59:37,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:37,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,676 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 7 [2021-06-12 19:59:37,677 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:37,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:37,683 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 19:59:37,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-12 19:59:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:37,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321516431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:37,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:37,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804157693] [2021-06-12 19:59:37,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:37,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:37,719 INFO L87 Difference]: Start difference. First operand 1059 states and 3377 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:38,385 INFO L93 Difference]: Finished difference Result 1414 states and 4356 transitions. [2021-06-12 19:59:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:38,387 INFO L225 Difference]: With dead ends: 1414 [2021-06-12 19:59:38,387 INFO L226 Difference]: Without dead ends: 1356 [2021-06-12 19:59:38,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-12 19:59:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1074. [2021-06-12 19:59:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.191985088536813) internal successors, (3425), 1073 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3425 transitions. [2021-06-12 19:59:38,399 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3425 transitions. Word has length 24 [2021-06-12 19:59:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:38,399 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3425 transitions. [2021-06-12 19:59:38,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3425 transitions. [2021-06-12 19:59:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:38,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:38,400 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:38,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-06-12 19:59:38,600 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:38,601 INFO L82 PathProgramCache]: Analyzing trace with hash 396809378, now seen corresponding path program 201 times [2021-06-12 19:59:38,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:38,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462854429] [2021-06-12 19:59:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:38,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:38,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462854429] [2021-06-12 19:59:38,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462854429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538984698] [2021-06-12 19:59:38,775 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 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 19:59:38,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:38,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:38,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,885 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 19:59:38,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,888 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 18 treesize of output 14 [2021-06-12 19:59:38,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,908 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 19:59:38,908 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 19:59:39,004 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_733], 1=[v_prenex_734, o_4]} [2021-06-12 19:59:39,007 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 19 treesize of output 15 [2021-06-12 19:59:39,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,009 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 19 treesize of output 15 [2021-06-12 19:59:39,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:39,054 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 20 treesize of output 16 [2021-06-12 19:59:39,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,057 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 20 treesize of output 16 [2021-06-12 19:59:39,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:39,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:39,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:39,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:39,098 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 12 treesize of output 8 [2021-06-12 19:59:39,099 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:39,101 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 12 treesize of output 8 [2021-06-12 19:59:39,102 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:39,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:39,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:39,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:39,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:59:39,142 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:39,144 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 11 treesize of output 7 [2021-06-12 19:59:39,145 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:39,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:39,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:39,180 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-12 19:59:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:39,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538984698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:39,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:39,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:39,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945722166] [2021-06-12 19:59:39,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:39,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:39,275 INFO L87 Difference]: Start difference. First operand 1074 states and 3425 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:40,348 INFO L93 Difference]: Finished difference Result 1727 states and 5166 transitions. [2021-06-12 19:59:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:40,350 INFO L225 Difference]: With dead ends: 1727 [2021-06-12 19:59:40,350 INFO L226 Difference]: Without dead ends: 1620 [2021-06-12 19:59:40,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1008.9ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:59:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-12 19:59:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1080. [2021-06-12 19:59:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.19740500463392) internal successors, (3450), 1079 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3450 transitions. [2021-06-12 19:59:40,363 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3450 transitions. Word has length 24 [2021-06-12 19:59:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:40,363 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 3450 transitions. [2021-06-12 19:59:40,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3450 transitions. [2021-06-12 19:59:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:40,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:40,364 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-06-12 19:59:40,564 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,564 INFO L82 PathProgramCache]: Analyzing trace with hash -96944408, now seen corresponding path program 202 times [2021-06-12 19:59:40,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278695709] [2021-06-12 19:59:40,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:40,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278695709] [2021-06-12 19:59:40,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278695709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839745851] [2021-06-12 19:59:40,715 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 19:59:40,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,874 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 18 treesize of output 14 [2021-06-12 19:59:40,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:40,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,929 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 18 treesize of output 14 [2021-06-12 19:59:40,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:40,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:40,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:59:41,117 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:59:41,119 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 19 treesize of output 15 [2021-06-12 19:59:41,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:41,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:59:41,128 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:41,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:41,133 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 19:59:41,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-12 19:59:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:41,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839745851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:41,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:41,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529865702] [2021-06-12 19:59:41,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:41,159 INFO L87 Difference]: Start difference. First operand 1080 states and 3450 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:59:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:41,605 INFO L93 Difference]: Finished difference Result 1371 states and 4252 transitions. [2021-06-12 19:59:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 24 [2021-06-12 19:59:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:41,607 INFO L225 Difference]: With dead ends: 1371 [2021-06-12 19:59:41,607 INFO L226 Difference]: Without dead ends: 1340 [2021-06-12 19:59:41,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 516.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-12 19:59:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1067. [2021-06-12 19:59:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.1979362101313322) internal successors, (3409), 1066 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3409 transitions. [2021-06-12 19:59:41,618 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3409 transitions. Word has length 24 [2021-06-12 19:59:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:41,618 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 3409 transitions. [2021-06-12 19:59:41,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:59:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3409 transitions. [2021-06-12 19:59:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:41,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:41,619 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:41,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-06-12 19:59:41,820 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1417531126, now seen corresponding path program 203 times [2021-06-12 19:59:41,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:41,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034911132] [2021-06-12 19:59:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:42,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:42,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034911132] [2021-06-12 19:59:42,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034911132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400308860] [2021-06-12 19:59:42,004 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 19:59:42,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:59:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:42,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,166 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 17 treesize of output 13 [2021-06-12 19:59:42,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:59:42,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,220 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 17 treesize of output 13 [2021-06-12 19:59:42,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,224 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 18 treesize of output 14 [2021-06-12 19:59:42,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:42,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:59:42,432 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_743], 1=[o_4, v_prenex_744]} [2021-06-12 19:59:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:42,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,457 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 19 treesize of output 15 [2021-06-12 19:59:42,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,480 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 11 treesize of output 7 [2021-06-12 19:59:42,481 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:42,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,501 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 11 treesize of output 7 [2021-06-12 19:59:42,502 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:42,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,520 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 19:59:42,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 19:59:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400308860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:42,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:42,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269177238] [2021-06-12 19:59:42,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:42,589 INFO L87 Difference]: Start difference. First operand 1067 states and 3409 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:43,149 INFO L93 Difference]: Finished difference Result 1469 states and 4522 transitions. [2021-06-12 19:59:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:43,151 INFO L225 Difference]: With dead ends: 1469 [2021-06-12 19:59:43,151 INFO L226 Difference]: Without dead ends: 1392 [2021-06-12 19:59:43,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-06-12 19:59:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1064. [2021-06-12 19:59:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.196613358419567) internal successors, (3398), 1063 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3398 transitions. [2021-06-12 19:59:43,167 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3398 transitions. Word has length 24 [2021-06-12 19:59:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:43,167 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3398 transitions. [2021-06-12 19:59:43,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3398 transitions. [2021-06-12 19:59:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:43,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:43,168 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:43,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:43,368 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash 632347538, now seen corresponding path program 204 times [2021-06-12 19:59:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:43,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126376259] [2021-06-12 19:59:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:43,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:43,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126376259] [2021-06-12 19:59:43,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126376259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465944082] [2021-06-12 19:59:43,532 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 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 19:59:43,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,635 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 27 treesize of output 21 [2021-06-12 19:59:43,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,638 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 26 treesize of output 20 [2021-06-12 19:59:43,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,641 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 27 treesize of output 21 [2021-06-12 19:59:43,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,643 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 26 treesize of output 20 [2021-06-12 19:59:43,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:43,671 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-12 19:59:43,755 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 28 treesize of output 22 [2021-06-12 19:59:43,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,757 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 28 treesize of output 22 [2021-06-12 19:59:43,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,796 INFO L628 ElimStorePlain]: treesize reduction 67, result has 43.7 percent of original size [2021-06-12 19:59:43,797 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 28 treesize of output 22 [2021-06-12 19:59:43,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,811 INFO L518 ElimStorePlain]: Eliminatee v_prenex_746 vanished before elimination [2021-06-12 19:59:43,811 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:43,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:161, output treesize:31 [2021-06-12 19:59:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:43,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465944082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:43,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320554660] [2021-06-12 19:59:43,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:43,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:43,857 INFO L87 Difference]: Start difference. First operand 1064 states and 3398 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 19:59:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,198 INFO L93 Difference]: Finished difference Result 1447 states and 4436 transitions. [2021-06-12 19:59:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:44,199 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 24 [2021-06-12 19:59:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,200 INFO L225 Difference]: With dead ends: 1447 [2021-06-12 19:59:44,200 INFO L226 Difference]: Without dead ends: 1388 [2021-06-12 19:59:44,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-12 19:59:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1067. [2021-06-12 19:59:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.196060037523452) internal successors, (3407), 1066 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3407 transitions. [2021-06-12 19:59:44,211 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3407 transitions. Word has length 24 [2021-06-12 19:59:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,211 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 3407 transitions. [2021-06-12 19:59:44,211 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 19:59:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3407 transitions. [2021-06-12 19:59:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:44,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,212 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:44,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1592,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,413 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1105624278, now seen corresponding path program 205 times [2021-06-12 19:59:44,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:44,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373253849] [2021-06-12 19:59:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:44,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373253849] [2021-06-12 19:59:44,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373253849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676149512] [2021-06-12 19:59:44,585 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 19:59:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:44,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:44,694 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 26 treesize of output 20 [2021-06-12 19:59:44,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,696 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 25 treesize of output 19 [2021-06-12 19:59:44,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:44,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-06-12 19:59:44,739 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 20 treesize of output 16 [2021-06-12 19:59:44,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,754 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 27 treesize of output 21 [2021-06-12 19:59:44,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,764 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-12 19:59:44,766 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 12 treesize of output 8 [2021-06-12 19:59:44,767 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:44,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:44,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:44,777 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:27 [2021-06-12 19:59:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:44,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676149512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:44,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:44,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731520865] [2021-06-12 19:59:44,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:44,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:44,839 INFO L87 Difference]: Start difference. First operand 1067 states and 3407 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:45,135 INFO L93 Difference]: Finished difference Result 1439 states and 4428 transitions. [2021-06-12 19:59:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:45,137 INFO L225 Difference]: With dead ends: 1439 [2021-06-12 19:59:45,137 INFO L226 Difference]: Without dead ends: 1404 [2021-06-12 19:59:45,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-12 19:59:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1065. [2021-06-12 19:59:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.1973684210526314) internal successors, (3402), 1064 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3402 transitions. [2021-06-12 19:59:45,148 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3402 transitions. Word has length 24 [2021-06-12 19:59:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:45,148 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 3402 transitions. [2021-06-12 19:59:45,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3402 transitions. [2021-06-12 19:59:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:45,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:45,149 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:45,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-06-12 19:59:45,350 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:45,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1643117134, now seen corresponding path program 206 times [2021-06-12 19:59:45,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:45,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140519797] [2021-06-12 19:59:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:45,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140519797] [2021-06-12 19:59:45,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140519797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678275586] [2021-06-12 19:59:45,550 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 19:59:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:45,658 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 27 treesize of output 21 [2021-06-12 19:59:45,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,660 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 27 treesize of output 21 [2021-06-12 19:59:45,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:45,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:61 [2021-06-12 19:59:45,720 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 19:59:45,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,722 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 20 treesize of output 16 [2021-06-12 19:59:45,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,771 INFO L628 ElimStorePlain]: treesize reduction 51, result has 61.4 percent of original size [2021-06-12 19:59:45,773 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 13 treesize of output 9 [2021-06-12 19:59:45,774 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:45,776 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 7 [2021-06-12 19:59:45,777 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:45,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,800 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 22 treesize of output 18 [2021-06-12 19:59:45,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,821 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 15 treesize of output 11 [2021-06-12 19:59:45,822 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:45,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:45,842 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:145, output treesize:47 [2021-06-12 19:59:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:45,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678275586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:45,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:45,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567476461] [2021-06-12 19:59:45,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:45,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:45,922 INFO L87 Difference]: Start difference. First operand 1065 states and 3402 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:46,313 INFO L93 Difference]: Finished difference Result 1443 states and 4426 transitions. [2021-06-12 19:59:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:46,315 INFO L225 Difference]: With dead ends: 1443 [2021-06-12 19:59:46,315 INFO L226 Difference]: Without dead ends: 1390 [2021-06-12 19:59:46,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-12 19:59:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1067. [2021-06-12 19:59:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.196060037523452) internal successors, (3407), 1066 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3407 transitions. [2021-06-12 19:59:46,326 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3407 transitions. Word has length 24 [2021-06-12 19:59:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:46,326 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 3407 transitions. [2021-06-12 19:59:46,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3407 transitions. [2021-06-12 19:59:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:46,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:46,327 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:46,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1601 [2021-06-12 19:59:46,527 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1151354824, now seen corresponding path program 207 times [2021-06-12 19:59:46,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:46,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075843453] [2021-06-12 19:59:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:46,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:46,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075843453] [2021-06-12 19:59:46,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075843453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146682350] [2021-06-12 19:59:46,754 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 19:59:46,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:46,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:46,836 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 19:59:46,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:46,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:46,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:46,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 19:59:46,909 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 20 treesize of output 16 [2021-06-12 19:59:46,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,911 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 19:59:46,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,914 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 20 treesize of output 16 [2021-06-12 19:59:46,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,916 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 19 treesize of output 15 [2021-06-12 19:59:46,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:46,943 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 12 treesize of output 8 [2021-06-12 19:59:46,944 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:46,946 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 13 treesize of output 9 [2021-06-12 19:59:46,947 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:46,949 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 11 treesize of output 7 [2021-06-12 19:59:46,950 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:46,952 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 13 treesize of output 9 [2021-06-12 19:59:46,953 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:46,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:46,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:46,977 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:117, output treesize:57 [2021-06-12 19:59:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:47,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146682350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:47,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:47,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686974708] [2021-06-12 19:59:47,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:47,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:47,069 INFO L87 Difference]: Start difference. First operand 1067 states and 3407 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,861 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-12 19:59:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:48,123 INFO L93 Difference]: Finished difference Result 1795 states and 5428 transitions. [2021-06-12 19:59:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:48,125 INFO L225 Difference]: With dead ends: 1795 [2021-06-12 19:59:48,125 INFO L226 Difference]: Without dead ends: 1707 [2021-06-12 19:59:48,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1077.4ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:59:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-12 19:59:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1069. [2021-06-12 19:59:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.199438202247191) internal successors, (3417), 1068 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3417 transitions. [2021-06-12 19:59:48,138 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3417 transitions. Word has length 24 [2021-06-12 19:59:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:48,138 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3417 transitions. [2021-06-12 19:59:48,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3417 transitions. [2021-06-12 19:59:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:48,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:48,139 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:48,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,340 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash -661081872, now seen corresponding path program 208 times [2021-06-12 19:59:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448203306] [2021-06-12 19:59:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:48,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:48,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448203306] [2021-06-12 19:59:48,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448203306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443886449] [2021-06-12 19:59:48,506 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 19:59:48,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:48,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,696 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 17 treesize of output 13 [2021-06-12 19:59:48,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,699 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 18 treesize of output 14 [2021-06-12 19:59:48,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:48,718 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 19:59:48,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-12 19:59:48,799 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:59:48,800 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 19 treesize of output 15 [2021-06-12 19:59:48,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:48,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,808 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 11 treesize of output 7 [2021-06-12 19:59:48,809 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:48,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:48,815 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 19:59:48,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-12 19:59:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:48,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443886449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:48,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:48,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462635684] [2021-06-12 19:59:48,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:48,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:48,833 INFO L87 Difference]: Start difference. First operand 1069 states and 3417 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 19:59:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:49,157 INFO L93 Difference]: Finished difference Result 1400 states and 4353 transitions. [2021-06-12 19:59:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:49,158 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 24 [2021-06-12 19:59:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:49,159 INFO L225 Difference]: With dead ends: 1400 [2021-06-12 19:59:49,159 INFO L226 Difference]: Without dead ends: 1369 [2021-06-12 19:59:49,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-12 19:59:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1074. [2021-06-12 19:59:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.1975768872320596) internal successors, (3431), 1073 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3431 transitions. [2021-06-12 19:59:49,171 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3431 transitions. Word has length 24 [2021-06-12 19:59:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:49,171 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3431 transitions. [2021-06-12 19:59:49,171 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 19:59:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3431 transitions. [2021-06-12 19:59:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:49,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:49,172 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:49,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1610 [2021-06-12 19:59:49,373 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1895913608, now seen corresponding path program 209 times [2021-06-12 19:59:49,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:49,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356922421] [2021-06-12 19:59:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:49,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356922421] [2021-06-12 19:59:49,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356922421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920642969] [2021-06-12 19:59:49,547 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 19:59:49,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:49,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:49,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:49,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:49,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,734 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 26 treesize of output 20 [2021-06-12 19:59:49,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,737 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 25 treesize of output 19 [2021-06-12 19:59:49,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,760 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 19:59:49,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:55 [2021-06-12 19:59:49,809 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_755], 1=[v_prenex_756, o_4]} [2021-06-12 19:59:49,811 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 27 treesize of output 21 [2021-06-12 19:59:49,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,831 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 19:59:49,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,850 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 12 treesize of output 8 [2021-06-12 19:59:49,851 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:49,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,869 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 11 treesize of output 7 [2021-06-12 19:59:49,870 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:49,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,886 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 19:59:49,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-06-12 19:59:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:49,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920642969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:49,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:49,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558860818] [2021-06-12 19:59:49,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:49,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:49,952 INFO L87 Difference]: Start difference. First operand 1074 states and 3431 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:50,483 INFO L93 Difference]: Finished difference Result 1432 states and 4433 transitions. [2021-06-12 19:59:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:50,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:50,485 INFO L225 Difference]: With dead ends: 1432 [2021-06-12 19:59:50,485 INFO L226 Difference]: Without dead ends: 1397 [2021-06-12 19:59:50,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 617.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-12 19:59:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1072. [2021-06-12 19:59:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.1988795518207285) internal successors, (3426), 1071 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3426 transitions. [2021-06-12 19:59:50,497 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3426 transitions. Word has length 24 [2021-06-12 19:59:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:50,497 INFO L482 AbstractCegarLoop]: Abstraction has 1072 states and 3426 transitions. [2021-06-12 19:59:50,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3426 transitions. [2021-06-12 19:59:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:50,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:50,498 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1616,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,698 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1358420752, now seen corresponding path program 210 times [2021-06-12 19:59:50,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085540509] [2021-06-12 19:59:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:50,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085540509] [2021-06-12 19:59:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085540509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893803001] [2021-06-12 19:59:50,874 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 19:59:50,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:50,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:50,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,997 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 19:59:50,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,000 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 19 treesize of output 15 [2021-06-12 19:59:51,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,021 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 19:59:51,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 19:59:51,080 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_758], 1=[v_prenex_759, o_2]} [2021-06-12 19:59:51,083 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 20 treesize of output 16 [2021-06-12 19:59:51,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,085 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 19:59:51,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,129 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 20 treesize of output 16 [2021-06-12 19:59:51,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,132 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 19 treesize of output 15 [2021-06-12 19:59:51,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,172 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 13 treesize of output 9 [2021-06-12 19:59:51,173 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,175 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 11 treesize of output 7 [2021-06-12 19:59:51,176 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:51,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 19:59:51,222 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:51,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,225 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 11 treesize of output 7 [2021-06-12 19:59:51,226 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:51,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:51,261 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-12 19:59:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:51,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893803001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:51,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:51,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137123077] [2021-06-12 19:59:51,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:51,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:51,358 INFO L87 Difference]: Start difference. First operand 1072 states and 3426 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,858 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-12 19:59:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,214 INFO L93 Difference]: Finished difference Result 1506 states and 4654 transitions. [2021-06-12 19:59:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:52,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,215 INFO L225 Difference]: With dead ends: 1506 [2021-06-12 19:59:52,215 INFO L226 Difference]: Without dead ends: 1422 [2021-06-12 19:59:52,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-12 19:59:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1070. [2021-06-12 19:59:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2001870907390084) internal successors, (3421), 1069 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3421 transitions. [2021-06-12 19:59:52,227 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3421 transitions. Word has length 24 [2021-06-12 19:59:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,227 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3421 transitions. [2021-06-12 19:59:52,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3421 transitions. [2021-06-12 19:59:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:52,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,228 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:52,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1624,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:52,429 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1549784174, now seen corresponding path program 211 times [2021-06-12 19:59:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:52,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619036178] [2021-06-12 19:59:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:52,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:52,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619036178] [2021-06-12 19:59:52,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619036178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398769245] [2021-06-12 19:59:52,584 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 19:59:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:52,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,746 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 19:59:52,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19:59:52,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,800 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 18 treesize of output 14 [2021-06-12 19:59:52,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,803 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 19:59:52,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:52,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 19:59:52,850 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 19:59:53,027 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:59:53,028 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 27 treesize of output 21 [2021-06-12 19:59:53,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,036 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 22 treesize of output 14 [2021-06-12 19:59:53,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,042 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 19:59:53,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-06-12 19:59:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:53,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398769245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:53,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:53,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388170045] [2021-06-12 19:59:53,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:53,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:53,077 INFO L87 Difference]: Start difference. First operand 1070 states and 3421 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:53,770 INFO L93 Difference]: Finished difference Result 1489 states and 4582 transitions. [2021-06-12 19:59:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:53,772 INFO L225 Difference]: With dead ends: 1489 [2021-06-12 19:59:53,772 INFO L226 Difference]: Without dead ends: 1431 [2021-06-12 19:59:53,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-12 19:59:53,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1085. [2021-06-12 19:59:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 3.2001845018450186) internal successors, (3469), 1084 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 3469 transitions. [2021-06-12 19:59:53,783 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 3469 transitions. Word has length 24 [2021-06-12 19:59:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:53,783 INFO L482 AbstractCegarLoop]: Abstraction has 1085 states and 3469 transitions. [2021-06-12 19:59:53,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 3469 transitions. [2021-06-12 19:59:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:53,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:53,785 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:53,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1635,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,985 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1007211306, now seen corresponding path program 212 times [2021-06-12 19:59:53,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:53,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607749402] [2021-06-12 19:59:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:54,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:54,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607749402] [2021-06-12 19:59:54,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607749402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498386159] [2021-06-12 19:59:54,167 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 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 19:59:54,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:54,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:54,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,267 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 18 treesize of output 14 [2021-06-12 19:59:54,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,269 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 17 treesize of output 13 [2021-06-12 19:59:54,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,288 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 19:59:54,288 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 19:59:54,397 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_765], 1=[o_4, v_prenex_766]} [2021-06-12 19:59:54,400 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 20 treesize of output 16 [2021-06-12 19:59:54,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,402 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 20 treesize of output 16 [2021-06-12 19:59:54,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,448 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 19:59:54,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,451 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 19:59:54,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,492 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 12 treesize of output 8 [2021-06-12 19:59:54,493 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:54,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,496 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 12 treesize of output 8 [2021-06-12 19:59:54,497 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:54,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,536 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 7 [2021-06-12 19:59:54,537 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:54,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,539 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 11 treesize of output 7 [2021-06-12 19:59:54,540 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:54,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:54,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:54,576 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-12 19:59:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:54,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498386159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:54,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:54,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238029473] [2021-06-12 19:59:54,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:54,679 INFO L87 Difference]: Start difference. First operand 1085 states and 3469 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,748 INFO L93 Difference]: Finished difference Result 1686 states and 5083 transitions. [2021-06-12 19:59:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:59:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,750 INFO L225 Difference]: With dead ends: 1686 [2021-06-12 19:59:55,751 INFO L226 Difference]: Without dead ends: 1579 [2021-06-12 19:59:55,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1015.0ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:59:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-12 19:59:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1091. [2021-06-12 19:59:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.2055045871559633) internal successors, (3494), 1090 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3494 transitions. [2021-06-12 19:59:55,763 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3494 transitions. Word has length 24 [2021-06-12 19:59:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,763 INFO L482 AbstractCegarLoop]: Abstraction has 1091 states and 3494 transitions. [2021-06-12 19:59:55,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3494 transitions. [2021-06-12 19:59:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:55,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,764 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:55,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1644,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:55,964 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 513457520, now seen corresponding path program 213 times [2021-06-12 19:59:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:55,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979629505] [2021-06-12 19:59:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:56,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:56,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979629505] [2021-06-12 19:59:56,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979629505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786364152] [2021-06-12 19:59:56,109 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 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 19:59:56,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:56,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,207 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 18 treesize of output 14 [2021-06-12 19:59:56,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,211 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 19:59:56,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,234 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 19:59:56,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 19:59:56,321 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 19:59:56,323 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 19:59:56,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,325 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 19:59:56,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:59:56,347 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,349 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 7 [2021-06-12 19:59:56,350 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:56,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:56,366 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 19:59:56,366 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 19:59:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:56,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786364152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:56,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:56,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675360188] [2021-06-12 19:59:56,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:56,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:56,418 INFO L87 Difference]: Start difference. First operand 1091 states and 3494 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 19:59:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:57,072 INFO L93 Difference]: Finished difference Result 1490 states and 4596 transitions. [2021-06-12 19:59:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 24 [2021-06-12 19:59:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:57,074 INFO L225 Difference]: With dead ends: 1490 [2021-06-12 19:59:57,074 INFO L226 Difference]: Without dead ends: 1399 [2021-06-12 19:59:57,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-06-12 19:59:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1071. [2021-06-12 19:59:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 3.2009345794392523) internal successors, (3425), 1070 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 3425 transitions. [2021-06-12 19:59:57,085 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 3425 transitions. Word has length 24 [2021-06-12 19:59:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:57,085 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 3425 transitions. [2021-06-12 19:59:57,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 19:59:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 3425 transitions. [2021-06-12 19:59:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:57,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:57,087 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1663 [2021-06-12 19:59:57,287 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1908820380, now seen corresponding path program 214 times [2021-06-12 19:59:57,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686449197] [2021-06-12 19:59:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:57,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686449197] [2021-06-12 19:59:57,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686449197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467449214] [2021-06-12 19:59:57,407 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 19:59:57,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:57,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,494 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 26 treesize of output 20 [2021-06-12 19:59:57,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,496 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 25 treesize of output 19 [2021-06-12 19:59:57,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,512 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 19:59:57,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:49 [2021-06-12 19:59:57,611 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:59:57,613 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 27 treesize of output 21 [2021-06-12 19:59:57,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,615 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 27 treesize of output 21 [2021-06-12 19:59:57,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,636 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-06-12 19:59:57,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,638 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 11 treesize of output 7 [2021-06-12 19:59:57,639 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:57,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,645 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 19:59:57,645 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-06-12 19:59:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467449214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:57,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:57,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26099027] [2021-06-12 19:59:57,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:57,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:57,677 INFO L87 Difference]: Start difference. First operand 1071 states and 3425 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:57,890 INFO L93 Difference]: Finished difference Result 1255 states and 3870 transitions. [2021-06-12 19:59:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 19:59:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:57,892 INFO L225 Difference]: With dead ends: 1255 [2021-06-12 19:59:57,892 INFO L226 Difference]: Without dead ends: 1182 [2021-06-12 19:59:57,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-06-12 19:59:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1076. [2021-06-12 19:59:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 3.1972093023255814) internal successors, (3437), 1075 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3437 transitions. [2021-06-12 19:59:57,903 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3437 transitions. Word has length 24 [2021-06-12 19:59:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:57,903 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 3437 transitions. [2021-06-12 19:59:57,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 19:59:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3437 transitions. [2021-06-12 19:59:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:57,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:57,904 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-12 19:59:58,104 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -193439838, now seen corresponding path program 215 times [2021-06-12 19:59:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:58,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008567493] [2021-06-12 19:59:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:58,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008567493] [2021-06-12 19:59:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008567493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704952948] [2021-06-12 19:59:58,269 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 19:59:58,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:59:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:58,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,347 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 19:59:58,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,349 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 18 treesize of output 14 [2021-06-12 19:59:58,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,363 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 19:59:58,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-06-12 19:59:58,461 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 19:59:58,463 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 19 treesize of output 15 [2021-06-12 19:59:58,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,466 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 19 treesize of output 15 [2021-06-12 19:59:58,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,486 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 12 treesize of output 8 [2021-06-12 19:59:58,487 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:58,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,489 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 12 treesize of output 8 [2021-06-12 19:59:58,490 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:58,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:58,513 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 19:59:58,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 19:59:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:58,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704952948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:58,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:58,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597346513] [2021-06-12 19:59:58,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:58,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:58,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:58,555 INFO L87 Difference]: Start difference. First operand 1076 states and 3437 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 19:59:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:59,003 INFO L93 Difference]: Finished difference Result 1278 states and 3977 transitions. [2021-06-12 19:59:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:59,004 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 24 [2021-06-12 19:59:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:59,005 INFO L225 Difference]: With dead ends: 1278 [2021-06-12 19:59:59,005 INFO L226 Difference]: Without dead ends: 1219 [2021-06-12 19:59:59,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-12 19:59:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1076. [2021-06-12 19:59:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 3.1972093023255814) internal successors, (3437), 1075 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3437 transitions. [2021-06-12 19:59:59,015 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3437 transitions. Word has length 24 [2021-06-12 19:59:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:59,015 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 3437 transitions. [2021-06-12 19:59:59,015 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 19:59:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3437 transitions. [2021-06-12 19:59:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:59:59,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:59,016 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:59,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1675 [2021-06-12 19:59:59,217 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1931411654, now seen corresponding path program 216 times [2021-06-12 19:59:59,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:59,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741589870] [2021-06-12 19:59:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:59,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:59,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741589870] [2021-06-12 19:59:59,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741589870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734274638] [2021-06-12 19:59:59,369 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 19:59:59,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:59:59,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:59,438 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 27 treesize of output 21 [2021-06-12 19:59:59,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:59,441 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 26 treesize of output 20 [2021-06-12 19:59:59,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,443 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 26 treesize of output 20 [2021-06-12 19:59:59,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,446 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 27 treesize of output 21 [2021-06-12 19:59:59,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:59,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:59,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:59,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-06-12 19:59:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 19:59:59,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,556 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 19 treesize of output 15 [2021-06-12 19:59:59,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,559 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 19:59:59,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,562 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 19:59:59,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,565 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 28 treesize of output 22 [2021-06-12 19:59:59,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,569 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 19:59:59,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,572 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 19:59:59,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,576 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 28 treesize of output 22 [2021-06-12 19:59:59,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:59,579 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,582 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 28 treesize of output 22 [2021-06-12 19:59:59,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,585 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 19 treesize of output 15 [2021-06-12 19:59:59,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 19:59:59,588 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,684 INFO L628 ElimStorePlain]: treesize reduction 101, result has 50.7 percent of original size [2021-06-12 19:59:59,684 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 19:59:59,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:59:59,686 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:425, output treesize:104 [2021-06-12 19:59:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:59:59,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734274638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:59,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:59:59,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224284815] [2021-06-12 19:59:59,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:59,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:59,786 INFO L87 Difference]: Start difference. First operand 1076 states and 3437 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:00:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:00,391 INFO L93 Difference]: Finished difference Result 1384 states and 4175 transitions. [2021-06-12 20:00:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 24 [2021-06-12 20:00:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:00,393 INFO L225 Difference]: With dead ends: 1384 [2021-06-12 20:00:00,393 INFO L226 Difference]: Without dead ends: 1253 [2021-06-12 20:00:00,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-06-12 20:00:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1078. [2021-06-12 20:00:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.1940575673166203) internal successors, (3440), 1077 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3440 transitions. [2021-06-12 20:00:00,404 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3440 transitions. Word has length 24 [2021-06-12 20:00:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:00,404 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 3440 transitions. [2021-06-12 20:00:00,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:00:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3440 transitions. [2021-06-12 20:00:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:00,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:00,405 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:00,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,605 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1952730500, now seen corresponding path program 217 times [2021-06-12 20:00:00,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:00,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475826430] [2021-06-12 20:00:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:00,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475826430] [2021-06-12 20:00:00,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475826430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2994210] [2021-06-12 20:00:00,755 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 20:00:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,836 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 35 treesize of output 27 [2021-06-12 20:00:00,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-06-12 20:00:00,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:00,841 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 27 treesize of output 21 [2021-06-12 20:00:00,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:00,844 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 26 treesize of output 20 [2021-06-12 20:00:00,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,909 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-06-12 20:00:00,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:00,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:124 [2021-06-12 20:00:00,978 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 37 treesize of output 29 [2021-06-12 20:00:00,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,981 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 28 treesize of output 22 [2021-06-12 20:00:00,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,983 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 37 treesize of output 29 [2021-06-12 20:00:00,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,986 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 28 treesize of output 22 [2021-06-12 20:00:00,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,005 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-06-12 20:00:01,005 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:01,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,005 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:173, output treesize:15 [2021-06-12 20:00:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:01,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2994210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:01,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:00:01,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612359930] [2021-06-12 20:00:01,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:00:01,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:00:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:00:01,036 INFO L87 Difference]: Start difference. First operand 1078 states and 3440 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 20:00:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:01,233 INFO L93 Difference]: Finished difference Result 1178 states and 3680 transitions. [2021-06-12 20:00:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:01,233 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 24 [2021-06-12 20:00:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:01,234 INFO L225 Difference]: With dead ends: 1178 [2021-06-12 20:00:01,235 INFO L226 Difference]: Without dead ends: 1119 [2021-06-12 20:00:01,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-12 20:00:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1078. [2021-06-12 20:00:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.1940575673166203) internal successors, (3440), 1077 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3440 transitions. [2021-06-12 20:00:01,244 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3440 transitions. Word has length 24 [2021-06-12 20:00:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:01,245 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 3440 transitions. [2021-06-12 20:00:01,245 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 20:00:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3440 transitions. [2021-06-12 20:00:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:01,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:01,246 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:01,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-12 20:00:01,446 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash 604264980, now seen corresponding path program 218 times [2021-06-12 20:00:01,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:01,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168743670] [2021-06-12 20:00:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:01,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168743670] [2021-06-12 20:00:01,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168743670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392386920] [2021-06-12 20:00:01,616 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 20:00:01,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:01,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:01,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:00:01,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,741 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 26 treesize of output 20 [2021-06-12 20:00:01,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,760 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 20:00:01,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:51 [2021-06-12 20:00:01,807 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_772], 1=[o_0, v_prenex_771]} [2021-06-12 20:00:01,809 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 20:00:01,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,830 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 20 treesize of output 16 [2021-06-12 20:00:01,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,850 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 12 treesize of output 8 [2021-06-12 20:00:01,851 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:01,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,869 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 13 treesize of output 9 [2021-06-12 20:00:01,871 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:01,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,887 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 20:00:01,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-12 20:00:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392386920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:01,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:01,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977355962] [2021-06-12 20:00:01,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:01,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:01,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:01,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:01,948 INFO L87 Difference]: Start difference. First operand 1078 states and 3440 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:02,171 INFO L93 Difference]: Finished difference Result 1170 states and 3672 transitions. [2021-06-12 20:00:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:02,173 INFO L225 Difference]: With dead ends: 1170 [2021-06-12 20:00:02,173 INFO L226 Difference]: Without dead ends: 1135 [2021-06-12 20:00:02,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-12 20:00:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1078. [2021-06-12 20:00:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.1940575673166203) internal successors, (3440), 1077 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3440 transitions. [2021-06-12 20:00:02,184 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3440 transitions. Word has length 24 [2021-06-12 20:00:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:02,184 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 3440 transitions. [2021-06-12 20:00:02,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3440 transitions. [2021-06-12 20:00:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:02,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:02,185 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:02,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1690 [2021-06-12 20:00:02,386 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash 66772124, now seen corresponding path program 219 times [2021-06-12 20:00:02,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:02,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907804028] [2021-06-12 20:00:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:02,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907804028] [2021-06-12 20:00:02,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907804028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456189722] [2021-06-12 20:00:02,545 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 20:00:02,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:02,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:02,629 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 20:00:02,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,631 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 20:00:02,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:02,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 20:00:02,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,698 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 20 treesize of output 16 [2021-06-12 20:00:02,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,701 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 20 treesize of output 16 [2021-06-12 20:00:02,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,705 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 20:00:02,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,707 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 20:00:02,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,746 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 7 [2021-06-12 20:00:02,747 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:02,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,750 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 13 treesize of output 9 [2021-06-12 20:00:02,751 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:02,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,754 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 13 treesize of output 9 [2021-06-12 20:00:02,755 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:02,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,757 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 12 treesize of output 8 [2021-06-12 20:00:02,758 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:02,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,793 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 20:00:02,793 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:141, output treesize:57 [2021-06-12 20:00:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:02,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456189722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:02,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:02,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901201422] [2021-06-12 20:00:02,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:02,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:02,879 INFO L87 Difference]: Start difference. First operand 1078 states and 3440 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:03,561 INFO L93 Difference]: Finished difference Result 1273 states and 3973 transitions. [2021-06-12 20:00:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:03,563 INFO L225 Difference]: With dead ends: 1273 [2021-06-12 20:00:03,563 INFO L226 Difference]: Without dead ends: 1185 [2021-06-12 20:00:03,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-12 20:00:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1084. [2021-06-12 20:00:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 3.193905817174515) internal successors, (3459), 1083 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3459 transitions. [2021-06-12 20:00:03,574 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3459 transitions. Word has length 24 [2021-06-12 20:00:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:03,574 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 3459 transitions. [2021-06-12 20:00:03,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3459 transitions. [2021-06-12 20:00:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:03,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:03,575 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:03,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1696 [2021-06-12 20:00:03,776 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:03,776 INFO L82 PathProgramCache]: Analyzing trace with hash 128852794, now seen corresponding path program 220 times [2021-06-12 20:00:03,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:03,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268668496] [2021-06-12 20:00:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:04,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268668496] [2021-06-12 20:00:04,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268668496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971232035] [2021-06-12 20:00:04,013 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 20:00:04,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:04,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,085 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 20:00:04,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:04,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,104 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 18 treesize of output 14 [2021-06-12 20:00:04,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,107 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 20:00:04,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:04,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-06-12 20:00:04,311 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:00:04,313 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 20:00:04,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:04,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,336 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-12 20:00:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,338 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 12 treesize of output 8 [2021-06-12 20:00:04,339 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:04,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:04,346 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 20:00:04,346 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-12 20:00:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:04,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971232035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:04,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:04,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961616076] [2021-06-12 20:00:04,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:04,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:04,379 INFO L87 Difference]: Start difference. First operand 1084 states and 3459 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:04,911 INFO L93 Difference]: Finished difference Result 1590 states and 4745 transitions. [2021-06-12 20:00:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:04,913 INFO L225 Difference]: With dead ends: 1590 [2021-06-12 20:00:04,913 INFO L226 Difference]: Without dead ends: 1490 [2021-06-12 20:00:04,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-12 20:00:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1099. [2021-06-12 20:00:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.1921675774134792) internal successors, (3505), 1098 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3505 transitions. [2021-06-12 20:00:04,926 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3505 transitions. Word has length 24 [2021-06-12 20:00:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:04,926 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3505 transitions. [2021-06-12 20:00:04,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3505 transitions. [2021-06-12 20:00:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:04,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:04,927 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,128 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1973407424, now seen corresponding path program 221 times [2021-06-12 20:00:05,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497269660] [2021-06-12 20:00:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:05,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:05,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497269660] [2021-06-12 20:00:05,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497269660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019500480] [2021-06-12 20:00:05,266 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 20:00:05,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:05,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:05,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:05,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:05,331 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 17 treesize of output 13 [2021-06-12 20:00:05,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:05,333 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 18 treesize of output 14 [2021-06-12 20:00:05,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:05,350 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 20:00:05,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-06-12 20:00:05,502 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:00:05,504 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 19 treesize of output 15 [2021-06-12 20:00:05,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,507 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 19 treesize of output 15 [2021-06-12 20:00:05,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:05,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:05,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:05,528 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 12 treesize of output 8 [2021-06-12 20:00:05,529 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:05,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:05,531 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 12 treesize of output 8 [2021-06-12 20:00:05,532 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:05,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:05,549 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 20:00:05,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-12 20:00:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:05,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019500480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:05,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:05,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236753222] [2021-06-12 20:00:05,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:05,597 INFO L87 Difference]: Start difference. First operand 1099 states and 3505 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:06,705 INFO L93 Difference]: Finished difference Result 1540 states and 4675 transitions. [2021-06-12 20:00:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:06,707 INFO L225 Difference]: With dead ends: 1540 [2021-06-12 20:00:06,707 INFO L226 Difference]: Without dead ends: 1454 [2021-06-12 20:00:06,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:00:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-12 20:00:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1112. [2021-06-12 20:00:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.1935193519351937) internal successors, (3548), 1111 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3548 transitions. [2021-06-12 20:00:06,725 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3548 transitions. Word has length 24 [2021-06-12 20:00:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:06,725 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3548 transitions. [2021-06-12 20:00:06,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3548 transitions. [2021-06-12 20:00:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:06,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:06,726 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:06,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-12 20:00:06,929 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash 583588056, now seen corresponding path program 222 times [2021-06-12 20:00:06,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:06,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270035695] [2021-06-12 20:00:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:07,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:07,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270035695] [2021-06-12 20:00:07,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270035695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751305298] [2021-06-12 20:00:07,093 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 20:00:07,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:07,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,155 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 17 treesize of output 13 [2021-06-12 20:00:07,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,158 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 18 treesize of output 14 [2021-06-12 20:00:07,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,174 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 20:00:07,174 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-06-12 20:00:07,294 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_779, o_4], 1=[v_prenex_778, o_0]} [2021-06-12 20:00:07,297 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 20 treesize of output 16 [2021-06-12 20:00:07,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,299 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 20 treesize of output 16 [2021-06-12 20:00:07,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,345 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 20:00:07,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,347 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 20:00:07,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,390 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 13 treesize of output 9 [2021-06-12 20:00:07,391 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:00:07,394 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:07,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,435 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 12 treesize of output 8 [2021-06-12 20:00:07,437 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:07,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,439 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 8 [2021-06-12 20:00:07,440 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:07,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:07,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:07,477 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-12 20:00:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:07,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751305298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:07,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:07,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244953875] [2021-06-12 20:00:07,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:07,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:07,575 INFO L87 Difference]: Start difference. First operand 1112 states and 3548 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:08,955 INFO L93 Difference]: Finished difference Result 1667 states and 4998 transitions. [2021-06-12 20:00:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:08,957 INFO L225 Difference]: With dead ends: 1667 [2021-06-12 20:00:08,957 INFO L226 Difference]: Without dead ends: 1536 [2021-06-12 20:00:08,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1290.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:00:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-12 20:00:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1111. [2021-06-12 20:00:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.2099099099099098) internal successors, (3563), 1110 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3563 transitions. [2021-06-12 20:00:08,970 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3563 transitions. Word has length 24 [2021-06-12 20:00:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:08,970 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3563 transitions. [2021-06-12 20:00:08,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3563 transitions. [2021-06-12 20:00:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:08,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:08,972 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:09,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1722,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:09,172 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash 294542010, now seen corresponding path program 223 times [2021-06-12 20:00:09,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:09,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279518949] [2021-06-12 20:00:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:09,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:09,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279518949] [2021-06-12 20:00:09,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279518949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277468880] [2021-06-12 20:00:09,316 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 20:00:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,396 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 17 treesize of output 13 [2021-06-12 20:00:09,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,400 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 18 treesize of output 14 [2021-06-12 20:00:09,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,403 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 17 treesize of output 13 [2021-06-12 20:00:09,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:09,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:09,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:09,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-06-12 20:00:09,624 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 37 treesize of output 29 [2021-06-12 20:00:09,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,627 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 37 treesize of output 29 [2021-06-12 20:00:09,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,629 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 37 treesize of output 29 [2021-06-12 20:00:09,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,632 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 37 treesize of output 29 [2021-06-12 20:00:09,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,652 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-06-12 20:00:09,652 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:09,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-06-12 20:00:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277468880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:09,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:00:09,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194720185] [2021-06-12 20:00:09,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:00:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:00:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:00:09,685 INFO L87 Difference]: Start difference. First operand 1111 states and 3563 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 20:00:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:09,949 INFO L93 Difference]: Finished difference Result 1447 states and 4422 transitions. [2021-06-12 20:00:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:09,950 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 24 [2021-06-12 20:00:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:09,951 INFO L225 Difference]: With dead ends: 1447 [2021-06-12 20:00:09,951 INFO L226 Difference]: Without dead ends: 1362 [2021-06-12 20:00:09,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-12 20:00:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1110. [2021-06-12 20:00:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 3.2037871956717763) internal successors, (3553), 1109 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3553 transitions. [2021-06-12 20:00:09,963 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3553 transitions. Word has length 24 [2021-06-12 20:00:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:09,963 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3553 transitions. [2021-06-12 20:00:09,963 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 20:00:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3553 transitions. [2021-06-12 20:00:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:09,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:09,965 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:10,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1737 [2021-06-12 20:00:10,165 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash -679322886, now seen corresponding path program 224 times [2021-06-12 20:00:10,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:10,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085673419] [2021-06-12 20:00:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:10,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:10,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085673419] [2021-06-12 20:00:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085673419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464217619] [2021-06-12 20:00:10,297 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 20:00:10,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:10,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,371 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 17 treesize of output 13 [2021-06-12 20:00:10,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,375 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 20:00:10,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:10,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,381 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 18 treesize of output 14 [2021-06-12 20:00:10,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:10,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:10,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-06-12 20:00:10,631 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:00:10,633 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 27 treesize of output 21 [2021-06-12 20:00:10,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,641 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 22 treesize of output 14 [2021-06-12 20:00:10,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,647 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, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-06-12 20:00:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:10,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464217619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:10,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161320782] [2021-06-12 20:00:10,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:10,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:10,682 INFO L87 Difference]: Start difference. First operand 1110 states and 3553 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:11,070 INFO L93 Difference]: Finished difference Result 1450 states and 4509 transitions. [2021-06-12 20:00:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:11,072 INFO L225 Difference]: With dead ends: 1450 [2021-06-12 20:00:11,072 INFO L226 Difference]: Without dead ends: 1373 [2021-06-12 20:00:11,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-12 20:00:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1110. [2021-06-12 20:00:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 3.2037871956717763) internal successors, (3553), 1109 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3553 transitions. [2021-06-12 20:00:11,085 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3553 transitions. Word has length 24 [2021-06-12 20:00:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:11,085 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3553 transitions. [2021-06-12 20:00:11,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3553 transitions. [2021-06-12 20:00:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:11,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:11,086 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:11,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1744,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,287 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:11,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1887548576, now seen corresponding path program 225 times [2021-06-12 20:00:11,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:11,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697476935] [2021-06-12 20:00:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:11,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:11,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697476935] [2021-06-12 20:00:11,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697476935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185701338] [2021-06-12 20:00:11,457 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 20:00:11,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:11,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,534 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 18 treesize of output 14 [2021-06-12 20:00:11,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:11,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,563 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 20:00:11,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-06-12 20:00:11,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:11,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,725 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 19 treesize of output 15 [2021-06-12 20:00:11,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,753 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 7 [2021-06-12 20:00:11,754 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:11,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,757 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 11 treesize of output 7 [2021-06-12 20:00:11,758 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:11,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,781 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 20:00:11,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 20:00:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:11,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185701338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:11,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:11,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649667608] [2021-06-12 20:00:11,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:11,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:11,841 INFO L87 Difference]: Start difference. First operand 1110 states and 3553 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:12,725 INFO L93 Difference]: Finished difference Result 1467 states and 4547 transitions. [2021-06-12 20:00:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:12,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:12,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:12,727 INFO L225 Difference]: With dead ends: 1467 [2021-06-12 20:00:12,727 INFO L226 Difference]: Without dead ends: 1384 [2021-06-12 20:00:12,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-12 20:00:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1098. [2021-06-12 20:00:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 3.203281677301732) internal successors, (3514), 1097 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 3514 transitions. [2021-06-12 20:00:12,740 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 3514 transitions. Word has length 24 [2021-06-12 20:00:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:12,740 INFO L482 AbstractCegarLoop]: Abstraction has 1098 states and 3514 transitions. [2021-06-12 20:00:12,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 3514 transitions. [2021-06-12 20:00:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:12,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:12,741 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:12,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-12 20:00:12,941 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash 658620504, now seen corresponding path program 226 times [2021-06-12 20:00:12,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:12,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886678159] [2021-06-12 20:00:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:13,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886678159] [2021-06-12 20:00:13,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886678159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131860839] [2021-06-12 20:00:13,158 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 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 20:00:13,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:13,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:13,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:13,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:13,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,258 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 18 treesize of output 14 [2021-06-12 20:00:13,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,261 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 18 treesize of output 14 [2021-06-12 20:00:13,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,265 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 17 treesize of output 13 [2021-06-12 20:00:13,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,268 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 20:00:13,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:13,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:13,330 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:00:13,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:13,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,538 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 20 treesize of output 16 [2021-06-12 20:00:13,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,754 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2021-06-12 20:00:13,755 INFO L628 ElimStorePlain]: treesize reduction 188, result has 54.3 percent of original size [2021-06-12 20:00:13,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,759 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 8 [2021-06-12 20:00:13,760 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:13,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:13,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,856 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 20 treesize of output 16 [2021-06-12 20:00:13,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:13,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,944 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 12 treesize of output 8 [2021-06-12 20:00:13,945 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:14,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,031 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 20:00:14,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:00:14,116 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:14,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,199 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 9 treesize of output 7 [2021-06-12 20:00:14,200 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:14,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_799 vanished before elimination [2021-06-12 20:00:14,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:00:14,281 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:425, output treesize:102 [2021-06-12 20:00:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131860839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:14,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855142412] [2021-06-12 20:00:14,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:14,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:14,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:14,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:14,420 INFO L87 Difference]: Start difference. First operand 1098 states and 3514 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:14,854 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-12 20:00:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:15,529 INFO L93 Difference]: Finished difference Result 1641 states and 5013 transitions. [2021-06-12 20:00:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:15,531 INFO L225 Difference]: With dead ends: 1641 [2021-06-12 20:00:15,531 INFO L226 Difference]: Without dead ends: 1554 [2021-06-12 20:00:15,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-12 20:00:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1094. [2021-06-12 20:00:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1957913998170175) internal successors, (3493), 1093 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3493 transitions. [2021-06-12 20:00:15,545 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3493 transitions. Word has length 24 [2021-06-12 20:00:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:15,545 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3493 transitions. [2021-06-12 20:00:15,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3493 transitions. [2021-06-12 20:00:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:15,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:15,546 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:15,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-12 20:00:15,747 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -897345318, now seen corresponding path program 227 times [2021-06-12 20:00:15,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:15,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147834853] [2021-06-12 20:00:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:15,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:15,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147834853] [2021-06-12 20:00:15,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147834853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526341803] [2021-06-12 20:00:15,908 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 20:00:15,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:15,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:15,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:15,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,033 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 18 treesize of output 14 [2021-06-12 20:00:16,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,036 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 20:00:16,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,061 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 20:00:16,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-06-12 20:00:16,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,170 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 20:00:16,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,172 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 19 treesize of output 15 [2021-06-12 20:00:16,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:00:16,203 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:16,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,205 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 7 [2021-06-12 20:00:16,206 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:16,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,232 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 20:00:16,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 20:00:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:16,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526341803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:16,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:16,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224995779] [2021-06-12 20:00:16,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:16,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:16,284 INFO L87 Difference]: Start difference. First operand 1094 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:16,870 INFO L93 Difference]: Finished difference Result 1228 states and 3860 transitions. [2021-06-12 20:00:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:16,872 INFO L225 Difference]: With dead ends: 1228 [2021-06-12 20:00:16,872 INFO L226 Difference]: Without dead ends: 1169 [2021-06-12 20:00:16,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-12 20:00:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1094. [2021-06-12 20:00:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1957913998170175) internal successors, (3493), 1093 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3493 transitions. [2021-06-12 20:00:16,882 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3493 transitions. Word has length 24 [2021-06-12 20:00:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3493 transitions. [2021-06-12 20:00:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3493 transitions. [2021-06-12 20:00:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:16,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:16,883 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:17,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-12 20:00:17,084 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1659650162, now seen corresponding path program 228 times [2021-06-12 20:00:17,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:17,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182172704] [2021-06-12 20:00:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:17,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:17,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182172704] [2021-06-12 20:00:17,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182172704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393998347] [2021-06-12 20:00:17,265 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 20:00:17,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:17,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:17,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:00:17,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,466 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 20:00:17,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-06-12 20:00:17,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,554 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 20 treesize of output 16 [2021-06-12 20:00:17,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,557 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 20 treesize of output 16 [2021-06-12 20:00:17,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,658 INFO L628 ElimStorePlain]: treesize reduction 71, result has 61.2 percent of original size [2021-06-12 20:00:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,662 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 12 treesize of output 8 [2021-06-12 20:00:17,663 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:17,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,709 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 19 treesize of output 15 [2021-06-12 20:00:17,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,752 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 11 treesize of output 7 [2021-06-12 20:00:17,753 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:17,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:17,795 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-06-12 20:00:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:17,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393998347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:17,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:17,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759373749] [2021-06-12 20:00:17,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:17,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:17,879 INFO L87 Difference]: Start difference. First operand 1094 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:18,170 INFO L93 Difference]: Finished difference Result 1188 states and 3716 transitions. [2021-06-12 20:00:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:18,172 INFO L225 Difference]: With dead ends: 1188 [2021-06-12 20:00:18,172 INFO L226 Difference]: Without dead ends: 1139 [2021-06-12 20:00:18,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-12 20:00:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1094. [2021-06-12 20:00:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1957913998170175) internal successors, (3493), 1093 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3493 transitions. [2021-06-12 20:00:18,182 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3493 transitions. Word has length 24 [2021-06-12 20:00:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:18,182 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3493 transitions. [2021-06-12 20:00:18,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3493 transitions. [2021-06-12 20:00:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:18,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:18,183 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:18,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1779 [2021-06-12 20:00:18,383 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:18,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1786047620, now seen corresponding path program 229 times [2021-06-12 20:00:18,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:18,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985808932] [2021-06-12 20:00:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:18,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:18,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985808932] [2021-06-12 20:00:18,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985808932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329613063] [2021-06-12 20:00:18,546 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 20:00:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:18,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:18,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,695 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 17 treesize of output 13 [2021-06-12 20:00:18,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,699 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 18 treesize of output 14 [2021-06-12 20:00:18,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:18,703 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 18 treesize of output 14 [2021-06-12 20:00:18,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:18,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:18,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:18,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:00:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,005 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 27 treesize of output 21 [2021-06-12 20:00:19,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,008 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 27 treesize of output 21 [2021-06-12 20:00:19,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,045 INFO L628 ElimStorePlain]: treesize reduction 49, result has 44.9 percent of original size [2021-06-12 20:00:19,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,047 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 22 treesize of output 14 [2021-06-12 20:00:19,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,057 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 20:00:19,057 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-06-12 20:00:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:19,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329613063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:19,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712898269] [2021-06-12 20:00:19,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:19,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:19,093 INFO L87 Difference]: Start difference. First operand 1094 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:19,533 INFO L93 Difference]: Finished difference Result 1234 states and 3841 transitions. [2021-06-12 20:00:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:19,535 INFO L225 Difference]: With dead ends: 1234 [2021-06-12 20:00:19,535 INFO L226 Difference]: Without dead ends: 1163 [2021-06-12 20:00:19,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-12 20:00:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1099. [2021-06-12 20:00:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.2003642987249545) internal successors, (3514), 1098 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3514 transitions. [2021-06-12 20:00:19,546 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3514 transitions. Word has length 24 [2021-06-12 20:00:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:19,546 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3514 transitions. [2021-06-12 20:00:19,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3514 transitions. [2021-06-12 20:00:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:19,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:19,547 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:19,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1788 [2021-06-12 20:00:19,747 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash 770947860, now seen corresponding path program 230 times [2021-06-12 20:00:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:19,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365706194] [2021-06-12 20:00:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:19,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:19,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365706194] [2021-06-12 20:00:19,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365706194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967906097] [2021-06-12 20:00:19,920 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 20:00:19,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:20,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,066 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 18 treesize of output 14 [2021-06-12 20:00:20,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:20,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,074 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 17 treesize of output 13 [2021-06-12 20:00:20,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,077 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 17 treesize of output 13 [2021-06-12 20:00:20,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:20,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:00:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,358 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 20 treesize of output 16 [2021-06-12 20:00:20,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,361 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 20 treesize of output 16 [2021-06-12 20:00:20,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,464 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-12 20:00:20,464 INFO L628 ElimStorePlain]: treesize reduction 71, result has 61.2 percent of original size [2021-06-12 20:00:20,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,467 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 12 treesize of output 8 [2021-06-12 20:00:20,468 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:20,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,514 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 20:00:20,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:20,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:20,567 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 11 treesize of output 7 [2021-06-12 20:00:20,568 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:20,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:20,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:20,609 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-06-12 20:00:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:20,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967906097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:20,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:20,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:20,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478419581] [2021-06-12 20:00:20,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:20,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:20,688 INFO L87 Difference]: Start difference. First operand 1099 states and 3514 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 20:00:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:21,055 INFO L93 Difference]: Finished difference Result 1300 states and 3986 transitions. [2021-06-12 20:00:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:21,055 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 24 [2021-06-12 20:00:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:21,056 INFO L225 Difference]: With dead ends: 1300 [2021-06-12 20:00:21,056 INFO L226 Difference]: Without dead ends: 1212 [2021-06-12 20:00:21,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-12 20:00:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1101. [2021-06-12 20:00:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.199090909090909) internal successors, (3519), 1100 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3519 transitions. [2021-06-12 20:00:21,068 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3519 transitions. Word has length 24 [2021-06-12 20:00:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:21,068 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3519 transitions. [2021-06-12 20:00:21,068 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 20:00:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3519 transitions. [2021-06-12 20:00:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:21,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:21,069 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:21,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-12 20:00:21,269 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 990243836, now seen corresponding path program 231 times [2021-06-12 20:00:21,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:21,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137244832] [2021-06-12 20:00:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:21,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:21,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137244832] [2021-06-12 20:00:21,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137244832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245348057] [2021-06-12 20:00:21,420 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 20:00:21,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:21,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,515 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 20:00:21,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,518 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 18 treesize of output 14 [2021-06-12 20:00:21,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,546 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 20:00:21,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 20:00:21,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,709 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 19 treesize of output 15 [2021-06-12 20:00:21,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,712 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 20:00:21,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,740 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 11 treesize of output 7 [2021-06-12 20:00:21,741 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:21,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,744 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 11 treesize of output 7 [2021-06-12 20:00:21,745 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:21,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,768 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 20:00:21,768 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 20:00:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245348057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:21,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:21,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050645459] [2021-06-12 20:00:21,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:21,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:21,817 INFO L87 Difference]: Start difference. First operand 1101 states and 3519 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:22,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:22,309 INFO L93 Difference]: Finished difference Result 1224 states and 3828 transitions. [2021-06-12 20:00:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:22,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:22,311 INFO L225 Difference]: With dead ends: 1224 [2021-06-12 20:00:22,311 INFO L226 Difference]: Without dead ends: 1169 [2021-06-12 20:00:22,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-12 20:00:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1102. [2021-06-12 20:00:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.1952770208901) internal successors, (3518), 1101 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3518 transitions. [2021-06-12 20:00:22,321 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3518 transitions. Word has length 24 [2021-06-12 20:00:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:22,321 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3518 transitions. [2021-06-12 20:00:22,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3518 transitions. [2021-06-12 20:00:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:22,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:22,322 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:22,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1807,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:22,523 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1043392644, now seen corresponding path program 232 times [2021-06-12 20:00:22,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:22,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867496617] [2021-06-12 20:00:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:22,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:22,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867496617] [2021-06-12 20:00:22,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867496617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961551452] [2021-06-12 20:00:22,733 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 20:00:22,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:22,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:22,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,866 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 20:00:22,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,870 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 17 treesize of output 13 [2021-06-12 20:00:22,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,874 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 18 treesize of output 14 [2021-06-12 20:00:22,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:22,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:22,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:22,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:00:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,178 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 19 treesize of output 15 [2021-06-12 20:00:23,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:00:23,211 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:23,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,240 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 19 treesize of output 15 [2021-06-12 20:00:23,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:23,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:23,268 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 11 treesize of output 7 [2021-06-12 20:00:23,269 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:23,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:23,293 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 20:00:23,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:37 [2021-06-12 20:00:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:23,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961551452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:23,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:23,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151586301] [2021-06-12 20:00:23,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:23,361 INFO L87 Difference]: Start difference. First operand 1102 states and 3518 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:23,775 INFO L93 Difference]: Finished difference Result 1236 states and 3902 transitions. [2021-06-12 20:00:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:23,777 INFO L225 Difference]: With dead ends: 1236 [2021-06-12 20:00:23,777 INFO L226 Difference]: Without dead ends: 1190 [2021-06-12 20:00:23,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-06-12 20:00:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1095. [2021-06-12 20:00:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 3.196526508226691) internal successors, (3497), 1094 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 3497 transitions. [2021-06-12 20:00:23,788 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 3497 transitions. Word has length 24 [2021-06-12 20:00:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:23,788 INFO L482 AbstractCegarLoop]: Abstraction has 1095 states and 3497 transitions. [2021-06-12 20:00:23,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 3497 transitions. [2021-06-12 20:00:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:23,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:23,789 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:23,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:23,990 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1217284814, now seen corresponding path program 233 times [2021-06-12 20:00:23,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:23,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470366470] [2021-06-12 20:00:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:24,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470366470] [2021-06-12 20:00:24,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470366470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928339857] [2021-06-12 20:00:24,146 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 20:00:24,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:24,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,451 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 17 treesize of output 13 [2021-06-12 20:00:24,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,455 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 18 treesize of output 14 [2021-06-12 20:00:24,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,459 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 20:00:24,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,462 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 17 treesize of output 13 [2021-06-12 20:00:24,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:24,530 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:00:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,661 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 20:00:24,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,728 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 20 treesize of output 16 [2021-06-12 20:00:24,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,792 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 11 treesize of output 7 [2021-06-12 20:00:24,794 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:24,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:00:24,858 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:24,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:24,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,986 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 11 treesize of output 7 [2021-06-12 20:00:24,987 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:25,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:25,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:25,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:25,098 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 12 treesize of output 8 [2021-06-12 20:00:25,100 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:25,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:25,151 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 20:00:25,151 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:81 [2021-06-12 20:00:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:25,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928339857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:25,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630829367] [2021-06-12 20:00:25,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:25,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:25,249 INFO L87 Difference]: Start difference. First operand 1095 states and 3497 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 20:00:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:25,576 INFO L93 Difference]: Finished difference Result 1321 states and 4104 transitions. [2021-06-12 20:00:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:25,576 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 24 [2021-06-12 20:00:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:25,578 INFO L225 Difference]: With dead ends: 1321 [2021-06-12 20:00:25,578 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 20:00:25,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 20:00:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1100. [2021-06-12 20:00:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.205641492265696) internal successors, (3523), 1099 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3523 transitions. [2021-06-12 20:00:25,591 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3523 transitions. Word has length 24 [2021-06-12 20:00:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:25,591 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 3523 transitions. [2021-06-12 20:00:25,591 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 20:00:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3523 transitions. [2021-06-12 20:00:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:25,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:25,592 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:25,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:25,793 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2097558350, now seen corresponding path program 234 times [2021-06-12 20:00:25,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:25,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284923872] [2021-06-12 20:00:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284923872] [2021-06-12 20:00:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284923872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813669336] [2021-06-12 20:00:25,957 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 20:00:25,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,093 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 17 treesize of output 13 [2021-06-12 20:00:26,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,097 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 18 treesize of output 14 [2021-06-12 20:00:26,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,101 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 18 treesize of output 14 [2021-06-12 20:00:26,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,105 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 17 treesize of output 13 [2021-06-12 20:00:26,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:26,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:00:26,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,300 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 19 treesize of output 15 [2021-06-12 20:00:26,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,367 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 20:00:26,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,432 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 7 [2021-06-12 20:00:26,433 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:26,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,503 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 11 treesize of output 7 [2021-06-12 20:00:26,504 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:26,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,566 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 20 treesize of output 16 [2021-06-12 20:00:26,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:00:26,626 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:26,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,684 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 20 treesize of output 16 [2021-06-12 20:00:26,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,740 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 12 treesize of output 8 [2021-06-12 20:00:26,742 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:26,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,793 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 20:00:26,793 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:78 [2021-06-12 20:00:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:26,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813669336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:26,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297555886] [2021-06-12 20:00:26,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:26,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:26,892 INFO L87 Difference]: Start difference. First operand 1100 states and 3523 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 20:00:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:27,157 INFO L93 Difference]: Finished difference Result 1282 states and 4010 transitions. [2021-06-12 20:00:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:27,157 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 24 [2021-06-12 20:00:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:27,159 INFO L225 Difference]: With dead ends: 1282 [2021-06-12 20:00:27,159 INFO L226 Difference]: Without dead ends: 1263 [2021-06-12 20:00:27,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-12 20:00:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1095. [2021-06-12 20:00:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 3.196526508226691) internal successors, (3497), 1094 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 3497 transitions. [2021-06-12 20:00:27,170 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 3497 transitions. Word has length 24 [2021-06-12 20:00:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:27,171 INFO L482 AbstractCegarLoop]: Abstraction has 1095 states and 3497 transitions. [2021-06-12 20:00:27,171 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 20:00:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 3497 transitions. [2021-06-12 20:00:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:27,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:27,172 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:27,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1834 [2021-06-12 20:00:27,381 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1943123386, now seen corresponding path program 235 times [2021-06-12 20:00:27,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:27,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364180906] [2021-06-12 20:00:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:27,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:27,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364180906] [2021-06-12 20:00:27,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364180906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319647533] [2021-06-12 20:00:27,539 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 20:00:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:27,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,664 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 20:00:27,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,668 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 20:00:27,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,746 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 19 treesize of output 15 [2021-06-12 20:00:27,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,750 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 20:00:27,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:27,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 20:00:27,960 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 20:00:27,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,965 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 20:00:27,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,970 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 20 treesize of output 16 [2021-06-12 20:00:27,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,974 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 20 treesize of output 16 [2021-06-12 20:00:27,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,979 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 19 treesize of output 15 [2021-06-12 20:00:27,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,984 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 20:00:27,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,004 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 20 treesize of output 16 [2021-06-12 20:00:28,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,009 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 20 treesize of output 16 [2021-06-12 20:00:28,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,020 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 20:00:28,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,209 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-12 20:00:28,209 INFO L628 ElimStorePlain]: treesize reduction 172, result has 54.0 percent of original size [2021-06-12 20:00:28,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,213 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 11 treesize of output 7 [2021-06-12 20:00:28,214 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:28,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,218 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 13 treesize of output 9 [2021-06-12 20:00:28,233 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:28,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,237 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 8 [2021-06-12 20:00:28,238 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:28,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:28,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:00:28,320 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-06-12 20:00:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:28,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319647533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:28,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:28,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606942497] [2021-06-12 20:00:28,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:28,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:28,461 INFO L87 Difference]: Start difference. First operand 1095 states and 3497 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 20:00:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:29,120 INFO L93 Difference]: Finished difference Result 1342 states and 4158 transitions. [2021-06-12 20:00:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:29,121 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 24 [2021-06-12 20:00:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:29,122 INFO L225 Difference]: With dead ends: 1342 [2021-06-12 20:00:29,122 INFO L226 Difference]: Without dead ends: 1246 [2021-06-12 20:00:29,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-12 20:00:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1102. [2021-06-12 20:00:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.204359673024523) internal successors, (3528), 1101 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3528 transitions. [2021-06-12 20:00:29,134 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3528 transitions. Word has length 24 [2021-06-12 20:00:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:29,134 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3528 transitions. [2021-06-12 20:00:29,134 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 20:00:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3528 transitions. [2021-06-12 20:00:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:29,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:29,135 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:29,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1842,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:29,336 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1062849850, now seen corresponding path program 236 times [2021-06-12 20:00:29,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:29,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966862128] [2021-06-12 20:00:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:29,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966862128] [2021-06-12 20:00:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966862128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607142984] [2021-06-12 20:00:29,447 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 20:00:29,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:29,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:29,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:29,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:29,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:00:29,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 20:00:29,701 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:00:29,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,705 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 20:00:29,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,709 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 20 treesize of output 16 [2021-06-12 20:00:29,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,713 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 20 treesize of output 16 [2021-06-12 20:00:29,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,716 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 19 treesize of output 15 [2021-06-12 20:00:29,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,790 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 12 treesize of output 8 [2021-06-12 20:00:29,791 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,795 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 11 treesize of output 7 [2021-06-12 20:00:29,796 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:29,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,799 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 13 treesize of output 9 [2021-06-12 20:00:29,800 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:29,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,803 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 13 treesize of output 9 [2021-06-12 20:00:29,804 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:29,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,863 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 20:00:29,863 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-12 20:00:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607142984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:29,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388597212] [2021-06-12 20:00:29,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:29,973 INFO L87 Difference]: Start difference. First operand 1102 states and 3528 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 20:00:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:30,691 INFO L93 Difference]: Finished difference Result 1474 states and 4518 transitions. [2021-06-12 20:00:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:30,692 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 24 [2021-06-12 20:00:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:30,693 INFO L225 Difference]: With dead ends: 1474 [2021-06-12 20:00:30,693 INFO L226 Difference]: Without dead ends: 1378 [2021-06-12 20:00:30,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 609.7ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-12 20:00:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1093. [2021-06-12 20:00:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 3.197802197802198) internal successors, (3492), 1092 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 3492 transitions. [2021-06-12 20:00:30,706 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 3492 transitions. Word has length 24 [2021-06-12 20:00:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:30,706 INFO L482 AbstractCegarLoop]: Abstraction has 1093 states and 3492 transitions. [2021-06-12 20:00:30,706 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 20:00:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 3492 transitions. [2021-06-12 20:00:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:30,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:30,707 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:30,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1860 [2021-06-12 20:00:30,907 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1091951062, now seen corresponding path program 237 times [2021-06-12 20:00:30,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:30,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392392997] [2021-06-12 20:00:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:31,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392392997] [2021-06-12 20:00:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392392997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743201692] [2021-06-12 20:00:31,060 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 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 20:00:31,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:31,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:31,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:31,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,129 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 20:00:31,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,132 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 18 treesize of output 14 [2021-06-12 20:00:31,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,149 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 20:00:31,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-12 20:00:31,300 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 20:00:31,302 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 20:00:31,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,304 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 19 treesize of output 15 [2021-06-12 20:00:31,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,325 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 7 [2021-06-12 20:00:31,326 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:31,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,328 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 11 treesize of output 7 [2021-06-12 20:00:31,329 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:31,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:31,346 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 20:00:31,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-12 20:00:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:31,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743201692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:31,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:31,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350006904] [2021-06-12 20:00:31,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:31,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:31,395 INFO L87 Difference]: Start difference. First operand 1093 states and 3492 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:32,457 INFO L93 Difference]: Finished difference Result 1695 states and 5137 transitions. [2021-06-12 20:00:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:32,460 INFO L225 Difference]: With dead ends: 1695 [2021-06-12 20:00:32,460 INFO L226 Difference]: Without dead ends: 1595 [2021-06-12 20:00:32,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:00:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-12 20:00:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1108. [2021-06-12 20:00:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.196025293586269) internal successors, (3538), 1107 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3538 transitions. [2021-06-12 20:00:32,472 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3538 transitions. Word has length 24 [2021-06-12 20:00:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:32,473 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3538 transitions. [2021-06-12 20:00:32,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3538 transitions. [2021-06-12 20:00:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:32,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:32,474 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:32,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1872,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:32,674 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1100756016, now seen corresponding path program 238 times [2021-06-12 20:00:32,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:32,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454618219] [2021-06-12 20:00:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:32,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:32,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454618219] [2021-06-12 20:00:32,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454618219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:32,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821251743] [2021-06-12 20:00:32,807 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 20:00:32,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:32,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,876 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 18 treesize of output 14 [2021-06-12 20:00:32,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,879 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 18 treesize of output 14 [2021-06-12 20:00:32,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,882 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 20:00:32,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,885 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 20:00:32,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:32,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-06-12 20:00:33,117 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-12 20:00:33,118 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 19 treesize of output 15 [2021-06-12 20:00:33,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:33,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:00:33,127 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:33,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:33,133 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 20:00:33,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:11 [2021-06-12 20:00:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:33,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821251743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:33,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:33,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:33,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831157490] [2021-06-12 20:00:33,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:33,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:33,167 INFO L87 Difference]: Start difference. First operand 1108 states and 3538 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:33,894 INFO L93 Difference]: Finished difference Result 1521 states and 4636 transitions. [2021-06-12 20:00:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:33,896 INFO L225 Difference]: With dead ends: 1521 [2021-06-12 20:00:33,896 INFO L226 Difference]: Without dead ends: 1463 [2021-06-12 20:00:33,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-12 20:00:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1118. [2021-06-12 20:00:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.191584601611459) internal successors, (3565), 1117 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3565 transitions. [2021-06-12 20:00:33,909 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3565 transitions. Word has length 24 [2021-06-12 20:00:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:33,909 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 3565 transitions. [2021-06-12 20:00:33,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3565 transitions. [2021-06-12 20:00:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:33,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:33,911 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:34,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:34,111 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -637215800, now seen corresponding path program 239 times [2021-06-12 20:00:34,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:34,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463029011] [2021-06-12 20:00:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:34,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463029011] [2021-06-12 20:00:34,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463029011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477828450] [2021-06-12 20:00:34,263 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 20:00:34,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,340 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 17 treesize of output 13 [2021-06-12 20:00:34,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,343 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 20:00:34,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,347 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 18 treesize of output 14 [2021-06-12 20:00:34,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,350 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 18 treesize of output 14 [2021-06-12 20:00:34,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:34,388 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-06-12 20:00:34,547 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_868], 1=[v_prenex_869, o_4]} [2021-06-12 20:00:34,549 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 27 treesize of output 21 [2021-06-12 20:00:34,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,571 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 20 treesize of output 16 [2021-06-12 20:00:34,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:00:34,592 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:34,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-12 20:00:34,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,626 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 20:00:34,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-06-12 20:00:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:34,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477828450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:34,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:34,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698880169] [2021-06-12 20:00:34,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:34,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:34,688 INFO L87 Difference]: Start difference. First operand 1118 states and 3565 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:35,493 INFO L93 Difference]: Finished difference Result 1564 states and 4731 transitions. [2021-06-12 20:00:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:35,495 INFO L225 Difference]: With dead ends: 1564 [2021-06-12 20:00:35,495 INFO L226 Difference]: Without dead ends: 1490 [2021-06-12 20:00:35,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-12 20:00:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1102. [2021-06-12 20:00:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.2034514078110807) internal successors, (3527), 1101 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3527 transitions. [2021-06-12 20:00:35,507 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3527 transitions. Word has length 24 [2021-06-12 20:00:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:35,508 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3527 transitions. [2021-06-12 20:00:35,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3527 transitions. [2021-06-12 20:00:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:35,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:35,509 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:35,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1896 [2021-06-12 20:00:35,712 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:35,712 INFO L82 PathProgramCache]: Analyzing trace with hash -250672622, now seen corresponding path program 240 times [2021-06-12 20:00:35,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:35,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14687894] [2021-06-12 20:00:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:35,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14687894] [2021-06-12 20:00:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14687894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635296289] [2021-06-12 20:00:35,863 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 20:00:35,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:35,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:35,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:35,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,954 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 17 treesize of output 13 [2021-06-12 20:00:35,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:35,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:35,980 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 2 xjuncts. [2021-06-12 20:00:35,980 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-06-12 20:00:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:36,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:36,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,308 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 11 treesize of output 7 [2021-06-12 20:00:36,309 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:36,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,312 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 7 [2021-06-12 20:00:36,313 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:36,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,333 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 20:00:36,334 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-12 20:00:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:36,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635296289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:36,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:36,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88453306] [2021-06-12 20:00:36,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:36,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:36,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:36,384 INFO L87 Difference]: Start difference. First operand 1102 states and 3527 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:37,466 INFO L93 Difference]: Finished difference Result 1608 states and 4910 transitions. [2021-06-12 20:00:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:37,469 INFO L225 Difference]: With dead ends: 1608 [2021-06-12 20:00:37,469 INFO L226 Difference]: Without dead ends: 1522 [2021-06-12 20:00:37,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1000.1ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:00:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-06-12 20:00:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1115. [2021-06-12 20:00:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.2046678635547576) internal successors, (3570), 1114 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3570 transitions. [2021-06-12 20:00:37,484 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3570 transitions. Word has length 24 [2021-06-12 20:00:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:37,484 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3570 transitions. [2021-06-12 20:00:37,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3570 transitions. [2021-06-12 20:00:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:37,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:37,486 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:37,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1904,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:37,691 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:37,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1988644438, now seen corresponding path program 241 times [2021-06-12 20:00:37,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:37,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801209033] [2021-06-12 20:00:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:37,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:37,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801209033] [2021-06-12 20:00:37,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801209033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866582144] [2021-06-12 20:00:37,875 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 20:00:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:37,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,964 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 18 treesize of output 14 [2021-06-12 20:00:37,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,968 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 20:00:37,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,972 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 17 treesize of output 13 [2021-06-12 20:00:37,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,975 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 18 treesize of output 14 [2021-06-12 20:00:37,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:38,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-12 20:00:38,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:38,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,337 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 20 treesize of output 16 [2021-06-12 20:00:38,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,359 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 12 treesize of output 8 [2021-06-12 20:00:38,360 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:38,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,382 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 11 treesize of output 7 [2021-06-12 20:00:38,383 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:38,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:38,402 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 20:00:38,402 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-06-12 20:00:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:38,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866582144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:38,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:38,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44881346] [2021-06-12 20:00:38,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:38,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:38,480 INFO L87 Difference]: Start difference. First operand 1115 states and 3570 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:38,832 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-12 20:00:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:39,499 INFO L93 Difference]: Finished difference Result 1735 states and 5266 transitions. [2021-06-12 20:00:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:00:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:39,501 INFO L225 Difference]: With dead ends: 1735 [2021-06-12 20:00:39,501 INFO L226 Difference]: Without dead ends: 1669 [2021-06-12 20:00:39,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-12 20:00:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1124. [2021-06-12 20:00:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.210151380231523) internal successors, (3605), 1123 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3605 transitions. [2021-06-12 20:00:39,516 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3605 transitions. Word has length 24 [2021-06-12 20:00:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:39,516 INFO L482 AbstractCegarLoop]: Abstraction has 1124 states and 3605 transitions. [2021-06-12 20:00:39,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3605 transitions. [2021-06-12 20:00:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:39,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:39,517 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:39,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1940,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:39,718 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1168384238, now seen corresponding path program 242 times [2021-06-12 20:00:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:39,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116689073] [2021-06-12 20:00:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:39,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116689073] [2021-06-12 20:00:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116689073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352699668] [2021-06-12 20:00:39,896 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 20:00:39,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,989 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 18 treesize of output 14 [2021-06-12 20:00:39,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,992 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 17 treesize of output 13 [2021-06-12 20:00:39,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,014 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 2 xjuncts. [2021-06-12 20:00:40,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-06-12 20:00:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,118 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 19 treesize of output 15 [2021-06-12 20:00:40,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,144 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 11 treesize of output 7 [2021-06-12 20:00:40,145 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:40,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:40,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:00:40,193 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:40,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:40,212 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 20:00:40,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:81, output treesize:25 [2021-06-12 20:00:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:40,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352699668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:40,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:40,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425587613] [2021-06-12 20:00:40,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:40,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:40,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:40,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:40,319 INFO L87 Difference]: Start difference. First operand 1124 states and 3605 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:41,499 INFO L93 Difference]: Finished difference Result 1704 states and 5163 transitions. [2021-06-12 20:00:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:41,502 INFO L225 Difference]: With dead ends: 1704 [2021-06-12 20:00:41,502 INFO L226 Difference]: Without dead ends: 1630 [2021-06-12 20:00:41,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1103.8ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:00:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-12 20:00:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1136. [2021-06-12 20:00:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2158590308370045) internal successors, (3650), 1135 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3650 transitions. [2021-06-12 20:00:41,515 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3650 transitions. Word has length 24 [2021-06-12 20:00:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:41,515 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3650 transitions. [2021-06-12 20:00:41,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3650 transitions. [2021-06-12 20:00:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:41,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:41,516 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:41,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1949,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:41,716 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 955680116, now seen corresponding path program 243 times [2021-06-12 20:00:41,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:41,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106968328] [2021-06-12 20:00:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106968328] [2021-06-12 20:00:41,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106968328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679909581] [2021-06-12 20:00:41,876 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 20:00:41,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:41,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:41,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,969 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 17 treesize of output 13 [2021-06-12 20:00:41,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,992 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 2 xjuncts. [2021-06-12 20:00:41,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-06-12 20:00:42,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,097 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 20 treesize of output 16 [2021-06-12 20:00:42,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,101 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 20 treesize of output 16 [2021-06-12 20:00:42,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,170 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 12 treesize of output 8 [2021-06-12 20:00:42,171 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:42,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,174 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 12 treesize of output 8 [2021-06-12 20:00:42,175 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:42,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,247 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 19 treesize of output 15 [2021-06-12 20:00:42,247 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,250 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 20:00:42,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,308 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 11 treesize of output 7 [2021-06-12 20:00:42,309 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:42,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,312 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 7 [2021-06-12 20:00:42,313 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:42,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:42,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:42,365 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:181, output treesize:69 [2021-06-12 20:00:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:42,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679909581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:42,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:42,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280609653] [2021-06-12 20:00:42,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:42,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:42,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:42,478 INFO L87 Difference]: Start difference. First operand 1136 states and 3650 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:43,665 INFO L93 Difference]: Finished difference Result 1731 states and 5296 transitions. [2021-06-12 20:00:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:43,667 INFO L225 Difference]: With dead ends: 1731 [2021-06-12 20:00:43,667 INFO L226 Difference]: Without dead ends: 1693 [2021-06-12 20:00:43,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:00:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-12 20:00:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1136. [2021-06-12 20:00:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2158590308370045) internal successors, (3650), 1135 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3650 transitions. [2021-06-12 20:00:43,682 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3650 transitions. Word has length 24 [2021-06-12 20:00:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:43,682 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3650 transitions. [2021-06-12 20:00:43,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3650 transitions. [2021-06-12 20:00:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:43,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:43,684 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:43,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1959,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:43,884 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:43,884 INFO L82 PathProgramCache]: Analyzing trace with hash 696925370, now seen corresponding path program 244 times [2021-06-12 20:00:43,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:43,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915141252] [2021-06-12 20:00:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:44,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:44,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915141252] [2021-06-12 20:00:44,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915141252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292681112] [2021-06-12 20:00:44,024 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 20:00:44,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:44,088 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 24 treesize of output 18 [2021-06-12 20:00:44,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,090 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 24 treesize of output 18 [2021-06-12 20:00:44,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:44,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:44,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 20:00:44,191 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 28 treesize of output 22 [2021-06-12 20:00:44,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:44,197 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:44,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-12 20:00:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:44,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292681112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:44,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:44,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787359117] [2021-06-12 20:00:44,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:44,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:44,233 INFO L87 Difference]: Start difference. First operand 1136 states and 3650 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 20:00:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:44,463 INFO L93 Difference]: Finished difference Result 1405 states and 4380 transitions. [2021-06-12 20:00:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:44,463 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 24 [2021-06-12 20:00:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:44,465 INFO L225 Difference]: With dead ends: 1405 [2021-06-12 20:00:44,465 INFO L226 Difference]: Without dead ends: 1386 [2021-06-12 20:00:44,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-12 20:00:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1135. [2021-06-12 20:00:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.2160493827160495) internal successors, (3647), 1134 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3647 transitions. [2021-06-12 20:00:44,482 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3647 transitions. Word has length 24 [2021-06-12 20:00:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:44,482 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3647 transitions. [2021-06-12 20:00:44,482 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 20:00:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3647 transitions. [2021-06-12 20:00:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:44,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:44,483 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:44,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1967 [2021-06-12 20:00:44,683 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:44,684 INFO L82 PathProgramCache]: Analyzing trace with hash -276939526, now seen corresponding path program 245 times [2021-06-12 20:00:44,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:44,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270333801] [2021-06-12 20:00:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:44,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:44,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270333801] [2021-06-12 20:00:44,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270333801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656352433] [2021-06-12 20:00:44,857 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 20:00:44,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:44,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:00:44,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:00:44,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:44,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:44,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:44,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 20:00:45,040 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 28 treesize of output 22 [2021-06-12 20:00:45,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,045 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:45,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-12 20:00:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:45,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656352433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:45,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:45,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86083703] [2021-06-12 20:00:45,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:45,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:45,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:45,082 INFO L87 Difference]: Start difference. First operand 1135 states and 3647 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 20:00:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:45,451 INFO L93 Difference]: Finished difference Result 1473 states and 4555 transitions. [2021-06-12 20:00:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:45,451 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 24 [2021-06-12 20:00:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:45,453 INFO L225 Difference]: With dead ends: 1473 [2021-06-12 20:00:45,453 INFO L226 Difference]: Without dead ends: 1399 [2021-06-12 20:00:45,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-06-12 20:00:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1094. [2021-06-12 20:00:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1985361390667886) internal successors, (3496), 1093 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3496 transitions. [2021-06-12 20:00:45,465 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3496 transitions. Word has length 24 [2021-06-12 20:00:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:45,465 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3496 transitions. [2021-06-12 20:00:45,465 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 20:00:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3496 transitions. [2021-06-12 20:00:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:45,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:45,466 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:45,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1970,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:45,666 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1323711664, now seen corresponding path program 246 times [2021-06-12 20:00:45,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:45,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640213259] [2021-06-12 20:00:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:45,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:45,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640213259] [2021-06-12 20:00:45,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640213259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067934707] [2021-06-12 20:00:45,769 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 20:00:45,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:45,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:45,846 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 24 treesize of output 18 [2021-06-12 20:00:45,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,848 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 24 treesize of output 18 [2021-06-12 20:00:45,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:45,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 20:00:45,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:00:45,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:00:45,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,943 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-12 20:00:45,943 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:45,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-06-12 20:00:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067934707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:45,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:45,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295161266] [2021-06-12 20:00:45,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:45,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:45,987 INFO L87 Difference]: Start difference. First operand 1094 states and 3496 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 20:00:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:46,197 INFO L93 Difference]: Finished difference Result 1254 states and 3952 transitions. [2021-06-12 20:00:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:46,197 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 24 [2021-06-12 20:00:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:46,199 INFO L225 Difference]: With dead ends: 1254 [2021-06-12 20:00:46,199 INFO L226 Difference]: Without dead ends: 1195 [2021-06-12 20:00:46,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-12 20:00:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1108. [2021-06-12 20:00:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.196025293586269) internal successors, (3538), 1107 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3538 transitions. [2021-06-12 20:00:46,210 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3538 transitions. Word has length 24 [2021-06-12 20:00:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:46,210 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3538 transitions. [2021-06-12 20:00:46,210 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 20:00:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3538 transitions. [2021-06-12 20:00:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:46,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:46,211 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:46,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1973 [2021-06-12 20:00:46,411 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1058293842, now seen corresponding path program 247 times [2021-06-12 20:00:46,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:46,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991421606] [2021-06-12 20:00:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:46,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:46,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991421606] [2021-06-12 20:00:46,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991421606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241472474] [2021-06-12 20:00:46,536 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 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 20:00:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:46,614 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 24 treesize of output 18 [2021-06-12 20:00:46,615 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 24 treesize of output 18 [2021-06-12 20:00:46,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:46,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 20:00:46,673 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 28 treesize of output 22 [2021-06-12 20:00:46,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_889 vanished before elimination [2021-06-12 20:00:46,692 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 28 treesize of output 22 [2021-06-12 20:00:46,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:46,709 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:46,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:46,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 20:00:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:46,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241472474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:46,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471998239] [2021-06-12 20:00:46,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:46,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:46,777 INFO L87 Difference]: Start difference. First operand 1108 states and 3538 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 20:00:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:46,940 INFO L93 Difference]: Finished difference Result 1233 states and 3896 transitions. [2021-06-12 20:00:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:46,940 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 24 [2021-06-12 20:00:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:46,942 INFO L225 Difference]: With dead ends: 1233 [2021-06-12 20:00:46,942 INFO L226 Difference]: Without dead ends: 1202 [2021-06-12 20:00:46,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-06-12 20:00:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1101. [2021-06-12 20:00:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.1972727272727273) internal successors, (3517), 1100 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3517 transitions. [2021-06-12 20:00:46,953 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3517 transitions. Word has length 24 [2021-06-12 20:00:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:46,953 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3517 transitions. [2021-06-12 20:00:46,953 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 20:00:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3517 transitions. [2021-06-12 20:00:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:46,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:46,954 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:47,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1977,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:47,154 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1090502694, now seen corresponding path program 248 times [2021-06-12 20:00:47,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:47,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196888230] [2021-06-12 20:00:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196888230] [2021-06-12 20:00:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196888230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612659715] [2021-06-12 20:00:47,309 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 20:00:47,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:47,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:47,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:00:47,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,389 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 24 treesize of output 18 [2021-06-12 20:00:47,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:47,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:47,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-12 20:00:47,450 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 28 treesize of output 22 [2021-06-12 20:00:47,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,453 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 28 treesize of output 22 [2021-06-12 20:00:47,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,502 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-12 20:00:47,502 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:47,504 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 28 treesize of output 22 [2021-06-12 20:00:47,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:47,524 INFO L518 ElimStorePlain]: Eliminatee v_prenex_891 vanished before elimination [2021-06-12 20:00:47,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:47,524 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-06-12 20:00:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:47,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612659715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:47,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434188045] [2021-06-12 20:00:47,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:47,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:47,597 INFO L87 Difference]: Start difference. First operand 1101 states and 3517 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 20:00:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:47,970 INFO L93 Difference]: Finished difference Result 1400 states and 4360 transitions. [2021-06-12 20:00:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:47,971 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 24 [2021-06-12 20:00:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:47,972 INFO L225 Difference]: With dead ends: 1400 [2021-06-12 20:00:47,972 INFO L226 Difference]: Without dead ends: 1309 [2021-06-12 20:00:47,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-06-12 20:00:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1101. [2021-06-12 20:00:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.1972727272727273) internal successors, (3517), 1100 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3517 transitions. [2021-06-12 20:00:47,984 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3517 transitions. Word has length 24 [2021-06-12 20:00:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:47,985 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3517 transitions. [2021-06-12 20:00:47,985 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 20:00:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3517 transitions. [2021-06-12 20:00:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:47,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:47,986 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:48,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1982 [2021-06-12 20:00:48,186 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1383664260, now seen corresponding path program 249 times [2021-06-12 20:00:48,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:48,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178433666] [2021-06-12 20:00:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:48,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178433666] [2021-06-12 20:00:48,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178433666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871215652] [2021-06-12 20:00:48,320 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 20:00:48,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,442 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 18 treesize of output 14 [2021-06-12 20:00:48,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,445 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 20:00:48,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,470 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 2 xjuncts. [2021-06-12 20:00:48,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-06-12 20:00:48,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,660 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 20:00:48,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,663 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 19 treesize of output 15 [2021-06-12 20:00:48,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,689 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 7 [2021-06-12 20:00:48,690 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:48,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:00:48,693 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:48,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,713 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 20:00:48,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-12 20:00:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:48,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871215652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:48,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421996922] [2021-06-12 20:00:48,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:48,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:48,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:48,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:48,756 INFO L87 Difference]: Start difference. First operand 1101 states and 3517 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 20:00:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:49,467 INFO L93 Difference]: Finished difference Result 1348 states and 4220 transitions. [2021-06-12 20:00:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:49,468 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 24 [2021-06-12 20:00:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:49,469 INFO L225 Difference]: With dead ends: 1348 [2021-06-12 20:00:49,469 INFO L226 Difference]: Without dead ends: 1277 [2021-06-12 20:00:49,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-12 20:00:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1118. [2021-06-12 20:00:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.20680393912265) internal successors, (3582), 1117 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3582 transitions. [2021-06-12 20:00:49,481 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3582 transitions. Word has length 24 [2021-06-12 20:00:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:49,481 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 3582 transitions. [2021-06-12 20:00:49,481 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 20:00:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3582 transitions. [2021-06-12 20:00:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:49,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:49,482 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:49,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1987 [2021-06-12 20:00:49,683 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1173331220, now seen corresponding path program 250 times [2021-06-12 20:00:49,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:49,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955838629] [2021-06-12 20:00:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:49,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:49,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955838629] [2021-06-12 20:00:49,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955838629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549793443] [2021-06-12 20:00:49,850 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 20:00:49,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:49,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,971 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 18 treesize of output 14 [2021-06-12 20:00:49,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,975 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 18 treesize of output 14 [2021-06-12 20:00:49,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,979 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 17 treesize of output 13 [2021-06-12 20:00:49,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,982 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 17 treesize of output 13 [2021-06-12 20:00:49,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:50,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:00:50,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,247 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 20 treesize of output 16 [2021-06-12 20:00:50,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,272 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 27 treesize of output 21 [2021-06-12 20:00:50,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,302 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 11 treesize of output 7 [2021-06-12 20:00:50,303 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:50,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,325 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 12 treesize of output 8 [2021-06-12 20:00:50,326 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:50,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,345 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 20:00:50,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:27 [2021-06-12 20:00:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549793443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:50,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:50,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506059688] [2021-06-12 20:00:50,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:50,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:50,395 INFO L87 Difference]: Start difference. First operand 1118 states and 3582 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 20:00:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:50,845 INFO L93 Difference]: Finished difference Result 1365 states and 4206 transitions. [2021-06-12 20:00:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:50,846 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 24 [2021-06-12 20:00:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:50,847 INFO L225 Difference]: With dead ends: 1365 [2021-06-12 20:00:50,847 INFO L226 Difference]: Without dead ends: 1318 [2021-06-12 20:00:50,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-12 20:00:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1120. [2021-06-12 20:00:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.2055406613047364) internal successors, (3587), 1119 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3587 transitions. [2021-06-12 20:00:50,859 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3587 transitions. Word has length 24 [2021-06-12 20:00:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:50,859 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3587 transitions. [2021-06-12 20:00:50,859 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 20:00:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3587 transitions. [2021-06-12 20:00:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:50,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:50,861 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:51,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-06-12 20:00:51,061 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash -641009284, now seen corresponding path program 251 times [2021-06-12 20:00:51,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:51,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831637421] [2021-06-12 20:00:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:51,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831637421] [2021-06-12 20:00:51,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831637421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676554956] [2021-06-12 20:00:51,191 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 20:00:51,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:51,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:51,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,325 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 18 treesize of output 14 [2021-06-12 20:00:51,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,329 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 17 treesize of output 13 [2021-06-12 20:00:51,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,332 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 18 treesize of output 14 [2021-06-12 20:00:51,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:51,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:00:51,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,633 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 19 treesize of output 15 [2021-06-12 20:00:51,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,663 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 11 treesize of output 7 [2021-06-12 20:00:51,664 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:51,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,703 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 20:00:51,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:51,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:51,734 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 11 treesize of output 7 [2021-06-12 20:00:51,735 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:51,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:51,759 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 20:00:51,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-12 20:00:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:51,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676554956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:51,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:00:51,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618339242] [2021-06-12 20:00:51,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:51,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:51,814 INFO L87 Difference]: Start difference. First operand 1120 states and 3587 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 20:00:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:52,161 INFO L93 Difference]: Finished difference Result 1476 states and 4556 transitions. [2021-06-12 20:00:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:52,162 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 24 [2021-06-12 20:00:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:52,163 INFO L225 Difference]: With dead ends: 1476 [2021-06-12 20:00:52,163 INFO L226 Difference]: Without dead ends: 1418 [2021-06-12 20:00:52,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-12 20:00:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1119. [2021-06-12 20:00:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.204830053667263) internal successors, (3583), 1118 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3583 transitions. [2021-06-12 20:00:52,176 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3583 transitions. Word has length 24 [2021-06-12 20:00:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:52,176 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3583 transitions. [2021-06-12 20:00:52,176 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 20:00:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3583 transitions. [2021-06-12 20:00:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:52,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:52,177 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:52,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-06-12 20:00:52,378 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash -814901454, now seen corresponding path program 252 times [2021-06-12 20:00:52,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:52,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057209020] [2021-06-12 20:00:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:52,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:52,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057209020] [2021-06-12 20:00:52,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057209020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992830310] [2021-06-12 20:00:52,543 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 20:00:52,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:52,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,677 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 17 treesize of output 13 [2021-06-12 20:00:52,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,680 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 18 treesize of output 14 [2021-06-12 20:00:52,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,708 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 2 xjuncts. [2021-06-12 20:00:52,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-06-12 20:00:52,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,799 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 20 treesize of output 16 [2021-06-12 20:00:52,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,802 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 20 treesize of output 16 [2021-06-12 20:00:52,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,870 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 19 treesize of output 15 [2021-06-12 20:00:52,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,874 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 20:00:52,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:00:52,936 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:52,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,939 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 11 treesize of output 7 [2021-06-12 20:00:52,940 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:53,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,005 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 12 treesize of output 8 [2021-06-12 20:00:53,006 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:53,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:53,009 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 12 treesize of output 8 [2021-06-12 20:00:53,011 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:53,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:53,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:53,062 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:181, output treesize:69 [2021-06-12 20:00:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:53,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992830310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:53,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:53,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:53,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564027631] [2021-06-12 20:00:53,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:53,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:53,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:53,206 INFO L87 Difference]: Start difference. First operand 1119 states and 3583 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:53,841 INFO L93 Difference]: Finished difference Result 1607 states and 4876 transitions. [2021-06-12 20:00:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:53,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:53,843 INFO L225 Difference]: With dead ends: 1607 [2021-06-12 20:00:53,843 INFO L226 Difference]: Without dead ends: 1514 [2021-06-12 20:00:53,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-12 20:00:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1130. [2021-06-12 20:00:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2152347209920284) internal successors, (3630), 1129 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3630 transitions. [2021-06-12 20:00:53,856 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3630 transitions. Word has length 24 [2021-06-12 20:00:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:53,856 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3630 transitions. [2021-06-12 20:00:53,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3630 transitions. [2021-06-12 20:00:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:53,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:53,857 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-12 20:00:54,057 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -633221908, now seen corresponding path program 253 times [2021-06-12 20:00:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:54,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671817736] [2021-06-12 20:00:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:54,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:54,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671817736] [2021-06-12 20:00:54,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671817736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950749908] [2021-06-12 20:00:54,202 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 20:00:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:54,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,331 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 17 treesize of output 13 [2021-06-12 20:00:54,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,334 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 17 treesize of output 13 [2021-06-12 20:00:54,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,366 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 20:00:54,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-12 20:00:54,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,574 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 27 treesize of output 21 [2021-06-12 20:00:54,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,585 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 22 treesize of output 14 [2021-06-12 20:00:54,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,594 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 20:00:54,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-06-12 20:00:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:00:54,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950749908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:54,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:54,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421989553] [2021-06-12 20:00:54,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:54,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:54,627 INFO L87 Difference]: Start difference. First operand 1130 states and 3630 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:55,010 INFO L93 Difference]: Finished difference Result 1318 states and 4157 transitions. [2021-06-12 20:00:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:55,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:55,012 INFO L225 Difference]: With dead ends: 1318 [2021-06-12 20:00:55,012 INFO L226 Difference]: Without dead ends: 1299 [2021-06-12 20:00:55,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-12 20:00:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1128. [2021-06-12 20:00:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 3.21206743566992) internal successors, (3620), 1127 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3620 transitions. [2021-06-12 20:00:55,023 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3620 transitions. Word has length 24 [2021-06-12 20:00:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:55,023 INFO L482 AbstractCegarLoop]: Abstraction has 1128 states and 3620 transitions. [2021-06-12 20:00:55,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3620 transitions. [2021-06-12 20:00:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:55,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:55,024 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:55,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:55,225 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1548955540, now seen corresponding path program 254 times [2021-06-12 20:00:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:55,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031795324] [2021-06-12 20:00:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:55,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:55,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031795324] [2021-06-12 20:00:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031795324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636173472] [2021-06-12 20:00:55,362 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 20:00:55,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:55,441 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 24 treesize of output 18 [2021-06-12 20:00:55,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-06-12 20:00:55,464 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 28 treesize of output 22 [2021-06-12 20:00:55,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,469 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:00:55,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:13 [2021-06-12 20:00:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:55,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636173472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:55,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:55,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464861721] [2021-06-12 20:00:55,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:55,524 INFO L87 Difference]: Start difference. First operand 1128 states and 3620 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 20:00:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:55,814 INFO L93 Difference]: Finished difference Result 1328 states and 4176 transitions. [2021-06-12 20:00:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:55,815 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 24 [2021-06-12 20:00:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:55,816 INFO L225 Difference]: With dead ends: 1328 [2021-06-12 20:00:55,816 INFO L226 Difference]: Without dead ends: 1297 [2021-06-12 20:00:55,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-12 20:00:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1109. [2021-06-12 20:00:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.1958483754512637) internal successors, (3541), 1108 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 3541 transitions. [2021-06-12 20:00:55,828 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 3541 transitions. Word has length 24 [2021-06-12 20:00:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:55,828 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 3541 transitions. [2021-06-12 20:00:55,828 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 20:00:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 3541 transitions. [2021-06-12 20:00:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:55,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:55,829 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:56,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2027 [2021-06-12 20:00:56,030 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash -311546860, now seen corresponding path program 255 times [2021-06-12 20:00:56,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:56,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683081778] [2021-06-12 20:00:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:56,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:56,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683081778] [2021-06-12 20:00:56,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683081778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709526159] [2021-06-12 20:00:56,157 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 20:00:56,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:00:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:56,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:56,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:56,345 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 20:00:56,345 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:00:56,402 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:00:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:56,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,409 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 20:00:56,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:56,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:56,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,436 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 12 treesize of output 8 [2021-06-12 20:00:56,437 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:56,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:56,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:00:56,441 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:56,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:56,464 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 20:00:56,464 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-06-12 20:00:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:56,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709526159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:56,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:56,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591351715] [2021-06-12 20:00:56,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:56,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:56,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:56,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:56,541 INFO L87 Difference]: Start difference. First operand 1109 states and 3541 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 20:00:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:56,855 INFO L93 Difference]: Finished difference Result 1368 states and 4265 transitions. [2021-06-12 20:00:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:56,856 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 24 [2021-06-12 20:00:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:56,857 INFO L225 Difference]: With dead ends: 1368 [2021-06-12 20:00:56,857 INFO L226 Difference]: Without dead ends: 1306 [2021-06-12 20:00:56,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-12 20:00:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1102. [2021-06-12 20:00:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.1970935513169847) internal successors, (3520), 1101 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3520 transitions. [2021-06-12 20:00:56,869 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3520 transitions. Word has length 24 [2021-06-12 20:00:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:56,869 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3520 transitions. [2021-06-12 20:00:56,869 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 20:00:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3520 transitions. [2021-06-12 20:00:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:56,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:56,870 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:57,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2028,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:57,070 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:57,071 INFO L82 PathProgramCache]: Analyzing trace with hash 319657642, now seen corresponding path program 256 times [2021-06-12 20:00:57,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:57,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002391086] [2021-06-12 20:00:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:57,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002391086] [2021-06-12 20:00:57,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002391086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956508901] [2021-06-12 20:00:57,237 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 20:00:57,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:57,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:00:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:57,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:57,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,367 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 20:00:57,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:57,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,425 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 18 treesize of output 14 [2021-06-12 20:00:57,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:57,474 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:00:57,578 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 20:00:57,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,582 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 19 treesize of output 15 [2021-06-12 20:00:57,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,587 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 20 treesize of output 16 [2021-06-12 20:00:57,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,592 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 20:00:57,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,596 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 20 treesize of output 16 [2021-06-12 20:00:57,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,601 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 19 treesize of output 15 [2021-06-12 20:00:57,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,606 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 20 treesize of output 16 [2021-06-12 20:00:57,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:57,611 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,614 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 19 treesize of output 15 [2021-06-12 20:00:57,615 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,779 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-12 20:00:57,780 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-06-12 20:00:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,783 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 12 treesize of output 8 [2021-06-12 20:00:57,785 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,788 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 13 treesize of output 9 [2021-06-12 20:00:57,789 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:57,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,792 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 12 treesize of output 8 [2021-06-12 20:00:57,793 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:57,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:00:57,868 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-06-12 20:00:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:58,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956508901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:58,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:58,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659230168] [2021-06-12 20:00:58,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:58,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:58,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:58,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:58,009 INFO L87 Difference]: Start difference. First operand 1102 states and 3520 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:58,299 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:00:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:58,863 INFO L93 Difference]: Finished difference Result 1623 states and 5035 transitions. [2021-06-12 20:00:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:00:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:58,865 INFO L225 Difference]: With dead ends: 1623 [2021-06-12 20:00:58,865 INFO L226 Difference]: Without dead ends: 1543 [2021-06-12 20:00:58,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-12 20:00:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1131. [2021-06-12 20:00:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.217699115044248) internal successors, (3636), 1130 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3636 transitions. [2021-06-12 20:00:58,879 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3636 transitions. Word has length 24 [2021-06-12 20:00:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:58,879 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3636 transitions. [2021-06-12 20:00:58,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:00:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3636 transitions. [2021-06-12 20:00:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:00:58,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:58,880 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:59,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2036 [2021-06-12 20:00:59,082 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2024222604, now seen corresponding path program 257 times [2021-06-12 20:00:59,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:59,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733479029] [2021-06-12 20:00:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:59,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:59,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733479029] [2021-06-12 20:00:59,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733479029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459002000] [2021-06-12 20:00:59,245 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 20:00:59,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:59,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:59,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,367 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 18 treesize of output 14 [2021-06-12 20:00:59,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,371 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 18 treesize of output 14 [2021-06-12 20:00:59,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,425 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 17 treesize of output 13 [2021-06-12 20:00:59,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,428 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 20:00:59,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:00:59,477 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:00:59,566 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 20:00:59,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:00:59,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,575 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 20 treesize of output 16 [2021-06-12 20:00:59,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,579 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 20 treesize of output 16 [2021-06-12 20:00:59,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:59,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,588 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 19 treesize of output 15 [2021-06-12 20:00:59,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,593 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 19 treesize of output 15 [2021-06-12 20:00:59,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:00:59,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,601 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 19 treesize of output 15 [2021-06-12 20:00:59,601 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,764 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-12 20:00:59,764 INFO L628 ElimStorePlain]: treesize reduction 141, result has 55.0 percent of original size [2021-06-12 20:00:59,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,768 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 13 treesize of output 9 [2021-06-12 20:00:59,769 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:59,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,773 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 12 treesize of output 8 [2021-06-12 20:00:59,774 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:59,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,778 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 13 treesize of output 9 [2021-06-12 20:00:59,779 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:59,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,782 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 12 treesize of output 8 [2021-06-12 20:00:59,783 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:00:59,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:00:59,842 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:361, output treesize:81 [2021-06-12 20:00:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:00:59,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459002000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:59,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:59,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473742421] [2021-06-12 20:00:59,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:59,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:59,967 INFO L87 Difference]: Start difference. First operand 1131 states and 3636 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:00,250 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:01:00,465 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-12 20:01:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:01,026 INFO L93 Difference]: Finished difference Result 1610 states and 4896 transitions. [2021-06-12 20:01:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:01:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:01,028 INFO L225 Difference]: With dead ends: 1610 [2021-06-12 20:01:01,028 INFO L226 Difference]: Without dead ends: 1533 [2021-06-12 20:01:01,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1014.0ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-12 20:01:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1129. [2021-06-12 20:01:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.2189716312056738) internal successors, (3631), 1128 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 3631 transitions. [2021-06-12 20:01:01,042 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 3631 transitions. Word has length 24 [2021-06-12 20:01:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:01,042 INFO L482 AbstractCegarLoop]: Abstraction has 1129 states and 3631 transitions. [2021-06-12 20:01:01,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 3631 transitions. [2021-06-12 20:01:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:01,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:01,043 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:01,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:01,253 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1093862012, now seen corresponding path program 258 times [2021-06-12 20:01:01,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:01,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184732391] [2021-06-12 20:01:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:01,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:01,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184732391] [2021-06-12 20:01:01,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184732391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:01,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877675104] [2021-06-12 20:01:01,416 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 20:01:01,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,543 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 18 treesize of output 14 [2021-06-12 20:01:01,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,564 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 17 treesize of output 13 [2021-06-12 20:01:01,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:01,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 20:01:01,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,648 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 19 treesize of output 15 [2021-06-12 20:01:01,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,651 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 19 treesize of output 15 [2021-06-12 20:01:01,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:01,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,681 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 11 treesize of output 7 [2021-06-12 20:01:01,682 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:01,684 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 11 treesize of output 7 [2021-06-12 20:01:01,685 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:01,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:01,709 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 20:01:01,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-12 20:01:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:01,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877675104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:01,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:01,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490432740] [2021-06-12 20:01:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:01,779 INFO L87 Difference]: Start difference. First operand 1129 states and 3631 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:02,553 INFO L93 Difference]: Finished difference Result 1462 states and 4607 transitions. [2021-06-12 20:01:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:01:02,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:02,555 INFO L225 Difference]: With dead ends: 1462 [2021-06-12 20:01:02,555 INFO L226 Difference]: Without dead ends: 1403 [2021-06-12 20:01:02,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 752.9ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-12 20:01:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1119. [2021-06-12 20:01:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.2093023255813953) internal successors, (3588), 1118 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3588 transitions. [2021-06-12 20:01:02,567 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3588 transitions. Word has length 24 [2021-06-12 20:01:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:02,567 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3588 transitions. [2021-06-12 20:01:02,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3588 transitions. [2021-06-12 20:01:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:02,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:02,569 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:02,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2051 [2021-06-12 20:01:02,769 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1660347728, now seen corresponding path program 259 times [2021-06-12 20:01:02,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:02,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695836022] [2021-06-12 20:01:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:02,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:02,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695836022] [2021-06-12 20:01:02,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695836022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658457746] [2021-06-12 20:01:02,910 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 20:01:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:02,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:02,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,056 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 25 treesize of output 19 [2021-06-12 20:01:03,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,059 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 26 treesize of output 20 [2021-06-12 20:01:03,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,087 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 20:01:03,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-06-12 20:01:03,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,204 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 27 treesize of output 21 [2021-06-12 20:01:03,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,215 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 22 treesize of output 14 [2021-06-12 20:01:03,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,223 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 20:01:03,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-06-12 20:01:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:03,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658457746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:03,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:03,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75094032] [2021-06-12 20:01:03,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:03,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:03,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:03,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:03,258 INFO L87 Difference]: Start difference. First operand 1119 states and 3588 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:03,515 INFO L93 Difference]: Finished difference Result 1209 states and 3813 transitions. [2021-06-12 20:01:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:03,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:03,517 INFO L225 Difference]: With dead ends: 1209 [2021-06-12 20:01:03,517 INFO L226 Difference]: Without dead ends: 1178 [2021-06-12 20:01:03,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-12 20:01:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1125. [2021-06-12 20:01:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.2072953736654806) internal successors, (3605), 1124 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3605 transitions. [2021-06-12 20:01:03,529 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3605 transitions. Word has length 24 [2021-06-12 20:01:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:03,529 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 3605 transitions. [2021-06-12 20:01:03,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3605 transitions. [2021-06-12 20:01:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:03,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:03,530 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:03,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2057 [2021-06-12 20:01:03,731 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash 896647752, now seen corresponding path program 260 times [2021-06-12 20:01:03,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:03,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120605303] [2021-06-12 20:01:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:03,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:03,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120605303] [2021-06-12 20:01:03,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120605303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:03,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560713114] [2021-06-12 20:01:03,906 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 20:01:03,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:03,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:03,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,072 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 20:01:04,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:04,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,104 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 20:01:04,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 20:01:04,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,180 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 20 treesize of output 16 [2021-06-12 20:01:04,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,207 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 19 treesize of output 15 [2021-06-12 20:01:04,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,232 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 7 [2021-06-12 20:01:04,233 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:04,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,257 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 12 treesize of output 8 [2021-06-12 20:01:04,258 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:04,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,279 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 20:01:04,279 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-12 20:01:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:04,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560713114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:04,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:04,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13085685] [2021-06-12 20:01:04,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:04,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:04,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:04,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:04,343 INFO L87 Difference]: Start difference. First operand 1125 states and 3605 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:04,579 INFO L93 Difference]: Finished difference Result 1241 states and 3893 transitions. [2021-06-12 20:01:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:04,581 INFO L225 Difference]: With dead ends: 1241 [2021-06-12 20:01:04,581 INFO L226 Difference]: Without dead ends: 1206 [2021-06-12 20:01:04,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-12 20:01:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1123. [2021-06-12 20:01:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 3.2085561497326203) internal successors, (3600), 1122 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3600 transitions. [2021-06-12 20:01:04,592 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3600 transitions. Word has length 24 [2021-06-12 20:01:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:04,592 INFO L482 AbstractCegarLoop]: Abstraction has 1123 states and 3600 transitions. [2021-06-12 20:01:04,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3600 transitions. [2021-06-12 20:01:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:04,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:04,593 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:04,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2064,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:04,794 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash 359154896, now seen corresponding path program 261 times [2021-06-12 20:01:04,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:04,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323030260] [2021-06-12 20:01:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:04,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323030260] [2021-06-12 20:01:04,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323030260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126423456] [2021-06-12 20:01:04,968 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 20:01:04,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:04,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:04,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,086 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 19 treesize of output 15 [2021-06-12 20:01:05,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,089 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 19 treesize of output 15 [2021-06-12 20:01:05,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,117 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 20:01:05,118 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:69 [2021-06-12 20:01:05,189 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:01:05,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:05,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,196 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 20 treesize of output 16 [2021-06-12 20:01:05,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:05,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,203 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 20 treesize of output 16 [2021-06-12 20:01:05,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,258 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 13 treesize of output 9 [2021-06-12 20:01:05,260 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,263 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 11 treesize of output 7 [2021-06-12 20:01:05,264 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:05,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,267 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 13 treesize of output 9 [2021-06-12 20:01:05,268 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,271 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 7 [2021-06-12 20:01:05,272 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:05,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,323 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 20:01:05,323 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-06-12 20:01:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:05,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126423456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:05,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:05,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:05,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493681569] [2021-06-12 20:01:05,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:05,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:05,420 INFO L87 Difference]: Start difference. First operand 1123 states and 3600 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:05,897 INFO L93 Difference]: Finished difference Result 1279 states and 4026 transitions. [2021-06-12 20:01:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:05,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:05,899 INFO L225 Difference]: With dead ends: 1279 [2021-06-12 20:01:05,899 INFO L226 Difference]: Without dead ends: 1209 [2021-06-12 20:01:05,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-12 20:01:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1121. [2021-06-12 20:01:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2098214285714284) internal successors, (3595), 1120 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3595 transitions. [2021-06-12 20:01:05,910 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3595 transitions. Word has length 24 [2021-06-12 20:01:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:05,910 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3595 transitions. [2021-06-12 20:01:05,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3595 transitions. [2021-06-12 20:01:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:05,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:05,911 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:06,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2072,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:06,112 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1745917266, now seen corresponding path program 262 times [2021-06-12 20:01:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:06,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704880565] [2021-06-12 20:01:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:06,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:06,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704880565] [2021-06-12 20:01:06,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704880565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687723236] [2021-06-12 20:01:06,270 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 20:01:06,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:06,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:06,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,379 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 20:01:06,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,383 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 18 treesize of output 14 [2021-06-12 20:01:06,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,387 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 17 treesize of output 13 [2021-06-12 20:01:06,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,391 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 18 treesize of output 14 [2021-06-12 20:01:06,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:06,458 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:01:06,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,705 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 20:01:06,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,716 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 11 treesize of output 7 [2021-06-12 20:01:06,718 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:06,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,726 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 20:01:06,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-12 20:01:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:06,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687723236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:06,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:06,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950328894] [2021-06-12 20:01:06,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:06,763 INFO L87 Difference]: Start difference. First operand 1121 states and 3595 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:07,213 INFO L93 Difference]: Finished difference Result 1259 states and 3950 transitions. [2021-06-12 20:01:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:07,215 INFO L225 Difference]: With dead ends: 1259 [2021-06-12 20:01:07,215 INFO L226 Difference]: Without dead ends: 1228 [2021-06-12 20:01:07,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-12 20:01:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1136. [2021-06-12 20:01:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2096916299559473) internal successors, (3643), 1135 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3643 transitions. [2021-06-12 20:01:07,227 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3643 transitions. Word has length 24 [2021-06-12 20:01:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:07,227 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3643 transitions. [2021-06-12 20:01:07,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3643 transitions. [2021-06-12 20:01:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:07,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:07,228 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:07,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:07,428 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash 7945450, now seen corresponding path program 263 times [2021-06-12 20:01:07,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:07,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693643798] [2021-06-12 20:01:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:07,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:07,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693643798] [2021-06-12 20:01:07,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693643798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:07,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807272580] [2021-06-12 20:01:07,629 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 20:01:07,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:07,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,742 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 17 treesize of output 13 [2021-06-12 20:01:07,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,746 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 18 treesize of output 14 [2021-06-12 20:01:07,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,750 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 17 treesize of output 13 [2021-06-12 20:01:07,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:07,753 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 18 treesize of output 14 [2021-06-12 20:01:07,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:07,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:07,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:07,822 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:01:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,018 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 20 treesize of output 16 [2021-06-12 20:01:08,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,046 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 12 treesize of output 8 [2021-06-12 20:01:08,047 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:08,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,073 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 20:01:08,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:01:08,102 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:08,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:08,123 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 20:01:08,124 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-12 20:01:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:08,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807272580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:08,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:08,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228079100] [2021-06-12 20:01:08,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:08,190 INFO L87 Difference]: Start difference. First operand 1136 states and 3643 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:08,786 INFO L93 Difference]: Finished difference Result 1438 states and 4420 transitions. [2021-06-12 20:01:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:08,788 INFO L225 Difference]: With dead ends: 1438 [2021-06-12 20:01:08,788 INFO L226 Difference]: Without dead ends: 1376 [2021-06-12 20:01:08,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-06-12 20:01:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1134. [2021-06-12 20:01:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2109443954104147) internal successors, (3638), 1133 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3638 transitions. [2021-06-12 20:01:08,801 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3638 transitions. Word has length 24 [2021-06-12 20:01:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:08,801 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3638 transitions. [2021-06-12 20:01:08,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3638 transitions. [2021-06-12 20:01:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:08,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:08,802 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:09,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2093 [2021-06-12 20:01:09,003 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash -485808336, now seen corresponding path program 264 times [2021-06-12 20:01:09,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:09,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733607152] [2021-06-12 20:01:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:09,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733607152] [2021-06-12 20:01:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733607152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069234184] [2021-06-12 20:01:09,153 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 20:01:09,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:09,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,260 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 18 treesize of output 14 [2021-06-12 20:01:09,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,264 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 17 treesize of output 13 [2021-06-12 20:01:09,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,268 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 18 treesize of output 14 [2021-06-12 20:01:09,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,272 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 17 treesize of output 13 [2021-06-12 20:01:09,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:09,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:01:09,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,530 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 20:01:09,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,542 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 11 treesize of output 7 [2021-06-12 20:01:09,543 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:09,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,553 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 20:01:09,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-12 20:01:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:09,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069234184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:09,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:09,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191292823] [2021-06-12 20:01:09,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:09,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:09,581 INFO L87 Difference]: Start difference. First operand 1134 states and 3638 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 20:01:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:09,835 INFO L93 Difference]: Finished difference Result 1255 states and 3940 transitions. [2021-06-12 20:01:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:09,836 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 24 [2021-06-12 20:01:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:09,837 INFO L225 Difference]: With dead ends: 1255 [2021-06-12 20:01:09,837 INFO L226 Difference]: Without dead ends: 1224 [2021-06-12 20:01:09,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-12 20:01:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1129. [2021-06-12 20:01:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.2154255319148937) internal successors, (3627), 1128 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 3627 transitions. [2021-06-12 20:01:09,849 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 3627 transitions. Word has length 24 [2021-06-12 20:01:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:09,849 INFO L482 AbstractCegarLoop]: Abstraction has 1129 states and 3627 transitions. [2021-06-12 20:01:09,849 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 20:01:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 3627 transitions. [2021-06-12 20:01:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:09,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:09,850 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:10,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2103 [2021-06-12 20:01:10,050 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1806395054, now seen corresponding path program 265 times [2021-06-12 20:01:10,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:10,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597263196] [2021-06-12 20:01:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:10,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597263196] [2021-06-12 20:01:10,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597263196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404927511] [2021-06-12 20:01:10,159 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 20:01:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:10,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,232 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 20:01:10,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,235 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 20:01:10,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,238 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 17 treesize of output 13 [2021-06-12 20:01:10,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,240 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 18 treesize of output 14 [2021-06-12 20:01:10,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:10,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-06-12 20:01:10,359 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 19 treesize of output 15 [2021-06-12 20:01:10,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,385 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 19 treesize of output 15 [2021-06-12 20:01:10,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,402 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 11 treesize of output 7 [2021-06-12 20:01:10,403 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:10,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,418 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 11 treesize of output 7 [2021-06-12 20:01:10,419 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:10,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:10,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:61, output treesize:31 [2021-06-12 20:01:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:10,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404927511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:10,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:10,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761557767] [2021-06-12 20:01:10,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:10,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:10,492 INFO L87 Difference]: Start difference. First operand 1129 states and 3627 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:01:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:10,764 INFO L93 Difference]: Finished difference Result 1353 states and 4210 transitions. [2021-06-12 20:01:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 24 [2021-06-12 20:01:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:10,766 INFO L225 Difference]: With dead ends: 1353 [2021-06-12 20:01:10,766 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 20:01:10,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 20:01:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1122. [2021-06-12 20:01:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.210526315789474) internal successors, (3599), 1121 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3599 transitions. [2021-06-12 20:01:10,778 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3599 transitions. Word has length 24 [2021-06-12 20:01:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:10,778 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3599 transitions. [2021-06-12 20:01:10,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:01:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3599 transitions. [2021-06-12 20:01:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:10,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:10,779 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:10,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2110,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:10,980 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1980287224, now seen corresponding path program 266 times [2021-06-12 20:01:10,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:10,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735329701] [2021-06-12 20:01:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:11,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735329701] [2021-06-12 20:01:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735329701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446066784] [2021-06-12 20:01:11,139 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 20:01:11,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,246 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 18 treesize of output 14 [2021-06-12 20:01:11,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,250 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 20:01:11,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,253 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 20:01:11,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,257 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 18 treesize of output 14 [2021-06-12 20:01:11,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:11,325 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:01:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,467 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 20:01:11,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:11,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,596 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 12 treesize of output 8 [2021-06-12 20:01:11,598 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:11,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:11,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:11,724 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:11,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,791 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 11 treesize of output 7 [2021-06-12 20:01:11,792 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:11,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,849 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 19 treesize of output 15 [2021-06-12 20:01:11,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,904 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 7 [2021-06-12 20:01:11,905 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:11,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,961 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 20:01:11,961 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:75 [2021-06-12 20:01:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446066784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:12,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:12,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614632496] [2021-06-12 20:01:12,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:12,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:12,055 INFO L87 Difference]: Start difference. First operand 1122 states and 3599 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 20:01:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:12,403 INFO L93 Difference]: Finished difference Result 1344 states and 4203 transitions. [2021-06-12 20:01:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:12,403 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 24 [2021-06-12 20:01:12,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:12,405 INFO L225 Difference]: With dead ends: 1344 [2021-06-12 20:01:12,405 INFO L226 Difference]: Without dead ends: 1297 [2021-06-12 20:01:12,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:12,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-12 20:01:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1127. [2021-06-12 20:01:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.219360568383659) internal successors, (3625), 1126 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3625 transitions. [2021-06-12 20:01:12,416 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3625 transitions. Word has length 24 [2021-06-12 20:01:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:12,417 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3625 transitions. [2021-06-12 20:01:12,417 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 20:01:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3625 transitions. [2021-06-12 20:01:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:12,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:12,418 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:12,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2116,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:12,618 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1434406536, now seen corresponding path program 267 times [2021-06-12 20:01:12,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:12,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483827506] [2021-06-12 20:01:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:12,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:12,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483827506] [2021-06-12 20:01:12,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483827506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:12,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725917014] [2021-06-12 20:01:12,784 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 20:01:12,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:12,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:12,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:12,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,875 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 18 treesize of output 14 [2021-06-12 20:01:12,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,878 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 17 treesize of output 13 [2021-06-12 20:01:12,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:12,907 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 20:01:12,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 20:01:12,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,976 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 20:01:12,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,979 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 19 treesize of output 15 [2021-06-12 20:01:12,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,055 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 11 treesize of output 7 [2021-06-12 20:01:13,056 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:13,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,059 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 11 treesize of output 7 [2021-06-12 20:01:13,060 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:13,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,133 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 20 treesize of output 16 [2021-06-12 20:01:13,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,137 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 20 treesize of output 16 [2021-06-12 20:01:13,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:13,214 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:13,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,217 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 12 treesize of output 8 [2021-06-12 20:01:13,218 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:13,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:13,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:13,284 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:81 [2021-06-12 20:01:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:13,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725917014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:13,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:13,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543058190] [2021-06-12 20:01:13,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:13,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:13,422 INFO L87 Difference]: Start difference. First operand 1127 states and 3625 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 20:01:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:13,988 INFO L93 Difference]: Finished difference Result 1320 states and 4133 transitions. [2021-06-12 20:01:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:13,988 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 24 [2021-06-12 20:01:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:13,990 INFO L225 Difference]: With dead ends: 1320 [2021-06-12 20:01:13,990 INFO L226 Difference]: Without dead ends: 1279 [2021-06-12 20:01:13,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-12 20:01:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1121. [2021-06-12 20:01:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2098214285714284) internal successors, (3595), 1120 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3595 transitions. [2021-06-12 20:01:14,001 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3595 transitions. Word has length 24 [2021-06-12 20:01:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:14,002 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3595 transitions. [2021-06-12 20:01:14,002 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 20:01:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3595 transitions. [2021-06-12 20:01:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:14,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:14,003 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:14,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2124 [2021-06-12 20:01:14,203 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1146515854, now seen corresponding path program 268 times [2021-06-12 20:01:14,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:14,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764798839] [2021-06-12 20:01:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:14,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:14,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764798839] [2021-06-12 20:01:14,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764798839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010179560] [2021-06-12 20:01:14,351 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 20:01:14,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:14,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:14,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,469 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 20:01:14,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,474 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 19 treesize of output 15 [2021-06-12 20:01:14,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,565 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 19 treesize of output 15 [2021-06-12 20:01:14,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:14,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:14,648 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 20:01:14,832 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:01:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,835 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 19 treesize of output 15 [2021-06-12 20:01:14,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,839 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 20:01:14,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,843 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 20 treesize of output 16 [2021-06-12 20:01:14,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:14,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,936 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.8 percent of original size [2021-06-12 20:01:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,939 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 8 [2021-06-12 20:01:14,940 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:14,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:01:14,944 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:14,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,983 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 20:01:14,983 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-06-12 20:01:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:15,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010179560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:15,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:15,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033033520] [2021-06-12 20:01:15,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:15,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:15,062 INFO L87 Difference]: Start difference. First operand 1121 states and 3595 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 20:01:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:15,356 INFO L93 Difference]: Finished difference Result 1210 states and 3806 transitions. [2021-06-12 20:01:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:15,357 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 24 [2021-06-12 20:01:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:15,358 INFO L225 Difference]: With dead ends: 1210 [2021-06-12 20:01:15,358 INFO L226 Difference]: Without dead ends: 1157 [2021-06-12 20:01:15,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-06-12 20:01:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1124. [2021-06-12 20:01:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.210151380231523) internal successors, (3605), 1123 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3605 transitions. [2021-06-12 20:01:15,369 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3605 transitions. Word has length 24 [2021-06-12 20:01:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:15,369 INFO L482 AbstractCegarLoop]: Abstraction has 1124 states and 3605 transitions. [2021-06-12 20:01:15,369 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 20:01:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3605 transitions. [2021-06-12 20:01:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:15,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:15,370 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:15,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-06-12 20:01:15,570 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1180120976, now seen corresponding path program 269 times [2021-06-12 20:01:15,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:15,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274307130] [2021-06-12 20:01:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:15,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:15,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274307130] [2021-06-12 20:01:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274307130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578372310] [2021-06-12 20:01:15,749 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 20:01:15,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:15,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,853 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 19 treesize of output 15 [2021-06-12 20:01:15,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:15,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,884 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 19 treesize of output 15 [2021-06-12 20:01:15,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:15,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:01:15,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 20:01:15,983 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:01:15,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,986 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 19 treesize of output 15 [2021-06-12 20:01:15,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,990 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 20:01:15,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,994 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 20 treesize of output 16 [2021-06-12 20:01:15,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,998 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 20 treesize of output 16 [2021-06-12 20:01:15,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:16,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,062 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 13 treesize of output 9 [2021-06-12 20:01:16,063 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:16,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,066 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 13 treesize of output 9 [2021-06-12 20:01:16,067 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:16,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,077 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 11 treesize of output 7 [2021-06-12 20:01:16,078 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:16,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,081 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 7 [2021-06-12 20:01:16,083 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:16,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:16,143 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 20:01:16,143 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-12 20:01:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578372310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:16,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:16,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:16,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580190761] [2021-06-12 20:01:16,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:16,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:16,240 INFO L87 Difference]: Start difference. First operand 1124 states and 3605 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 20:01:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:16,609 INFO L93 Difference]: Finished difference Result 1296 states and 4061 transitions. [2021-06-12 20:01:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:16,610 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 24 [2021-06-12 20:01:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:16,611 INFO L225 Difference]: With dead ends: 1296 [2021-06-12 20:01:16,611 INFO L226 Difference]: Without dead ends: 1249 [2021-06-12 20:01:16,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-12 20:01:16,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1129. [2021-06-12 20:01:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.2189716312056738) internal successors, (3631), 1128 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call 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 L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 3631 transitions. [2021-06-12 20:01:16,623 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 3631 transitions. Word has length 24 [2021-06-12 20:01:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:16,623 INFO L482 AbstractCegarLoop]: Abstraction has 1129 states and 3631 transitions. [2021-06-12 20:01:16,623 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 20:01:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 3631 transitions. [2021-06-12 20:01:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:16,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:16,624 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:16,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2147,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:16,824 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash 299847440, now seen corresponding path program 270 times [2021-06-12 20:01:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:16,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932640330] [2021-06-12 20:01:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:16,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932640330] [2021-06-12 20:01:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932640330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20988748] [2021-06-12 20:01:16,951 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 20:01:16,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:16,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:17,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,058 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 20:01:17,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:17,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,140 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 19 treesize of output 15 [2021-06-12 20:01:17,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,145 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 19 treesize of output 15 [2021-06-12 20:01:17,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:17,217 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 20:01:17,356 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 20:01:17,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,361 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 20 treesize of output 16 [2021-06-12 20:01:17,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,366 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 20:01:17,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,370 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 20 treesize of output 16 [2021-06-12 20:01:17,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,375 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 20 treesize of output 16 [2021-06-12 20:01:17,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,380 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 20:01:17,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,385 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 19 treesize of output 15 [2021-06-12 20:01:17,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,390 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 20:01:17,391 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,394 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 20 treesize of output 16 [2021-06-12 20:01:17,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,596 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 20:01:17,596 INFO L628 ElimStorePlain]: treesize reduction 173, result has 53.9 percent of original size [2021-06-12 20:01:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:01:17,601 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,605 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 12 treesize of output 8 [2021-06-12 20:01:17,606 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:17,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,609 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 11 treesize of output 7 [2021-06-12 20:01:17,610 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:17,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:01:17,689 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:111 [2021-06-12 20:01:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:17,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20988748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:17,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:17,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800536064] [2021-06-12 20:01:17,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:17,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:17,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:17,817 INFO L87 Difference]: Start difference. First operand 1129 states and 3631 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 20:01:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:18,252 INFO L93 Difference]: Finished difference Result 1491 states and 4568 transitions. [2021-06-12 20:01:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:18,252 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 24 [2021-06-12 20:01:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:18,254 INFO L225 Difference]: With dead ends: 1491 [2021-06-12 20:01:18,254 INFO L226 Difference]: Without dead ends: 1373 [2021-06-12 20:01:18,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-12 20:01:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1121. [2021-06-12 20:01:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2098214285714284) internal successors, (3595), 1120 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3595 transitions. [2021-06-12 20:01:18,267 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3595 transitions. Word has length 24 [2021-06-12 20:01:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:18,267 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3595 transitions. [2021-06-12 20:01:18,267 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 20:01:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3595 transitions. [2021-06-12 20:01:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:18,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:18,268 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:18,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-06-12 20:01:18,468 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash -925862814, now seen corresponding path program 271 times [2021-06-12 20:01:18,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:18,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117702643] [2021-06-12 20:01:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:18,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:18,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117702643] [2021-06-12 20:01:18,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117702643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:18,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635290392] [2021-06-12 20:01:18,674 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 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 20:01:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,788 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 17 treesize of output 13 [2021-06-12 20:01:18,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,792 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 18 treesize of output 14 [2021-06-12 20:01:18,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,797 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 18 treesize of output 14 [2021-06-12 20:01:18,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,801 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 17 treesize of output 13 [2021-06-12 20:01:18,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:18,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:18,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:01:19,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:19,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:19,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,231 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-12 20:01:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,233 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 11 treesize of output 7 [2021-06-12 20:01:19,234 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:19,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:19,244 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 20:01:19,244 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-12 20:01:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:19,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635290392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:19,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:19,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:19,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902629626] [2021-06-12 20:01:19,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:19,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:19,278 INFO L87 Difference]: Start difference. First operand 1121 states and 3595 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:19,754 INFO L93 Difference]: Finished difference Result 1288 states and 4009 transitions. [2021-06-12 20:01:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:19,756 INFO L225 Difference]: With dead ends: 1288 [2021-06-12 20:01:19,756 INFO L226 Difference]: Without dead ends: 1202 [2021-06-12 20:01:19,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-06-12 20:01:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1139. [2021-06-12 20:01:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 3.210896309314587) internal successors, (3654), 1138 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 3654 transitions. [2021-06-12 20:01:19,767 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 3654 transitions. Word has length 24 [2021-06-12 20:01:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:19,767 INFO L482 AbstractCegarLoop]: Abstraction has 1139 states and 3654 transitions. [2021-06-12 20:01:19,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 3654 transitions. [2021-06-12 20:01:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:19,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:19,768 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:19,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2173,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:19,968 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1631132666, now seen corresponding path program 272 times [2021-06-12 20:01:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:19,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512765513] [2021-06-12 20:01:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:20,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:20,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512765513] [2021-06-12 20:01:20,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512765513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378143640] [2021-06-12 20:01:20,147 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 20:01:20,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:20,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:20,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:20,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,254 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 20:01:20,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,258 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 17 treesize of output 13 [2021-06-12 20:01:20,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,262 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 18 treesize of output 14 [2021-06-12 20:01:20,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,266 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 18 treesize of output 14 [2021-06-12 20:01:20,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:20,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,538 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 20:01:20,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,564 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 11 treesize of output 7 [2021-06-12 20:01:20,565 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:20,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,592 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 20 treesize of output 16 [2021-06-12 20:01:20,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,614 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 12 treesize of output 8 [2021-06-12 20:01:20,615 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:20,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,634 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 20:01:20,634 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-06-12 20:01:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:20,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378143640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769303556] [2021-06-12 20:01:20,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:20,691 INFO L87 Difference]: Start difference. First operand 1139 states and 3654 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 20:01:20,935 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-12 20:01:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:21,070 INFO L93 Difference]: Finished difference Result 1310 states and 4073 transitions. [2021-06-12 20:01:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:21,071 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 24 [2021-06-12 20:01:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:21,072 INFO L225 Difference]: With dead ends: 1310 [2021-06-12 20:01:21,072 INFO L226 Difference]: Without dead ends: 1263 [2021-06-12 20:01:21,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-12 20:01:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1133. [2021-06-12 20:01:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.214664310954064) internal successors, (3639), 1132 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3639 transitions. [2021-06-12 20:01:21,084 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3639 transitions. Word has length 24 [2021-06-12 20:01:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:21,084 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 3639 transitions. [2021-06-12 20:01:21,084 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 20:01:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3639 transitions. [2021-06-12 20:01:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:21,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:21,085 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:21,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2180 [2021-06-12 20:01:21,286 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1850428642, now seen corresponding path program 273 times [2021-06-12 20:01:21,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:21,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507734545] [2021-06-12 20:01:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:21,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:21,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507734545] [2021-06-12 20:01:21,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507734545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161967013] [2021-06-12 20:01:21,441 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 20:01:21,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:21,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:21,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:21,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,557 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 17 treesize of output 13 [2021-06-12 20:01:21,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:21,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:21,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:21,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:21,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,885 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 19 treesize of output 15 [2021-06-12 20:01:21,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:21,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,895 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 11 treesize of output 7 [2021-06-12 20:01:21,896 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:21,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:21,903 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 20:01:21,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-06-12 20:01:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:21,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161967013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:21,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:21,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607825958] [2021-06-12 20:01:21,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:21,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:21,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:21,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:21,938 INFO L87 Difference]: Start difference. First operand 1133 states and 3639 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:22,331 INFO L93 Difference]: Finished difference Result 1347 states and 4212 transitions. [2021-06-12 20:01:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:22,333 INFO L225 Difference]: With dead ends: 1347 [2021-06-12 20:01:22,333 INFO L226 Difference]: Without dead ends: 1309 [2021-06-12 20:01:22,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-06-12 20:01:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1137. [2021-06-12 20:01:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.2174295774647885) internal successors, (3655), 1136 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3655 transitions. [2021-06-12 20:01:22,350 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3655 transitions. Word has length 24 [2021-06-12 20:01:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:22,350 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3655 transitions. [2021-06-12 20:01:22,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3655 transitions. [2021-06-12 20:01:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:22,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:22,351 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:22,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2190,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:22,552 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:22,552 INFO L82 PathProgramCache]: Analyzing trace with hash -183207838, now seen corresponding path program 274 times [2021-06-12 20:01:22,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:22,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510532732] [2021-06-12 20:01:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:22,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510532732] [2021-06-12 20:01:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510532732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549854423] [2021-06-12 20:01:22,699 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 20:01:22,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:22,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:22,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:22,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,807 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 18 treesize of output 14 [2021-06-12 20:01:22,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,810 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 17 treesize of output 13 [2021-06-12 20:01:22,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:22,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,818 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 20:01:22,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:22,876 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:23,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:23,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,145 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 7 [2021-06-12 20:01:23,146 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:23,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,174 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 20:01:23,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:23,202 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:23,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:23,238 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 20:01:23,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:31 [2021-06-12 20:01:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549854423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:23,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:23,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244124774] [2021-06-12 20:01:23,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:23,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:23,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:23,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:23,289 INFO L87 Difference]: Start difference. First operand 1137 states and 3655 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 20:01:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:23,596 INFO L93 Difference]: Finished difference Result 1368 states and 4300 transitions. [2021-06-12 20:01:23,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:23,596 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 24 [2021-06-12 20:01:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:23,598 INFO L225 Difference]: With dead ends: 1368 [2021-06-12 20:01:23,598 INFO L226 Difference]: Without dead ends: 1310 [2021-06-12 20:01:23,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-12 20:01:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1133. [2021-06-12 20:01:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.214664310954064) internal successors, (3639), 1132 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3639 transitions. [2021-06-12 20:01:23,609 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3639 transitions. Word has length 24 [2021-06-12 20:01:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:23,609 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 3639 transitions. [2021-06-12 20:01:23,609 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 20:01:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3639 transitions. [2021-06-12 20:01:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:23,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:23,611 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:23,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2197,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:23,811 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -357100008, now seen corresponding path program 275 times [2021-06-12 20:01:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138191864] [2021-06-12 20:01:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:23,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:23,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138191864] [2021-06-12 20:01:23,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138191864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851994267] [2021-06-12 20:01:23,987 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 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 20:01:24,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:24,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:24,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:24,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,103 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 17 treesize of output 13 [2021-06-12 20:01:24,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,107 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 18 treesize of output 14 [2021-06-12 20:01:24,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,111 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 18 treesize of output 14 [2021-06-12 20:01:24,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:24,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:24,174 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:24,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,296 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 20 treesize of output 16 [2021-06-12 20:01:24,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,359 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 12 treesize of output 8 [2021-06-12 20:01:24,360 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:24,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,425 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 20:01:24,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,486 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 20:01:24,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,547 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 11 treesize of output 7 [2021-06-12 20:01:24,548 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:24,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,604 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 19 treesize of output 15 [2021-06-12 20:01:24,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:24,676 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:24,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,740 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 11 treesize of output 7 [2021-06-12 20:01:24,741 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:24,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:24,801 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 20:01:24,801 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:181, output treesize:69 [2021-06-12 20:01:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:24,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851994267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:24,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:24,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146524276] [2021-06-12 20:01:24,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:24,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:24,917 INFO L87 Difference]: Start difference. First operand 1133 states and 3639 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:25,544 INFO L93 Difference]: Finished difference Result 1566 states and 4840 transitions. [2021-06-12 20:01:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:01:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:25,546 INFO L225 Difference]: With dead ends: 1566 [2021-06-12 20:01:25,546 INFO L226 Difference]: Without dead ends: 1500 [2021-06-12 20:01:25,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-12 20:01:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1136. [2021-06-12 20:01:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2149779735682817) internal successors, (3649), 1135 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3649 transitions. [2021-06-12 20:01:25,560 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3649 transitions. Word has length 24 [2021-06-12 20:01:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:25,560 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3649 transitions. [2021-06-12 20:01:25,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3649 transitions. [2021-06-12 20:01:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:25,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:25,561 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:25,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-06-12 20:01:25,762 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1593987042, now seen corresponding path program 276 times [2021-06-12 20:01:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:25,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307786809] [2021-06-12 20:01:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:25,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:25,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307786809] [2021-06-12 20:01:25,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307786809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92343417] [2021-06-12 20:01:25,966 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 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 20:01:26,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:26,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:26,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:26,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,093 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 17 treesize of output 13 [2021-06-12 20:01:26,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,097 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 17 treesize of output 13 [2021-06-12 20:01:26,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,101 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 18 treesize of output 14 [2021-06-12 20:01:26,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,104 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 18 treesize of output 14 [2021-06-12 20:01:26,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:26,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,298 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 19 treesize of output 15 [2021-06-12 20:01:26,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,304 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 20:01:26,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,538 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-06-12 20:01:26,538 INFO L628 ElimStorePlain]: treesize reduction 170, result has 56.1 percent of original size [2021-06-12 20:01:26,543 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 20:01:26,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1041 vanished before elimination [2021-06-12 20:01:26,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,643 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 11 treesize of output 7 [2021-06-12 20:01:26,644 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:26,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,732 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 20:01:26,733 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,737 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 20 treesize of output 16 [2021-06-12 20:01:26,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,817 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 13 treesize of output 9 [2021-06-12 20:01:26,819 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:26,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,895 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 20:01:26,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:26,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,969 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 12 treesize of output 8 [2021-06-12 20:01:26,970 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:27,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:01:27,044 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:401, output treesize:96 [2021-06-12 20:01:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92343417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:27,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692000860] [2021-06-12 20:01:27,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:27,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:27,185 INFO L87 Difference]: Start difference. First operand 1136 states and 3649 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:27,855 INFO L93 Difference]: Finished difference Result 1530 states and 4745 transitions. [2021-06-12 20:01:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:01:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:27,857 INFO L225 Difference]: With dead ends: 1530 [2021-06-12 20:01:27,857 INFO L226 Difference]: Without dead ends: 1457 [2021-06-12 20:01:27,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-12 20:01:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1138. [2021-06-12 20:01:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.22339489885664) internal successors, (3665), 1137 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3665 transitions. [2021-06-12 20:01:27,870 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3665 transitions. Word has length 24 [2021-06-12 20:01:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:27,870 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3665 transitions. [2021-06-12 20:01:27,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3665 transitions. [2021-06-12 20:01:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:27,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:27,871 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:28,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2213 [2021-06-12 20:01:28,071 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1091154094, now seen corresponding path program 277 times [2021-06-12 20:01:28,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:28,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497151538] [2021-06-12 20:01:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:28,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:28,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497151538] [2021-06-12 20:01:28,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497151538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:28,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017350614] [2021-06-12 20:01:28,211 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 20:01:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:28,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,330 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 17 treesize of output 13 [2021-06-12 20:01:28,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,334 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 17 treesize of output 13 [2021-06-12 20:01:28,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,366 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 20:01:28,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-12 20:01:28,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,438 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 20:01:28,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,473 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 7 [2021-06-12 20:01:28,474 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:28,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,504 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 19 treesize of output 15 [2021-06-12 20:01:28,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,532 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 11 treesize of output 7 [2021-06-12 20:01:28,533 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:28,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:28,557 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 20:01:28,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:31 [2021-06-12 20:01:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:28,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017350614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:28,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:28,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:28,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658037764] [2021-06-12 20:01:28,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:28,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:28,633 INFO L87 Difference]: Start difference. First operand 1138 states and 3665 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:28,965 INFO L93 Difference]: Finished difference Result 1337 states and 4217 transitions. [2021-06-12 20:01:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:28,967 INFO L225 Difference]: With dead ends: 1337 [2021-06-12 20:01:28,967 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 20:01:28,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 20:01:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1131. [2021-06-12 20:01:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.2106194690265486) internal successors, (3628), 1130 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3628 transitions. [2021-06-12 20:01:28,980 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3628 transitions. Word has length 24 [2021-06-12 20:01:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:28,980 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3628 transitions. [2021-06-12 20:01:28,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3628 transitions. [2021-06-12 20:01:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:28,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:28,982 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:29,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2221 [2021-06-12 20:01:29,183 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 146254586, now seen corresponding path program 278 times [2021-06-12 20:01:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:29,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162070088] [2021-06-12 20:01:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:29,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162070088] [2021-06-12 20:01:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162070088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53175557] [2021-06-12 20:01:29,315 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 20:01:29,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:29,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:29,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:29,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,451 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 17 treesize of output 13 [2021-06-12 20:01:29,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,454 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 20:01:29,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:29,481 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 20:01:29,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:01:29,544 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:01:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:29,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,557 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 20:01:29,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,563 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 20:01:29,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,567 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 20:01:29,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,639 INFO L628 ElimStorePlain]: treesize reduction 91, result has 46.2 percent of original size [2021-06-12 20:01:29,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:29,643 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:29,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,646 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 12 treesize of output 8 [2021-06-12 20:01:29,647 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:29,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:29,672 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 20:01:29,672 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-06-12 20:01:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53175557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499798001] [2021-06-12 20:01:29,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:29,735 INFO L87 Difference]: Start difference. First operand 1131 states and 3628 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 20:01:29,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:29,937 INFO L93 Difference]: Finished difference Result 1297 states and 4115 transitions. [2021-06-12 20:01:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:29,937 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 24 [2021-06-12 20:01:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:29,938 INFO L225 Difference]: With dead ends: 1297 [2021-06-12 20:01:29,939 INFO L226 Difference]: Without dead ends: 1237 [2021-06-12 20:01:29,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-12 20:01:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1131. [2021-06-12 20:01:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.2106194690265486) internal successors, (3628), 1130 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3628 transitions. [2021-06-12 20:01:29,950 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3628 transitions. Word has length 24 [2021-06-12 20:01:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:29,950 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3628 transitions. [2021-06-12 20:01:29,950 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 20:01:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3628 transitions. [2021-06-12 20:01:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:29,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:29,957 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:30,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2227,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:30,157 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 777459088, now seen corresponding path program 279 times [2021-06-12 20:01:30,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:30,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729300381] [2021-06-12 20:01:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:30,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:30,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729300381] [2021-06-12 20:01:30,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729300381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039287762] [2021-06-12 20:01:30,354 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 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 20:01:30,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:30,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:30,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,457 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 20:01:30,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,460 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 20:01:30,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,515 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 18 treesize of output 14 [2021-06-12 20:01:30,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,526 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 18 treesize of output 14 [2021-06-12 20:01:30,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:30,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:01:30,677 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 20:01:30,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,681 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 20 treesize of output 16 [2021-06-12 20:01:30,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,685 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 20:01:30,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,690 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 20 treesize of output 16 [2021-06-12 20:01:30,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,693 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 20:01:30,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,747 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 13 treesize of output 9 [2021-06-12 20:01:30,748 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,752 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 13 treesize of output 9 [2021-06-12 20:01:30,753 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:30,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,756 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 12 treesize of output 8 [2021-06-12 20:01:30,757 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:30,761 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:30,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:30,807 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-06-12 20:01:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039287762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:30,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238301698] [2021-06-12 20:01:30,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:30,952 INFO L87 Difference]: Start difference. First operand 1131 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:31,493 INFO L93 Difference]: Finished difference Result 1535 states and 4740 transitions. [2021-06-12 20:01:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:31,495 INFO L225 Difference]: With dead ends: 1535 [2021-06-12 20:01:31,495 INFO L226 Difference]: Without dead ends: 1442 [2021-06-12 20:01:31,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-12 20:01:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1142. [2021-06-12 20:01:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.2208588957055215) internal successors, (3675), 1141 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3675 transitions. [2021-06-12 20:01:31,508 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3675 transitions. Word has length 24 [2021-06-12 20:01:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:31,508 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3675 transitions. [2021-06-12 20:01:31,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3675 transitions. [2021-06-12 20:01:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:31,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:31,510 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:31,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-06-12 20:01:31,710 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1551663458, now seen corresponding path program 280 times [2021-06-12 20:01:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:31,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461026092] [2021-06-12 20:01:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:31,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461026092] [2021-06-12 20:01:31,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461026092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478641834] [2021-06-12 20:01:31,960 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 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 20:01:31,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:32,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,062 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 20:01:32,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,065 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 17 treesize of output 13 [2021-06-12 20:01:32,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:32,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,119 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 18 treesize of output 14 [2021-06-12 20:01:32,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,122 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 18 treesize of output 14 [2021-06-12 20:01:32,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:32,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:32,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:01:32,300 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:01:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,304 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 20:01:32,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,308 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 19 treesize of output 15 [2021-06-12 20:01:32,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,312 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 19 treesize of output 15 [2021-06-12 20:01:32,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,315 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 20:01:32,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,386 INFO L628 ElimStorePlain]: treesize reduction 91, result has 46.2 percent of original size [2021-06-12 20:01:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,390 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 12 treesize of output 8 [2021-06-12 20:01:32,391 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:32,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,394 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 12 treesize of output 8 [2021-06-12 20:01:32,395 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:32,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:32,424 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 20:01:32,424 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-06-12 20:01:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:32,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478641834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:32,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:32,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:32,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204468492] [2021-06-12 20:01:32,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:32,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:32,505 INFO L87 Difference]: Start difference. First operand 1142 states and 3675 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:32,885 INFO L93 Difference]: Finished difference Result 1378 states and 4343 transitions. [2021-06-12 20:01:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:32,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:32,887 INFO L225 Difference]: With dead ends: 1378 [2021-06-12 20:01:32,887 INFO L226 Difference]: Without dead ends: 1306 [2021-06-12 20:01:32,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-12 20:01:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1132. [2021-06-12 20:01:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 3.21131741821397) internal successors, (3632), 1131 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 3632 transitions. [2021-06-12 20:01:32,899 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 3632 transitions. Word has length 24 [2021-06-12 20:01:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:32,899 INFO L482 AbstractCegarLoop]: Abstraction has 1132 states and 3632 transitions. [2021-06-12 20:01:32,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 3632 transitions. [2021-06-12 20:01:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:32,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:32,900 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:33,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2244 [2021-06-12 20:01:33,100 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash -334922246, now seen corresponding path program 281 times [2021-06-12 20:01:33,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:33,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913602791] [2021-06-12 20:01:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:33,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913602791] [2021-06-12 20:01:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913602791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325902796] [2021-06-12 20:01:33,280 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 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 20:01:33,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:01:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:33,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:33,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:33,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,359 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 19 treesize of output 15 [2021-06-12 20:01:33,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:33,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:33,393 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 20:01:33,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:01:33,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,500 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 20:01:33,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,503 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 20 treesize of output 16 [2021-06-12 20:01:33,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,531 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 12 treesize of output 8 [2021-06-12 20:01:33,532 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:33,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,535 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 13 treesize of output 9 [2021-06-12 20:01:33,536 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:33,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:33,560 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 20:01:33,560 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:81, output treesize:27 [2021-06-12 20:01:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:33,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325902796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:33,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:33,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336816522] [2021-06-12 20:01:33,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:33,627 INFO L87 Difference]: Start difference. First operand 1132 states and 3632 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:34,086 INFO L93 Difference]: Finished difference Result 1220 states and 3856 transitions. [2021-06-12 20:01:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:34,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:34,088 INFO L225 Difference]: With dead ends: 1220 [2021-06-12 20:01:34,088 INFO L226 Difference]: Without dead ends: 1181 [2021-06-12 20:01:34,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-12 20:01:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1138. [2021-06-12 20:01:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2110817941952505) internal successors, (3651), 1137 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3651 transitions. [2021-06-12 20:01:34,099 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3651 transitions. Word has length 24 [2021-06-12 20:01:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:34,099 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3651 transitions. [2021-06-12 20:01:34,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3651 transitions. [2021-06-12 20:01:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:34,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:34,100 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:34,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:34,301 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1991714584, now seen corresponding path program 282 times [2021-06-12 20:01:34,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:34,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878304786] [2021-06-12 20:01:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:34,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:34,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878304786] [2021-06-12 20:01:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878304786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139963588] [2021-06-12 20:01:34,518 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 20:01:34,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:34,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:34,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:34,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,606 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 19 treesize of output 15 [2021-06-12 20:01:34,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,637 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 20:01:34,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:01:34,702 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:01:34,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,706 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 19 treesize of output 15 [2021-06-12 20:01:34,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,709 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 19 treesize of output 15 [2021-06-12 20:01:34,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,713 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 20 treesize of output 16 [2021-06-12 20:01:34,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,716 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 20 treesize of output 16 [2021-06-12 20:01:34,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,775 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 11 treesize of output 7 [2021-06-12 20:01:34,776 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:34,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:01:34,781 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:34,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,784 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 13 treesize of output 9 [2021-06-12 20:01:34,785 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:34,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,788 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 13 treesize of output 9 [2021-06-12 20:01:34,789 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:34,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,844 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 20:01:34,844 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-12 20:01:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:34,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139963588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:34,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426637166] [2021-06-12 20:01:34,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:34,986 INFO L87 Difference]: Start difference. First operand 1138 states and 3651 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:35,399 INFO L93 Difference]: Finished difference Result 1303 states and 4095 transitions. [2021-06-12 20:01:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:35,400 INFO L225 Difference]: With dead ends: 1303 [2021-06-12 20:01:35,400 INFO L226 Difference]: Without dead ends: 1237 [2021-06-12 20:01:35,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-12 20:01:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1136. [2021-06-12 20:01:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2123348017621147) internal successors, (3646), 1135 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3646 transitions. [2021-06-12 20:01:35,412 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3646 transitions. Word has length 24 [2021-06-12 20:01:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:35,412 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3646 transitions. [2021-06-12 20:01:35,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3646 transitions. [2021-06-12 20:01:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:35,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:35,413 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:35,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2259 [2021-06-12 20:01:35,614 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash -34134520, now seen corresponding path program 283 times [2021-06-12 20:01:35,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:35,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777241836] [2021-06-12 20:01:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:35,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:35,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777241836] [2021-06-12 20:01:35,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777241836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524988458] [2021-06-12 20:01:35,817 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 20:01:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,907 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 20:01:35,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,911 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 18 treesize of output 14 [2021-06-12 20:01:35,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,914 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 18 treesize of output 14 [2021-06-12 20:01:35,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,917 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 20:01:35,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:35,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:35,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 20:01:36,079 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-12 20:01:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,082 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 20 treesize of output 16 [2021-06-12 20:01:36,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,086 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 20 treesize of output 16 [2021-06-12 20:01:36,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,090 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 20:01:36,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:36,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:36,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:01:36,152 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:36,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,155 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 12 treesize of output 8 [2021-06-12 20:01:36,156 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:36,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,160 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 12 treesize of output 8 [2021-06-12 20:01:36,161 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:36,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,164 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 13 treesize of output 9 [2021-06-12 20:01:36,165 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:36,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:36,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:36,218 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-12 20:01:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:36,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524988458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:36,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:36,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660223741] [2021-06-12 20:01:36,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:36,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:36,356 INFO L87 Difference]: Start difference. First operand 1136 states and 3646 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:36,867 INFO L93 Difference]: Finished difference Result 1477 states and 4585 transitions. [2021-06-12 20:01:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:36,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:36,869 INFO L225 Difference]: With dead ends: 1477 [2021-06-12 20:01:36,869 INFO L226 Difference]: Without dead ends: 1384 [2021-06-12 20:01:36,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-12 20:01:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1147. [2021-06-12 20:01:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.222513089005236) internal successors, (3693), 1146 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3693 transitions. [2021-06-12 20:01:36,882 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3693 transitions. Word has length 24 [2021-06-12 20:01:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:36,882 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3693 transitions. [2021-06-12 20:01:36,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3693 transitions. [2021-06-12 20:01:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:36,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:36,883 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:37,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-12 20:01:37,083 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash 740069850, now seen corresponding path program 284 times [2021-06-12 20:01:37,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:37,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672496076] [2021-06-12 20:01:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:37,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:37,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672496076] [2021-06-12 20:01:37,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672496076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820034054] [2021-06-12 20:01:37,336 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 20:01:37,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:37,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:37,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:37,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,438 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 20:01:37,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,441 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 18 treesize of output 14 [2021-06-12 20:01:37,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,444 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 20:01:37,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:37,493 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 20:01:37,625 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:01:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,629 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 20:01:37,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,632 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 20:01:37,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,669 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 12 treesize of output 8 [2021-06-12 20:01:37,670 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:37,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,673 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 12 treesize of output 8 [2021-06-12 20:01:37,674 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:37,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,699 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 20:01:37,699 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:31 [2021-06-12 20:01:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:37,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820034054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:37,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:37,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924775661] [2021-06-12 20:01:37,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:37,784 INFO L87 Difference]: Start difference. First operand 1147 states and 3693 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:37,982 INFO L93 Difference]: Finished difference Result 1317 states and 4152 transitions. [2021-06-12 20:01:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:37,984 INFO L225 Difference]: With dead ends: 1317 [2021-06-12 20:01:37,984 INFO L226 Difference]: Without dead ends: 1255 [2021-06-12 20:01:37,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-12 20:01:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1134. [2021-06-12 20:01:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2135922330097086) internal successors, (3641), 1133 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3641 transitions. [2021-06-12 20:01:37,996 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3641 transitions. Word has length 24 [2021-06-12 20:01:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:37,996 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3641 transitions. [2021-06-12 20:01:37,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3641 transitions. [2021-06-12 20:01:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:37,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:37,998 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:38,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2279 [2021-06-12 20:01:38,198 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1545890692, now seen corresponding path program 285 times [2021-06-12 20:01:38,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:38,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81280194] [2021-06-12 20:01:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:38,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:38,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81280194] [2021-06-12 20:01:38,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81280194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679729834] [2021-06-12 20:01:38,333 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 20:01:38,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:38,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [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 26 treesize of output 20 [2021-06-12 20:01:38,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,431 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 25 treesize of output 19 [2021-06-12 20:01:38,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:38,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:38,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:45 [2021-06-12 20:01:38,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:38,503 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 19 treesize of output 15 [2021-06-12 20:01:38,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:38,512 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 11 treesize of output 7 [2021-06-12 20:01:38,513 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:38,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:38,518 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 20:01:38,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:11 [2021-06-12 20:01:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:38,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679729834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:38,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:38,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558473234] [2021-06-12 20:01:38,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:38,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:38,557 INFO L87 Difference]: Start difference. First operand 1134 states and 3641 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:38,819 INFO L93 Difference]: Finished difference Result 1350 states and 4257 transitions. [2021-06-12 20:01:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:38,821 INFO L225 Difference]: With dead ends: 1350 [2021-06-12 20:01:38,821 INFO L226 Difference]: Without dead ends: 1319 [2021-06-12 20:01:38,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-12 20:01:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1142. [2021-06-12 20:01:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.21034180543383) internal successors, (3663), 1141 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3663 transitions. [2021-06-12 20:01:38,832 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3663 transitions. Word has length 24 [2021-06-12 20:01:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:38,832 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3663 transitions. [2021-06-12 20:01:38,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3663 transitions. [2021-06-12 20:01:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:38,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:38,834 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:39,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2289 [2021-06-12 20:01:39,034 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1011104788, now seen corresponding path program 286 times [2021-06-12 20:01:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:39,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084450457] [2021-06-12 20:01:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:39,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:39,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084450457] [2021-06-12 20:01:39,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084450457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771530247] [2021-06-12 20:01:39,192 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 20:01:39,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:39,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:39,281 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 27 treesize of output 21 [2021-06-12 20:01:39,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:39,284 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 26 treesize of output 20 [2021-06-12 20:01:39,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,287 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 36 treesize of output 28 [2021-06-12 20:01:39,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:39,290 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 35 treesize of output 27 [2021-06-12 20:01:39,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,353 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-06-12 20:01:39,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:39,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:124 [2021-06-12 20:01:39,421 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 37 treesize of output 29 [2021-06-12 20:01:39,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:01:39,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,514 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1063 vanished before elimination [2021-06-12 20:01:39,514 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:01:39,517 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 20:01:39,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,519 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 19 treesize of output 15 [2021-06-12 20:01:39,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1065 vanished before elimination [2021-06-12 20:01:39,558 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 19 treesize of output 15 [2021-06-12 20:01:39,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,560 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 20:01:39,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,593 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1067 vanished before elimination [2021-06-12 20:01:39,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:01:39,594 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:187, output treesize:81 [2021-06-12 20:01:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:39,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771530247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:39,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 20:01:39,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184714106] [2021-06-12 20:01:39,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:39,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:39,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:39,667 INFO L87 Difference]: Start difference. First operand 1142 states and 3663 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 20:01:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,021 INFO L93 Difference]: Finished difference Result 1382 states and 4337 transitions. [2021-06-12 20:01:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:40,022 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 24 [2021-06-12 20:01:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,023 INFO L225 Difference]: With dead ends: 1382 [2021-06-12 20:01:40,023 INFO L226 Difference]: Without dead ends: 1347 [2021-06-12 20:01:40,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-12 20:01:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1140. [2021-06-12 20:01:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.211589113257243) internal successors, (3658), 1139 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3658 transitions. [2021-06-12 20:01:40,035 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3658 transitions. Word has length 24 [2021-06-12 20:01:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,036 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 3658 transitions. [2021-06-12 20:01:40,036 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 20:01:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3658 transitions. [2021-06-12 20:01:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:40,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,037 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:40,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:40,245 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash 473611932, now seen corresponding path program 287 times [2021-06-12 20:01:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:40,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414783462] [2021-06-12 20:01:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:40,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:40,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414783462] [2021-06-12 20:01:40,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414783462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598850374] [2021-06-12 20:01:40,449 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 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 20:01:40,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:01:40,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:40,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:40,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 20:01:40,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:40,557 INFO 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 20:01:40,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-06-12 20:01:40,588 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:01:40,589 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 19 treesize of output 15 [2021-06-12 20:01:40,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,592 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 20 treesize of output 16 [2021-06-12 20:01:40,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:40,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,613 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 12 treesize of output 8 [2021-06-12 20:01:40,614 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:40,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,616 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 13 treesize of output 9 [2021-06-12 20:01:40,617 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:40,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:40,634 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 20:01:40,634 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-12 20:01:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598850374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:40,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572637127] [2021-06-12 20:01:40,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:40,700 INFO L87 Difference]: Start difference. First operand 1140 states and 3658 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,961 INFO L93 Difference]: Finished difference Result 1346 states and 4247 transitions. [2021-06-12 20:01:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:40,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,963 INFO L225 Difference]: With dead ends: 1346 [2021-06-12 20:01:40,963 INFO L226 Difference]: Without dead ends: 1307 [2021-06-12 20:01:40,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-12 20:01:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1138. [2021-06-12 20:01:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.212840809146878) internal successors, (3653), 1137 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3653 transitions. [2021-06-12 20:01:40,974 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3653 transitions. Word has length 24 [2021-06-12 20:01:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,974 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3653 transitions. [2021-06-12 20:01:40,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3653 transitions. [2021-06-12 20:01:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:40,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,976 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:41,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2301 [2021-06-12 20:01:41,183 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1026883406, now seen corresponding path program 288 times [2021-06-12 20:01:41,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011887227] [2021-06-12 20:01:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:41,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011887227] [2021-06-12 20:01:41,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011887227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457284003] [2021-06-12 20:01:41,350 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 20:01:41,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:01:41,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:41,429 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 37 treesize of output 29 [2021-06-12 20:01:41,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-12 20:01:41,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,435 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 28 treesize of output 22 [2021-06-12 20:01:41,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,438 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 28 treesize of output 22 [2021-06-12 20:01:41,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:41,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:151 [2021-06-12 20:01:41,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-12 20:01:41,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,582 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 41 treesize of output 33 [2021-06-12 20:01:41,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,585 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 40 treesize of output 32 [2021-06-12 20:01:41,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,588 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 30 treesize of output 24 [2021-06-12 20:01:41,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,591 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 30 treesize of output 24 [2021-06-12 20:01:41,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,594 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 31 treesize of output 25 [2021-06-12 20:01:41,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,598 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 40 treesize of output 32 [2021-06-12 20:01:41,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,600 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 41 treesize of output 33 [2021-06-12 20:01:41,601 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,694 INFO L628 ElimStorePlain]: treesize reduction 84, result has 56.5 percent of original size [2021-06-12 20:01:41,694 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:41,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:01:41,695 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:373, output treesize:109 [2021-06-12 20:01:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:41,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457284003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:41,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102948814] [2021-06-12 20:01:41,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:41,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:41,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:41,806 INFO L87 Difference]: Start difference. First operand 1138 states and 3653 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:01:42,115 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-06-12 20:01:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:42,216 INFO L93 Difference]: Finished difference Result 1480 states and 4556 transitions. [2021-06-12 20:01:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 24 [2021-06-12 20:01:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:42,218 INFO L225 Difference]: With dead ends: 1480 [2021-06-12 20:01:42,218 INFO L226 Difference]: Without dead ends: 1388 [2021-06-12 20:01:42,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-12 20:01:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1136. [2021-06-12 20:01:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2140969162995594) internal successors, (3648), 1135 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3648 transitions. [2021-06-12 20:01:42,230 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3648 transitions. Word has length 24 [2021-06-12 20:01:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:42,230 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3648 transitions. [2021-06-12 20:01:42,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:01:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3648 transitions. [2021-06-12 20:01:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:42,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:42,231 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:42,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:42,432 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:42,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1455647194, now seen corresponding path program 289 times [2021-06-12 20:01:42,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258543605] [2021-06-12 20:01:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:42,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:42,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258543605] [2021-06-12 20:01:42,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258543605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042675931] [2021-06-12 20:01:42,580 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 20:01:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:42,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,741 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 17 treesize of output 13 [2021-06-12 20:01:42,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,764 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 20:01:42,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-12 20:01:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:42,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:42,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,887 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-12 20:01:42,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,889 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 11 treesize of output 7 [2021-06-12 20:01:42,890 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:42,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,899 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 20:01:42,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-12 20:01:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:42,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042675931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:42,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724140854] [2021-06-12 20:01:42,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:42,935 INFO L87 Difference]: Start difference. First operand 1136 states and 3648 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:43,201 INFO L93 Difference]: Finished difference Result 1353 states and 4252 transitions. [2021-06-12 20:01:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:43,203 INFO L225 Difference]: With dead ends: 1353 [2021-06-12 20:01:43,203 INFO L226 Difference]: Without dead ends: 1294 [2021-06-12 20:01:43,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-12 20:01:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1137. [2021-06-12 20:01:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.214788732394366) internal successors, (3652), 1136 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3652 transitions. [2021-06-12 20:01:43,214 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3652 transitions. Word has length 24 [2021-06-12 20:01:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:43,214 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3652 transitions. [2021-06-12 20:01:43,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3652 transitions. [2021-06-12 20:01:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:43,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:43,215 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:43,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2309 [2021-06-12 20:01:43,416 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -282324622, now seen corresponding path program 290 times [2021-06-12 20:01:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:43,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363390076] [2021-06-12 20:01:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:43,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363390076] [2021-06-12 20:01:43,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363390076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934564734] [2021-06-12 20:01:43,586 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 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 20:01:43,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:43,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:43,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:01:43,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,751 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 26 treesize of output 20 [2021-06-12 20:01:43,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,774 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 20:01:43,774 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:61 [2021-06-12 20:01:43,828 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:01:43,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,831 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 20 treesize of output 16 [2021-06-12 20:01:43,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,834 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 20:01:43,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,859 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 11 treesize of output 7 [2021-06-12 20:01:43,860 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:43,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:43,864 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:43,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,886 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 20:01:43,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-12 20:01:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:43,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934564734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:43,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:43,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223178332] [2021-06-12 20:01:43,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:43,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:43,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:43,960 INFO L87 Difference]: Start difference. First operand 1137 states and 3652 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:44,258 INFO L93 Difference]: Finished difference Result 1345 states and 4244 transitions. [2021-06-12 20:01:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:44,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:44,259 INFO L225 Difference]: With dead ends: 1345 [2021-06-12 20:01:44,260 INFO L226 Difference]: Without dead ends: 1310 [2021-06-12 20:01:44,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-12 20:01:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1137. [2021-06-12 20:01:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.214788732394366) internal successors, (3652), 1136 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3652 transitions. [2021-06-12 20:01:44,271 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3652 transitions. Word has length 24 [2021-06-12 20:01:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:44,271 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3652 transitions. [2021-06-12 20:01:44,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3652 transitions. [2021-06-12 20:01:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:44,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:44,273 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:44,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2315,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:44,473 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash -819817478, now seen corresponding path program 291 times [2021-06-12 20:01:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316619630] [2021-06-12 20:01:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:44,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:44,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316619630] [2021-06-12 20:01:44,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316619630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:44,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099474457] [2021-06-12 20:01:44,654 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 20:01:44,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:44,767 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 27 treesize of output 21 [2021-06-12 20:01:44,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,769 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 27 treesize of output 21 [2021-06-12 20:01:44,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:44,796 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 20:01:44,796 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:71 [2021-06-12 20:01:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,867 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 20:01:44,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,871 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 20:01:44,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,948 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.0 percent of original size [2021-06-12 20:01:44,948 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:44,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,951 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 20:01:44,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,954 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 20 treesize of output 16 [2021-06-12 20:01:44,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:44,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,988 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 13 treesize of output 9 [2021-06-12 20:01:44,989 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:44,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,992 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 12 treesize of output 8 [2021-06-12 20:01:44,993 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:45,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:45,023 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-12 20:01:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:45,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099474457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:45,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:45,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262103226] [2021-06-12 20:01:45,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:45,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:45,094 INFO L87 Difference]: Start difference. First operand 1137 states and 3652 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 20:01:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:45,345 INFO L93 Difference]: Finished difference Result 1349 states and 4242 transitions. [2021-06-12 20:01:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:45,345 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 24 [2021-06-12 20:01:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:45,347 INFO L225 Difference]: With dead ends: 1349 [2021-06-12 20:01:45,347 INFO L226 Difference]: Without dead ends: 1296 [2021-06-12 20:01:45,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-12 20:01:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1137. [2021-06-12 20:01:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.214788732394366) internal successors, (3652), 1136 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3652 transitions. [2021-06-12 20:01:45,358 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3652 transitions. Word has length 24 [2021-06-12 20:01:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:45,359 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3652 transitions. [2021-06-12 20:01:45,359 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 20:01:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3652 transitions. [2021-06-12 20:01:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:45,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:45,360 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:45,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2323 [2021-06-12 20:01:45,569 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash 566944892, now seen corresponding path program 292 times [2021-06-12 20:01:45,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:45,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033370012] [2021-06-12 20:01:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:45,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:45,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033370012] [2021-06-12 20:01:45,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033370012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047035542] [2021-06-12 20:01:45,723 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 20:01:45,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:45,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:45,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,864 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 18 treesize of output 14 [2021-06-12 20:01:45,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,868 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 20:01:45,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:45,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:45,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:45,994 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:46,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,176 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 27 treesize of output 21 [2021-06-12 20:01:46,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,179 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 27 treesize of output 21 [2021-06-12 20:01:46,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,209 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-12 20:01:46,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,211 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 7 [2021-06-12 20:01:46,212 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:46,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:46,222 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 20:01:46,222 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-06-12 20:01:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047035542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:46,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255083303] [2021-06-12 20:01:46,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:46,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:46,259 INFO L87 Difference]: Start difference. First operand 1137 states and 3652 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:46,923 INFO L93 Difference]: Finished difference Result 1393 states and 4362 transitions. [2021-06-12 20:01:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:46,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:46,925 INFO L225 Difference]: With dead ends: 1393 [2021-06-12 20:01:46,925 INFO L226 Difference]: Without dead ends: 1334 [2021-06-12 20:01:46,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-12 20:01:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1142. [2021-06-12 20:01:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.2191060473269064) internal successors, (3673), 1141 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3673 transitions. [2021-06-12 20:01:46,937 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3673 transitions. Word has length 24 [2021-06-12 20:01:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:46,937 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3673 transitions. [2021-06-12 20:01:46,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3673 transitions. [2021-06-12 20:01:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:46,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:46,938 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:47,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2331 [2021-06-12 20:01:47,138 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1171026924, now seen corresponding path program 293 times [2021-06-12 20:01:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:47,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739588713] [2021-06-12 20:01:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:47,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:47,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739588713] [2021-06-12 20:01:47,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739588713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534142686] [2021-06-12 20:01:47,305 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 20:01:47,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:47,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:47,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:47,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,445 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 20:01:47,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:47,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,513 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 17 treesize of output 13 [2021-06-12 20:01:47,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,516 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 18 treesize of output 14 [2021-06-12 20:01:47,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:47,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:47,730 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:01:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:01:47,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,736 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 19 treesize of output 15 [2021-06-12 20:01:47,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:01:47,762 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:47,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,765 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 7 [2021-06-12 20:01:47,766 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:47,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:47,787 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 20:01:47,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-12 20:01:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:47,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534142686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:47,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:47,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87809338] [2021-06-12 20:01:47,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:47,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:47,839 INFO L87 Difference]: Start difference. First operand 1142 states and 3673 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 20:01:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:48,380 INFO L93 Difference]: Finished difference Result 1432 states and 4457 transitions. [2021-06-12 20:01:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:48,381 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 24 [2021-06-12 20:01:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:48,383 INFO L225 Difference]: With dead ends: 1432 [2021-06-12 20:01:48,383 INFO L226 Difference]: Without dead ends: 1385 [2021-06-12 20:01:48,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 603.8ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-12 20:01:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1144. [2021-06-12 20:01:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.2178477690288716) internal successors, (3678), 1143 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3678 transitions. [2021-06-12 20:01:48,395 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3678 transitions. Word has length 24 [2021-06-12 20:01:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:48,395 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 3678 transitions. [2021-06-12 20:01:48,395 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 20:01:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3678 transitions. [2021-06-12 20:01:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:48,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:48,397 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:48,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:48,597 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash -951730948, now seen corresponding path program 294 times [2021-06-12 20:01:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533132319] [2021-06-12 20:01:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:48,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:48,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533132319] [2021-06-12 20:01:48,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533132319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288880282] [2021-06-12 20:01:48,749 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 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 20:01:48,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:48,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,882 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 18 treesize of output 14 [2021-06-12 20:01:48,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,885 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 20:01:48,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:48,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,949 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 18 treesize of output 14 [2021-06-12 20:01:48,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:48,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:49,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:49,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,205 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 20:01:49,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,208 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 20:01:49,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,237 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-12 20:01:49,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,239 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 7 [2021-06-12 20:01:49,240 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:49,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:49,249 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 20:01:49,249 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-12 20:01:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:49,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288880282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:49,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:49,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538870355] [2021-06-12 20:01:49,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:49,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:49,286 INFO L87 Difference]: Start difference. First operand 1144 states and 3678 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:49,754 INFO L93 Difference]: Finished difference Result 1409 states and 4414 transitions. [2021-06-12 20:01:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:49,756 INFO L225 Difference]: With dead ends: 1409 [2021-06-12 20:01:49,756 INFO L226 Difference]: Without dead ends: 1354 [2021-06-12 20:01:49,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 545.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-12 20:01:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1145. [2021-06-12 20:01:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.214160839160839) internal successors, (3677), 1144 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3677 transitions. [2021-06-12 20:01:49,768 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3677 transitions. Word has length 24 [2021-06-12 20:01:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:49,768 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3677 transitions. [2021-06-12 20:01:49,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3677 transitions. [2021-06-12 20:01:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:49,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:49,769 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:49,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:49,970 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1309599868, now seen corresponding path program 295 times [2021-06-12 20:01:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:49,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652781200] [2021-06-12 20:01:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:50,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:50,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652781200] [2021-06-12 20:01:50,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652781200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416213444] [2021-06-12 20:01:50,191 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 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 20:01:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,334 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 18 treesize of output 14 [2021-06-12 20:01:50,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,338 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 17 treesize of output 13 [2021-06-12 20:01:50,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:50,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,402 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 20:01:50,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,405 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 18 treesize of output 14 [2021-06-12 20:01:50,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:50,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:50,464 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:50,645 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:01:50,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,648 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 19 treesize of output 15 [2021-06-12 20:01:50,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:50,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,680 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 11 treesize of output 7 [2021-06-12 20:01:50,681 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,683 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 11 treesize of output 7 [2021-06-12 20:01:50,684 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:50,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:50,708 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 20:01:50,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-06-12 20:01:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:50,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416213444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:50,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:50,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625898915] [2021-06-12 20:01:50,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:50,777 INFO L87 Difference]: Start difference. First operand 1145 states and 3677 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:51,251 INFO L93 Difference]: Finished difference Result 1421 states and 4488 transitions. [2021-06-12 20:01:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:51,253 INFO L225 Difference]: With dead ends: 1421 [2021-06-12 20:01:51,253 INFO L226 Difference]: Without dead ends: 1375 [2021-06-12 20:01:51,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-12 20:01:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1138. [2021-06-12 20:01:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2154793315743184) internal successors, (3656), 1137 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3656 transitions. [2021-06-12 20:01:51,266 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3656 transitions. Word has length 24 [2021-06-12 20:01:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:51,266 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3656 transitions. [2021-06-12 20:01:51,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3656 transitions. [2021-06-12 20:01:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:51,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:51,267 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:51,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:51,467 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:51,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1135707698, now seen corresponding path program 296 times [2021-06-12 20:01:51,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:51,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096025881] [2021-06-12 20:01:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:51,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:51,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096025881] [2021-06-12 20:01:51,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096025881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69906723] [2021-06-12 20:01:51,609 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 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 20:01:51,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:51,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:51,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,740 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 18 treesize of output 14 [2021-06-12 20:01:51,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,744 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 20:01:51,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:51,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,813 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 20:01:51,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,816 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 18 treesize of output 14 [2021-06-12 20:01:51,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:51,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:51,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:01:51,973 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-06-12 20:01:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,977 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 20:01:51,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,981 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 20 treesize of output 16 [2021-06-12 20:01:51,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,985 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 20 treesize of output 16 [2021-06-12 20:01:51,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:51,989 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 20:01:51,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,047 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 12 treesize of output 8 [2021-06-12 20:01:52,048 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:52,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,052 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 12 treesize of output 8 [2021-06-12 20:01:52,053 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:52,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,056 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 7 [2021-06-12 20:01:52,057 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:52,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:01:52,062 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:52,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:52,115 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:201, output treesize:75 [2021-06-12 20:01:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69906723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:52,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:52,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402381245] [2021-06-12 20:01:52,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:52,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:52,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:52,210 INFO L87 Difference]: Start difference. First operand 1138 states and 3656 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 20:01:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:52,652 INFO L93 Difference]: Finished difference Result 1490 states and 4652 transitions. [2021-06-12 20:01:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:52,652 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 24 [2021-06-12 20:01:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:52,653 INFO L225 Difference]: With dead ends: 1490 [2021-06-12 20:01:52,654 INFO L226 Difference]: Without dead ends: 1443 [2021-06-12 20:01:52,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-12 20:01:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1143. [2021-06-12 20:01:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 3.224168126094571) internal successors, (3682), 1142 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3682 transitions. [2021-06-12 20:01:52,666 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3682 transitions. Word has length 24 [2021-06-12 20:01:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:52,666 INFO L482 AbstractCegarLoop]: Abstraction has 1143 states and 3682 transitions. [2021-06-12 20:01:52,666 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 20:01:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3682 transitions. [2021-06-12 20:01:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:52,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:52,667 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:52,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2370 [2021-06-12 20:01:52,867 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:52,868 INFO L82 PathProgramCache]: Analyzing trace with hash 255434162, now seen corresponding path program 297 times [2021-06-12 20:01:52,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:52,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527467104] [2021-06-12 20:01:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:53,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:53,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527467104] [2021-06-12 20:01:53,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527467104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783212986] [2021-06-12 20:01:53,017 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 20:01:53,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:53,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:53,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:53,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,105 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 17 treesize of output 13 [2021-06-12 20:01:53,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,107 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 18 treesize of output 14 [2021-06-12 20:01:53,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,131 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 20:01:53,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-12 20:01:53,183 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:01:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,186 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 19 treesize of output 15 [2021-06-12 20:01:53,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,190 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 20:01:53,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,194 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 20 treesize of output 16 [2021-06-12 20:01:53,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,197 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 20 treesize of output 16 [2021-06-12 20:01:53,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,264 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 12 treesize of output 8 [2021-06-12 20:01:53,265 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:53,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,268 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 12 treesize of output 8 [2021-06-12 20:01:53,269 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:53,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:01:53,274 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:53,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,277 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 11 treesize of output 7 [2021-06-12 20:01:53,278 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:53,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,337 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 20:01:53,337 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:75 [2021-06-12 20:01:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:53,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783212986] 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 17 [2021-06-12 20:01:53,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553739210] [2021-06-12 20:01:53,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 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 17 interpolants. [2021-06-12 20:01:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:53,473 INFO L87 Difference]: Start difference. First operand 1143 states and 3682 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 20:01:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:54,144 INFO L93 Difference]: Finished difference Result 1466 states and 4582 transitions. [2021-06-12 20:01:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:54,144 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 24 [2021-06-12 20:01:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:54,146 INFO L225 Difference]: With dead ends: 1466 [2021-06-12 20:01:54,146 INFO L226 Difference]: Without dead ends: 1425 [2021-06-12 20:01:54,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-12 20:01:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1138. [2021-06-12 20:01:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2154793315743184) internal successors, (3656), 1137 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3656 transitions. [2021-06-12 20:01:54,158 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3656 transitions. Word has length 24 [2021-06-12 20:01:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:54,158 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3656 transitions. [2021-06-12 20:01:54,158 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 20:01:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3656 transitions. [2021-06-12 20:01:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:54,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:54,159 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:54,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2380,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:54,360 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1969479068, now seen corresponding path program 298 times [2021-06-12 20:01:54,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:54,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899557052] [2021-06-12 20:01:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:54,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899557052] [2021-06-12 20:01:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899557052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855114664] [2021-06-12 20:01:54,564 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 20:01:54,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:54,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:54,656 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 20:01:54,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,659 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 20:01:54,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,662 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 19 treesize of output 15 [2021-06-12 20:01:54,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,665 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 19 treesize of output 15 [2021-06-12 20:01:54,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:54,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:54,723 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:01:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,893 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 29 treesize of output 23 [2021-06-12 20:01:54,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,897 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 30 treesize of output 24 [2021-06-12 20:01:54,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,972 INFO L628 ElimStorePlain]: treesize reduction 56, result has 65.6 percent of original size [2021-06-12 20:01:54,972 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,975 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 20:01:54,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,978 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 30 treesize of output 24 [2021-06-12 20:01:54,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,019 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 7 [2021-06-12 20:01:55,020 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:55,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,022 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 12 treesize of output 8 [2021-06-12 20:01:55,023 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:55,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:55,052 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-06-12 20:01:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855114664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:55,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:01:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316397651] [2021-06-12 20:01:55,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:55,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:55,129 INFO L87 Difference]: Start difference. First operand 1138 states and 3656 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:55,492 INFO L93 Difference]: Finished difference Result 1422 states and 4483 transitions. [2021-06-12 20:01:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:01:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:55,494 INFO L225 Difference]: With dead ends: 1422 [2021-06-12 20:01:55,494 INFO L226 Difference]: Without dead ends: 1369 [2021-06-12 20:01:55,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-12 20:01:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1141. [2021-06-12 20:01:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.2157894736842105) internal successors, (3666), 1140 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3666 transitions. [2021-06-12 20:01:55,505 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3666 transitions. Word has length 24 [2021-06-12 20:01:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:55,505 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3666 transitions. [2021-06-12 20:01:55,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:01:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3666 transitions. [2021-06-12 20:01:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:55,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:55,507 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:55,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2389,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:55,707 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1148602, now seen corresponding path program 299 times [2021-06-12 20:01:55,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:55,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567950252] [2021-06-12 20:01:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:55,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:55,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567950252] [2021-06-12 20:01:55,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567950252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227461725] [2021-06-12 20:01:55,866 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 20:01:55,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:01:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:55,957 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 19 treesize of output 15 [2021-06-12 20:01:55,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,960 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 20:01:55,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,993 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 20:01:55,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:01:56,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,055 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 20:01:56,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,058 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 20 treesize of output 16 [2021-06-12 20:01:56,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,114 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 13 treesize of output 9 [2021-06-12 20:01:56,115 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:56,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,118 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 11 treesize of output 7 [2021-06-12 20:01:56,119 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:56,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,171 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 20 treesize of output 16 [2021-06-12 20:01:56,172 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,175 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 20:01:56,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,224 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 13 treesize of output 9 [2021-06-12 20:01:56,225 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,228 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 8 [2021-06-12 20:01:56,229 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:56,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:56,274 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:01:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:56,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227461725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:56,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:01:56,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866164195] [2021-06-12 20:01:56,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:56,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:56,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:56,369 INFO L87 Difference]: Start difference. First operand 1141 states and 3666 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 20:01:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:56,734 INFO L93 Difference]: Finished difference Result 1448 states and 4539 transitions. [2021-06-12 20:01:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:56,735 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 24 [2021-06-12 20:01:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:56,736 INFO L225 Difference]: With dead ends: 1448 [2021-06-12 20:01:56,736 INFO L226 Difference]: Without dead ends: 1401 [2021-06-12 20:01:56,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-12 20:01:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1146. [2021-06-12 20:01:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2244541484716156) internal successors, (3692), 1145 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3692 transitions. [2021-06-12 20:01:56,748 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3692 transitions. Word has length 24 [2021-06-12 20:01:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:56,748 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3692 transitions. [2021-06-12 20:01:56,748 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 20:01:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3692 transitions. [2021-06-12 20:01:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:56,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:56,750 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:56,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2398 [2021-06-12 20:01:56,950 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash -879124934, now seen corresponding path program 300 times [2021-06-12 20:01:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:56,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390582866] [2021-06-12 20:01:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:57,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390582866] [2021-06-12 20:01:57,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390582866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002958377] [2021-06-12 20:01:57,073 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 20:01:57,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:57,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:57,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:57,164 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 19 treesize of output 15 [2021-06-12 20:01:57,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,167 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 19 treesize of output 15 [2021-06-12 20:01:57,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,171 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 19 treesize of output 15 [2021-06-12 20:01:57,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,174 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 19 treesize of output 15 [2021-06-12 20:01:57,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:01:57,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:01:57,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,350 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 20 treesize of output 16 [2021-06-12 20:01:57,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,355 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 20:01:57,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,530 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-06-12 20:01:57,531 INFO L628 ElimStorePlain]: treesize reduction 163, result has 55.3 percent of original size [2021-06-12 20:01:57,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,535 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 20:01:57,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1108 vanished before elimination [2021-06-12 20:01:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,616 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 11 treesize of output 7 [2021-06-12 20:01:57,617 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:57,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,689 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 20 treesize of output 16 [2021-06-12 20:01:57,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,693 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 20:01:57,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,758 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 11 treesize of output 9 [2021-06-12 20:01:57,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,821 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 11 treesize of output 7 [2021-06-12 20:01:57,822 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:01:57,827 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:01:57,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:57,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1113 vanished before elimination [2021-06-12 20:01:57,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:01:57,887 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-12 20:01:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:01:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002958377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:58,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:58,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784162985] [2021-06-12 20:01:58,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:58,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:58,013 INFO L87 Difference]: Start difference. First operand 1146 states and 3692 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 20:01:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:58,411 INFO L93 Difference]: Finished difference Result 1643 states and 5046 transitions. [2021-06-12 20:01:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:58,412 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 24 [2021-06-12 20:01:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:58,414 INFO L225 Difference]: With dead ends: 1643 [2021-06-12 20:01:58,414 INFO L226 Difference]: Without dead ends: 1525 [2021-06-12 20:01:58,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-12 20:01:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1138. [2021-06-12 20:01:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2154793315743184) internal successors, (3656), 1137 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3656 transitions. [2021-06-12 20:01:58,427 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3656 transitions. Word has length 24 [2021-06-12 20:01:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:58,427 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3656 transitions. [2021-06-12 20:01:58,427 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 20:01:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3656 transitions. [2021-06-12 20:01:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:58,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:58,428 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:58,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:58,629 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash -458036400, now seen corresponding path program 301 times [2021-06-12 20:01:58,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:58,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210516088] [2021-06-12 20:01:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:58,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:58,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210516088] [2021-06-12 20:01:58,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210516088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407374257] [2021-06-12 20:01:58,776 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 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 20:01:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:58,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:01:58,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:58,836 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 20:01:58,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:01:58,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,841 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 19 treesize of output 15 [2021-06-12 20:01:58,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,844 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 20:01:58,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:58,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:58,881 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-12 20:01:59,002 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 29 treesize of output 23 [2021-06-12 20:01:59,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,005 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 30 treesize of output 24 [2021-06-12 20:01:59,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,007 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 29 treesize of output 23 [2021-06-12 20:01:59,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,010 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 30 treesize of output 24 [2021-06-12 20:01:59,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,050 INFO L628 ElimStorePlain]: treesize reduction 26, result has 64.4 percent of original size [2021-06-12 20:01:59,050 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:01:59,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:59,051 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:47 [2021-06-12 20:01:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407374257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:59,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:01:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863530360] [2021-06-12 20:01:59,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:59,120 INFO L87 Difference]: Start difference. First operand 1138 states and 3656 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 20:01:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:59,571 INFO L93 Difference]: Finished difference Result 1617 states and 5001 transitions. [2021-06-12 20:01:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:59,572 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 24 [2021-06-12 20:01:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:59,574 INFO L225 Difference]: With dead ends: 1617 [2021-06-12 20:01:59,574 INFO L226 Difference]: Without dead ends: 1560 [2021-06-12 20:01:59,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-12 20:01:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1143. [2021-06-12 20:01:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 3.214535901926445) internal successors, (3671), 1142 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3671 transitions. [2021-06-12 20:01:59,587 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3671 transitions. Word has length 24 [2021-06-12 20:01:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:59,587 INFO L482 AbstractCegarLoop]: Abstraction has 1143 states and 3671 transitions. [2021-06-12 20:01:59,587 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 20:01:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3671 transitions. [2021-06-12 20:01:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:01:59,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:59,589 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:59,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2418,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:59,789 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1192496590, now seen corresponding path program 302 times [2021-06-12 20:01:59,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:59,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919059874] [2021-06-12 20:01:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:01:59,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919059874] [2021-06-12 20:01:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919059874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735936562] [2021-06-12 20:01:59,987 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 20:02:00,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:00,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:00,053 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 19 treesize of output 15 [2021-06-12 20:02:00,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,055 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 20:02:00,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,079 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 20:02:00,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-06-12 20:02:00,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:00,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:00,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:00,230 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,232 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 13 treesize of output 9 [2021-06-12 20:02:00,233 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:00,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:00,251 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 20:02:00,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-12 20:02:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:00,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735936562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:00,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:00,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818394100] [2021-06-12 20:02:00,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:00,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:00,320 INFO L87 Difference]: Start difference. First operand 1143 states and 3671 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:00,891 INFO L93 Difference]: Finished difference Result 1539 states and 4831 transitions. [2021-06-12 20:02:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:00,893 INFO L225 Difference]: With dead ends: 1539 [2021-06-12 20:02:00,893 INFO L226 Difference]: Without dead ends: 1500 [2021-06-12 20:02:00,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-12 20:02:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1146. [2021-06-12 20:02:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2148471615720524) internal successors, (3681), 1145 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3681 transitions. [2021-06-12 20:02:00,906 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3681 transitions. Word has length 24 [2021-06-12 20:02:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:00,906 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3681 transitions. [2021-06-12 20:02:00,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3681 transitions. [2021-06-12 20:02:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:00,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:00,907 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:01,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2423,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,107 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1134140240, now seen corresponding path program 303 times [2021-06-12 20:02:01,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:01,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61660913] [2021-06-12 20:02:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:01,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:01,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61660913] [2021-06-12 20:02:01,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61660913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114255141] [2021-06-12 20:02:01,335 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 20:02:01,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:01,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:01,400 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 19 treesize of output 15 [2021-06-12 20:02:01,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,403 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 19 treesize of output 15 [2021-06-12 20:02:01,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:01,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,409 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 20:02:01,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:01,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-12 20:02:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,651 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 19 treesize of output 15 [2021-06-12 20:02:01,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:01,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,832 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-12 20:02:01,833 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.5 percent of original size [2021-06-12 20:02:01,850 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 11 treesize of output 9 [2021-06-12 20:02:01,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,922 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:01,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,926 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 19 treesize of output 15 [2021-06-12 20:02:01,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:02,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,008 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 7 [2021-06-12 20:02:02,009 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:02,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:02,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,077 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 19 treesize of output 15 [2021-06-12 20:02:02,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,081 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 20 treesize of output 16 [2021-06-12 20:02:02,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:02,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,146 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 13 treesize of output 9 [2021-06-12 20:02:02,147 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:02,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,150 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 12 treesize of output 8 [2021-06-12 20:02:02,151 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:02,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:02,211 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1118 vanished before elimination [2021-06-12 20:02:02,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:02:02,217 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-12 20:02:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114255141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:02,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:02,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:02,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053076903] [2021-06-12 20:02:02,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:02,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:02,363 INFO L87 Difference]: Start difference. First operand 1146 states and 3681 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:03,290 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-12 20:02:03,570 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-06-12 20:02:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:03,580 INFO L93 Difference]: Finished difference Result 1924 states and 5883 transitions. [2021-06-12 20:02:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:02:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:03,583 INFO L225 Difference]: With dead ends: 1924 [2021-06-12 20:02:03,583 INFO L226 Difference]: Without dead ends: 1771 [2021-06-12 20:02:03,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1344.3ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-06-12 20:02:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1149. [2021-06-12 20:02:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.215156794425087) internal successors, (3691), 1148 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3691 transitions. [2021-06-12 20:02:03,597 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3691 transitions. Word has length 24 [2021-06-12 20:02:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:03,597 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 3691 transitions. [2021-06-12 20:02:03,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3691 transitions. [2021-06-12 20:02:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:03,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:03,598 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:03,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2428 [2021-06-12 20:02:03,799 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1209740006, now seen corresponding path program 304 times [2021-06-12 20:02:03,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:03,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187354510] [2021-06-12 20:02:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:04,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187354510] [2021-06-12 20:02:04,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187354510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678224027] [2021-06-12 20:02:04,013 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 20:02:04,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:04,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:04,081 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 20:02:04,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,084 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 19 treesize of output 15 [2021-06-12 20:02:04,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,087 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 19 treesize of output 15 [2021-06-12 20:02:04,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,090 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 19 treesize of output 15 [2021-06-12 20:02:04,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:04,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-12 20:02:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,333 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 20:02:04,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,337 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 20 treesize of output 16 [2021-06-12 20:02:04,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,514 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-12 20:02:04,515 INFO L628 ElimStorePlain]: treesize reduction 158, result has 56.6 percent of original size [2021-06-12 20:02:04,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,518 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 7 [2021-06-12 20:02:04,519 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:04,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:04,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,593 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 20:02:04,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:04,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:04,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:02:04,668 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:04,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1131 vanished before elimination [2021-06-12 20:02:04,735 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 11 treesize of output 9 [2021-06-12 20:02:04,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:04,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,801 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 13 treesize of output 9 [2021-06-12 20:02:04,803 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:04,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:04,806 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 11 treesize of output 7 [2021-06-12 20:02:04,807 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:04,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:04,865 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1128 vanished before elimination [2021-06-12 20:02:04,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:02:04,867 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-12 20:02:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:05,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678224027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:05,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:05,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:05,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794889693] [2021-06-12 20:02:05,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:05,008 INFO L87 Difference]: Start difference. First operand 1149 states and 3691 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:06,218 INFO L93 Difference]: Finished difference Result 1954 states and 5965 transitions. [2021-06-12 20:02:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:02:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:06,220 INFO L225 Difference]: With dead ends: 1954 [2021-06-12 20:02:06,220 INFO L226 Difference]: Without dead ends: 1805 [2021-06-12 20:02:06,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1210.2ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:02:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-06-12 20:02:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1150. [2021-06-12 20:02:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.217580504786771) internal successors, (3697), 1149 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3697 transitions. [2021-06-12 20:02:06,234 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3697 transitions. Word has length 24 [2021-06-12 20:02:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:06,234 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3697 transitions. [2021-06-12 20:02:06,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3697 transitions. [2021-06-12 20:02:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:06,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:06,235 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:06,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:06,436 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 82242856, now seen corresponding path program 305 times [2021-06-12 20:02:06,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:06,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359359403] [2021-06-12 20:02:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:06,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359359403] [2021-06-12 20:02:06,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359359403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406004238] [2021-06-12 20:02:06,601 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 20:02:06,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:06,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:06,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,746 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 18 treesize of output 14 [2021-06-12 20:02:06,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,769 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 20:02:06,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-12 20:02:06,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,856 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 19 treesize of output 15 [2021-06-12 20:02:06,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,859 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 19 treesize of output 15 [2021-06-12 20:02:06,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,889 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-12 20:02:06,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,891 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 11 treesize of output 7 [2021-06-12 20:02:06,892 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:06,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,901 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 20:02:06,902 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-12 20:02:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:06,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406004238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:06,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:06,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418538455] [2021-06-12 20:02:06,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:06,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:06,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:06,933 INFO L87 Difference]: Start difference. First operand 1150 states and 3697 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 20:02:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:07,128 INFO L93 Difference]: Finished difference Result 1254 states and 3949 transitions. [2021-06-12 20:02:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:07,128 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 24 [2021-06-12 20:02:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:07,130 INFO L225 Difference]: With dead ends: 1254 [2021-06-12 20:02:07,130 INFO L226 Difference]: Without dead ends: 1195 [2021-06-12 20:02:07,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-12 20:02:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1152. [2021-06-12 20:02:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.2180712423979148) internal successors, (3704), 1151 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3704 transitions. [2021-06-12 20:02:07,140 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3704 transitions. Word has length 24 [2021-06-12 20:02:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:07,140 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 3704 transitions. [2021-06-12 20:02:07,140 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 20:02:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3704 transitions. [2021-06-12 20:02:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:07,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:07,142 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:07,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2452 [2021-06-12 20:02:07,342 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:07,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1655728960, now seen corresponding path program 306 times [2021-06-12 20:02:07,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:07,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012447895] [2021-06-12 20:02:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:07,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:07,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012447895] [2021-06-12 20:02:07,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012447895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069136303] [2021-06-12 20:02:07,520 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 20:02:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:07,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,663 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 18 treesize of output 14 [2021-06-12 20:02:07,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,666 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 20:02:07,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:07,689 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 2 xjuncts. [2021-06-12 20:02:07,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-12 20:02:07,743 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:07,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,747 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 20:02:07,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,751 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 19 treesize of output 15 [2021-06-12 20:02:07,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,754 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 20 treesize of output 16 [2021-06-12 20:02:07,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,758 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 20 treesize of output 16 [2021-06-12 20:02:07,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:07,858 INFO L628 ElimStorePlain]: treesize reduction 58, result has 65.7 percent of original size [2021-06-12 20:02:07,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,861 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 11 treesize of output 7 [2021-06-12 20:02:07,862 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:07,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:07,865 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 12 treesize of output 8 [2021-06-12 20:02:07,866 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:07,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:07,905 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 20:02:07,905 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:47 [2021-06-12 20:02:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:07,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069136303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:07,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735676575] [2021-06-12 20:02:07,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:07,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:07,980 INFO L87 Difference]: Start difference. First operand 1152 states and 3704 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:08,178 INFO L93 Difference]: Finished difference Result 1246 states and 3927 transitions. [2021-06-12 20:02:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:08,179 INFO L225 Difference]: With dead ends: 1246 [2021-06-12 20:02:08,179 INFO L226 Difference]: Without dead ends: 1197 [2021-06-12 20:02:08,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-12 20:02:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1154. [2021-06-12 20:02:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.2168256721595836) internal successors, (3709), 1153 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 3709 transitions. [2021-06-12 20:02:08,190 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 3709 transitions. Word has length 24 [2021-06-12 20:02:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:08,190 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 3709 transitions. [2021-06-12 20:02:08,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 3709 transitions. [2021-06-12 20:02:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:08,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:08,192 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:08,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2458 [2021-06-12 20:02:08,392 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2101745480, now seen corresponding path program 307 times [2021-06-12 20:02:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:08,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288862183] [2021-06-12 20:02:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:08,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288862183] [2021-06-12 20:02:08,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288862183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685409585] [2021-06-12 20:02:08,565 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 20:02:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:08,666 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 27 treesize of output 21 [2021-06-12 20:02:08,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:08,674 INFO 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 20:02:08,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-06-12 20:02:08,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,707 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 20 treesize of output 16 [2021-06-12 20:02:08,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,710 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 20:02:08,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,729 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 13 treesize of output 9 [2021-06-12 20:02:08,731 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:08,734 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:08,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:08,758 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 20:02:08,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-12 20:02:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:08,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685409585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:08,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646506689] [2021-06-12 20:02:08,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:08,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:08,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:08,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:08,821 INFO L87 Difference]: Start difference. First operand 1154 states and 3709 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:09,089 INFO L93 Difference]: Finished difference Result 1250 states and 3953 transitions. [2021-06-12 20:02:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:09,091 INFO L225 Difference]: With dead ends: 1250 [2021-06-12 20:02:09,091 INFO L226 Difference]: Without dead ends: 1211 [2021-06-12 20:02:09,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-06-12 20:02:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1154. [2021-06-12 20:02:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.2168256721595836) internal successors, (3709), 1153 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 3709 transitions. [2021-06-12 20:02:09,102 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 3709 transitions. Word has length 24 [2021-06-12 20:02:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:09,102 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 3709 transitions. [2021-06-12 20:02:09,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 3709 transitions. [2021-06-12 20:02:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:09,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:09,103 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:09,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2466 [2021-06-12 20:02:09,303 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:09,304 INFO L82 PathProgramCache]: Analyzing trace with hash -806459446, now seen corresponding path program 308 times [2021-06-12 20:02:09,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:09,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373555212] [2021-06-12 20:02:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:09,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:09,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373555212] [2021-06-12 20:02:09,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373555212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058292902] [2021-06-12 20:02:09,451 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 20:02:09,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:09,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:09,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,555 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 18 treesize of output 14 [2021-06-12 20:02:09,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:09,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,621 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 17 treesize of output 13 [2021-06-12 20:02:09,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,624 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 18 treesize of output 14 [2021-06-12 20:02:09,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:09,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:09,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,871 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 20:02:09,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,882 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 7 [2021-06-12 20:02:09,883 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:09,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,891 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 20:02:09,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-12 20:02:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:09,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058292902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:09,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176815515] [2021-06-12 20:02:09,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:09,926 INFO L87 Difference]: Start difference. First operand 1154 states and 3709 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:10,401 INFO L93 Difference]: Finished difference Result 1329 states and 4157 transitions. [2021-06-12 20:02:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:10,403 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 20:02:10,403 INFO L226 Difference]: Without dead ends: 1271 [2021-06-12 20:02:10,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-12 20:02:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1169. [2021-06-12 20:02:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.216609589041096) internal successors, (3757), 1168 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3757 transitions. [2021-06-12 20:02:10,415 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3757 transitions. Word has length 24 [2021-06-12 20:02:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:10,415 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3757 transitions. [2021-06-12 20:02:10,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3757 transitions. [2021-06-12 20:02:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:10,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:10,417 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:10,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2471,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:10,617 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1750536034, now seen corresponding path program 309 times [2021-06-12 20:02:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:10,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337232809] [2021-06-12 20:02:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:10,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:10,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337232809] [2021-06-12 20:02:10,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337232809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:10,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755967487] [2021-06-12 20:02:10,795 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 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 20:02:10,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:10,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:10,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,897 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 18 treesize of output 14 [2021-06-12 20:02:10,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,900 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 17 treesize of output 13 [2021-06-12 20:02:10,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:10,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,963 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 17 treesize of output 13 [2021-06-12 20:02:10,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,966 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 18 treesize of output 14 [2021-06-12 20:02:10,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:11,024 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:11,173 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,176 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 27 treesize of output 21 [2021-06-12 20:02:11,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,180 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 20 treesize of output 16 [2021-06-12 20:02:11,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,205 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 12 treesize of output 8 [2021-06-12 20:02:11,206 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:11,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,208 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 7 [2021-06-12 20:02:11,209 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:11,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,230 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 20:02:11,230 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:27 [2021-06-12 20:02:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:11,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755967487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:11,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179406743] [2021-06-12 20:02:11,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:11,305 INFO L87 Difference]: Start difference. First operand 1169 states and 3757 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:11,708 INFO L93 Difference]: Finished difference Result 1467 states and 4526 transitions. [2021-06-12 20:02:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:11,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:11,710 INFO L225 Difference]: With dead ends: 1467 [2021-06-12 20:02:11,710 INFO L226 Difference]: Without dead ends: 1405 [2021-06-12 20:02:11,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-12 20:02:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1167. [2021-06-12 20:02:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.2178387650085765) internal successors, (3752), 1166 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3752 transitions. [2021-06-12 20:02:11,723 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3752 transitions. Word has length 24 [2021-06-12 20:02:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:11,723 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 3752 transitions. [2021-06-12 20:02:11,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3752 transitions. [2021-06-12 20:02:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:11,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:11,724 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:11,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2478 [2021-06-12 20:02:11,925 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1256782248, now seen corresponding path program 310 times [2021-06-12 20:02:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:11,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701770960] [2021-06-12 20:02:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:12,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:12,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701770960] [2021-06-12 20:02:12,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701770960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833474207] [2021-06-12 20:02:12,067 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 20:02:12,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:12,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:12,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:12,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,172 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 18 treesize of output 14 [2021-06-12 20:02:12,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,242 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 17 treesize of output 13 [2021-06-12 20:02:12,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,245 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 18 treesize of output 14 [2021-06-12 20:02:12,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:12,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:12,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:12,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,453 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 11 treesize of output 7 [2021-06-12 20:02:12,454 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:12,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,463 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 20:02:12,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-12 20:02:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833474207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:12,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:02:12,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830597802] [2021-06-12 20:02:12,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:12,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:12,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:12,488 INFO L87 Difference]: Start difference. First operand 1167 states and 3752 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 20:02:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:12,690 INFO L93 Difference]: Finished difference Result 1302 states and 4093 transitions. [2021-06-12 20:02:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:12,691 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 24 [2021-06-12 20:02:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:12,692 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 20:02:12,692 INFO L226 Difference]: Without dead ends: 1271 [2021-06-12 20:02:12,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-12 20:02:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1162. [2021-06-12 20:02:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.2222222222222223) internal successors, (3741), 1161 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3741 transitions. [2021-06-12 20:02:12,704 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3741 transitions. Word has length 24 [2021-06-12 20:02:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:12,704 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3741 transitions. [2021-06-12 20:02:12,704 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 20:02:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3741 transitions. [2021-06-12 20:02:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:12,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:12,705 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:12,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:12,906 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -63804470, now seen corresponding path program 311 times [2021-06-12 20:02:12,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:12,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995954716] [2021-06-12 20:02:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:13,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995954716] [2021-06-12 20:02:13,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995954716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123817294] [2021-06-12 20:02:13,084 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 20:02:13,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:02:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:13,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,194 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 18 treesize of output 14 [2021-06-12 20:02:13,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,197 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 17 treesize of output 13 [2021-06-12 20:02:13,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,260 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 20:02:13,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,263 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 18 treesize of output 14 [2021-06-12 20:02:13,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:13,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:13,486 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:13,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,490 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 19 treesize of output 15 [2021-06-12 20:02:13,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,493 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 19 treesize of output 15 [2021-06-12 20:02:13,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,521 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 11 treesize of output 7 [2021-06-12 20:02:13,522 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:13,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,524 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 7 [2021-06-12 20:02:13,525 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:13,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:13,549 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 20:02:13,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-06-12 20:02:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123817294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:13,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:13,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007129970] [2021-06-12 20:02:13,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:13,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:13,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:13,614 INFO L87 Difference]: Start difference. First operand 1162 states and 3741 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:14,037 INFO L93 Difference]: Finished difference Result 1400 states and 4363 transitions. [2021-06-12 20:02:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:14,039 INFO L225 Difference]: With dead ends: 1400 [2021-06-12 20:02:14,039 INFO L226 Difference]: Without dead ends: 1323 [2021-06-12 20:02:14,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-12 20:02:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1155. [2021-06-12 20:02:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.2175043327556327) internal successors, (3713), 1154 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3713 transitions. [2021-06-12 20:02:14,051 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3713 transitions. Word has length 24 [2021-06-12 20:02:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:14,051 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 3713 transitions. [2021-06-12 20:02:14,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3713 transitions. [2021-06-12 20:02:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:14,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:14,052 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:14,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2494,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:14,252 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash -237696640, now seen corresponding path program 312 times [2021-06-12 20:02:14,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:14,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038042833] [2021-06-12 20:02:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:14,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038042833] [2021-06-12 20:02:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038042833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378393033] [2021-06-12 20:02:14,455 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 20:02:14,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:14,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:02:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:14,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,542 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 17 treesize of output 13 [2021-06-12 20:02:14,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,544 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 18 treesize of output 14 [2021-06-12 20:02:14,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,568 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 20:02:14,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-12 20:02:14,630 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:14,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,633 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 19 treesize of output 15 [2021-06-12 20:02:14,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,637 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 20 treesize of output 16 [2021-06-12 20:02:14,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,641 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 19 treesize of output 15 [2021-06-12 20:02:14,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:14,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,711 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 8 [2021-06-12 20:02:14,712 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,716 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 11 treesize of output 7 [2021-06-12 20:02:14,717 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,720 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 7 [2021-06-12 20:02:14,721 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:14,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,724 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 12 treesize of output 8 [2021-06-12 20:02:14,725 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:14,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,783 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 20:02:14,783 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:69 [2021-06-12 20:02:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:14,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378393033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:14,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:14,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324557493] [2021-06-12 20:02:14,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:14,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:14,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:14,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:14,931 INFO L87 Difference]: Start difference. First operand 1155 states and 3713 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:15,441 INFO L93 Difference]: Finished difference Result 1406 states and 4395 transitions. [2021-06-12 20:02:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:15,443 INFO L225 Difference]: With dead ends: 1406 [2021-06-12 20:02:15,443 INFO L226 Difference]: Without dead ends: 1340 [2021-06-12 20:02:15,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-12 20:02:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1155. [2021-06-12 20:02:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.2175043327556327) internal successors, (3713), 1154 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3713 transitions. [2021-06-12 20:02:15,456 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3713 transitions. Word has length 24 [2021-06-12 20:02:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:15,456 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 3713 transitions. [2021-06-12 20:02:15,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3713 transitions. [2021-06-12 20:02:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:15,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:15,457 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:15,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2502,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:15,658 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash 596074730, now seen corresponding path program 313 times [2021-06-12 20:02:15,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:15,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529788226] [2021-06-12 20:02:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:15,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:15,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529788226] [2021-06-12 20:02:15,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529788226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:15,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469353225] [2021-06-12 20:02:15,866 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 20:02:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:15,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:15,947 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 19 treesize of output 15 [2021-06-12 20:02:15,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,950 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 19 treesize of output 15 [2021-06-12 20:02:15,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,954 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 20:02:15,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,957 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 20:02:15,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:16,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:02:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,183 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 29 treesize of output 23 [2021-06-12 20:02:16,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,186 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 30 treesize of output 24 [2021-06-12 20:02:16,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,268 INFO L628 ElimStorePlain]: treesize reduction 59, result has 63.8 percent of original size [2021-06-12 20:02:16,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,272 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 7 [2021-06-12 20:02:16,273 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:16,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,275 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 12 treesize of output 8 [2021-06-12 20:02:16,276 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:16,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,309 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 22 treesize of output 18 [2021-06-12 20:02:16,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,340 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 10 treesize of output 6 [2021-06-12 20:02:16,341 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:16,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:16,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:16,371 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-06-12 20:02:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469353225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:16,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595330128] [2021-06-12 20:02:16,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:16,447 INFO L87 Difference]: Start difference. First operand 1155 states and 3713 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:16,882 INFO L93 Difference]: Finished difference Result 1312 states and 4151 transitions. [2021-06-12 20:02:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:16,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:16,884 INFO L225 Difference]: With dead ends: 1312 [2021-06-12 20:02:16,884 INFO L226 Difference]: Without dead ends: 1259 [2021-06-12 20:02:16,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-12 20:02:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1158. [2021-06-12 20:02:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.2178046672428695) internal successors, (3723), 1157 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3723 transitions. [2021-06-12 20:02:16,895 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3723 transitions. Word has length 24 [2021-06-12 20:02:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:16,895 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3723 transitions. [2021-06-12 20:02:16,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3723 transitions. [2021-06-12 20:02:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:16,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:16,896 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:17,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-06-12 20:02:17,097 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1372255736, now seen corresponding path program 314 times [2021-06-12 20:02:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:17,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883321286] [2021-06-12 20:02:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:17,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:17,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883321286] [2021-06-12 20:02:17,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883321286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303414419] [2021-06-12 20:02:17,318 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 20:02:17,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [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 20:02:17,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,401 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 19 treesize of output 15 [2021-06-12 20:02:17,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,426 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 20:02:17,426 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:02:17,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,489 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 20 treesize of output 16 [2021-06-12 20:02:17,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,492 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 20:02:17,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,547 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 13 treesize of output 9 [2021-06-12 20:02:17,548 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:17,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,551 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 11 treesize of output 7 [2021-06-12 20:02:17,552 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:17,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,605 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 20:02:17,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,608 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 20 treesize of output 16 [2021-06-12 20:02:17,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,657 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 11 treesize of output 7 [2021-06-12 20:02:17,658 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,661 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 13 treesize of output 9 [2021-06-12 20:02:17,662 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:17,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:17,707 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:02:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:17,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303414419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:17,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162406714] [2021-06-12 20:02:17,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:17,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:17,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:17,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:17,820 INFO L87 Difference]: Start difference. First operand 1158 states and 3723 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:18,387 INFO L93 Difference]: Finished difference Result 1410 states and 4363 transitions. [2021-06-12 20:02:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:18,389 INFO L225 Difference]: With dead ends: 1410 [2021-06-12 20:02:18,389 INFO L226 Difference]: Without dead ends: 1348 [2021-06-12 20:02:18,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 700.6ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-12 20:02:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1161. [2021-06-12 20:02:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 3.218103448275862) internal successors, (3733), 1160 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 3733 transitions. [2021-06-12 20:02:18,402 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 3733 transitions. Word has length 24 [2021-06-12 20:02:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:18,402 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 3733 transitions. [2021-06-12 20:02:18,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 3733 transitions. [2021-06-12 20:02:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:18,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:18,403 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:18,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-06-12 20:02:18,604 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:18,604 INFO L82 PathProgramCache]: Analyzing trace with hash 437129930, now seen corresponding path program 315 times [2021-06-12 20:02:18,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:18,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463430304] [2021-06-12 20:02:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:18,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463430304] [2021-06-12 20:02:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463430304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791882309] [2021-06-12 20:02:18,749 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 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 20:02:18,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:18,821 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 20:02:18,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,824 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 20:02:18,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:18,849 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 20:02:18,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:02:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,919 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 20 treesize of output 16 [2021-06-12 20:02:18,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:18,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,977 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 20:02:18,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,981 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 20 treesize of output 16 [2021-06-12 20:02:18,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,031 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 13 treesize of output 9 [2021-06-12 20:02:19,032 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:19,035 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:19,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,084 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 13 treesize of output 9 [2021-06-12 20:02:19,085 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,088 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 11 treesize of output 7 [2021-06-12 20:02:19,089 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:19,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:19,134 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:02:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791882309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:19,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:19,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207725782] [2021-06-12 20:02:19,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:19,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:19,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:19,257 INFO L87 Difference]: Start difference. First operand 1161 states and 3733 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 20:02:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:19,766 INFO L93 Difference]: Finished difference Result 1316 states and 4143 transitions. [2021-06-12 20:02:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 24 [2021-06-12 20:02:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:19,768 INFO L225 Difference]: With dead ends: 1316 [2021-06-12 20:02:19,768 INFO L226 Difference]: Without dead ends: 1259 [2021-06-12 20:02:19,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-12 20:02:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1156. [2021-06-12 20:02:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 3.219047619047619) internal successors, (3718), 1155 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3718 transitions. [2021-06-12 20:02:19,779 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3718 transitions. Word has length 24 [2021-06-12 20:02:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:19,779 INFO L482 AbstractCegarLoop]: Abstraction has 1156 states and 3718 transitions. [2021-06-12 20:02:19,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 20:02:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3718 transitions. [2021-06-12 20:02:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:19,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:19,780 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:19,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2528,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:19,981 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 816727770, now seen corresponding path program 316 times [2021-06-12 20:02:19,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:19,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517726542] [2021-06-12 20:02:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:20,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517726542] [2021-06-12 20:02:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517726542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114756281] [2021-06-12 20:02:20,130 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 20:02:20,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,215 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 18 treesize of output 14 [2021-06-12 20:02:20,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,219 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 18 treesize of output 14 [2021-06-12 20:02:20,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,222 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 17 treesize of output 13 [2021-06-12 20:02:20,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,225 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 17 treesize of output 13 [2021-06-12 20:02:20,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:20,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:20,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:02:20,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,457 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 19 treesize of output 15 [2021-06-12 20:02:20,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,460 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 19 treesize of output 15 [2021-06-12 20:02:20,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,489 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-12 20:02:20,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,491 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 11 treesize of output 7 [2021-06-12 20:02:20,499 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:20,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:20,509 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 20:02:20,509 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-12 20:02:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:20,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114756281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:20,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:20,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639481956] [2021-06-12 20:02:20,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:20,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:20,543 INFO L87 Difference]: Start difference. First operand 1156 states and 3718 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:20,996 INFO L93 Difference]: Finished difference Result 1329 states and 4149 transitions. [2021-06-12 20:02:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:20,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:20,998 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 20:02:20,998 INFO L226 Difference]: Without dead ends: 1243 [2021-06-12 20:02:20,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-12 20:02:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1174. [2021-06-12 20:02:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.2199488491048593) internal successors, (3777), 1173 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3777 transitions. [2021-06-12 20:02:21,010 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3777 transitions. Word has length 24 [2021-06-12 20:02:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:21,010 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 3777 transitions. [2021-06-12 20:02:21,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3777 transitions. [2021-06-12 20:02:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:21,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:21,011 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:21,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2538 [2021-06-12 20:02:21,211 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:21,212 INFO L82 PathProgramCache]: Analyzing trace with hash -921244046, now seen corresponding path program 317 times [2021-06-12 20:02:21,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:21,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715199219] [2021-06-12 20:02:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:21,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715199219] [2021-06-12 20:02:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715199219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812541947] [2021-06-12 20:02:21,367 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 20:02:21,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:21,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:21,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:21,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,453 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 17 treesize of output 13 [2021-06-12 20:02:21,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,456 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 18 treesize of output 14 [2021-06-12 20:02:21,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,467 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 18 treesize of output 14 [2021-06-12 20:02:21,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:21,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:21,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:02:21,664 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,667 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 19 treesize of output 15 [2021-06-12 20:02:21,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,670 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 20 treesize of output 16 [2021-06-12 20:02:21,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,698 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 12 treesize of output 8 [2021-06-12 20:02:21,699 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:21,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,702 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 7 [2021-06-12 20:02:21,703 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:21,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,725 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 20:02:21,725 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-06-12 20:02:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:21,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812541947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:21,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:02:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816909627] [2021-06-12 20:02:21,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:21,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:21,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:21,774 INFO L87 Difference]: Start difference. First operand 1174 states and 3777 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 20:02:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:22,087 INFO L93 Difference]: Finished difference Result 1351 states and 4213 transitions. [2021-06-12 20:02:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:22,087 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 24 [2021-06-12 20:02:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:22,089 INFO L225 Difference]: With dead ends: 1351 [2021-06-12 20:02:22,089 INFO L226 Difference]: Without dead ends: 1304 [2021-06-12 20:02:22,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-12 20:02:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1168. [2021-06-12 20:02:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.223650385604113) internal successors, (3762), 1167 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3762 transitions. [2021-06-12 20:02:22,101 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3762 transitions. Word has length 24 [2021-06-12 20:02:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:22,101 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3762 transitions. [2021-06-12 20:02:22,101 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 20:02:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3762 transitions. [2021-06-12 20:02:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:22,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:22,103 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:22,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2545 [2021-06-12 20:02:22,303 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -701948070, now seen corresponding path program 318 times [2021-06-12 20:02:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:22,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70029142] [2021-06-12 20:02:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:02:22,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:22,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70029142] [2021-06-12 20:02:22,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70029142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864628683] [2021-06-12 20:02:22,453 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 20:02:22,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:02:22,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:22,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:22,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,544 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 17 treesize of output 13 [2021-06-12 20:02:22,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:22,567 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 20:02:22,567 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:02:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,681 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 20:02:22,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,684 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 19 treesize of output 15 [2021-06-12 20:02:22,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:22,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,712 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 7 [2021-06-12 20:02:22,713 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:22,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,715 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 7 [2021-06-12 20:02:22,716 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:22,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:22,739 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 20:02:22,739 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 20:02:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:02:22,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864628683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:22,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:22,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090463763] [2021-06-12 20:02:22,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:22,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:22,786 INFO L87 Difference]: Start difference. First operand 1168 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:23,203 INFO L93 Difference]: Finished difference Result 1349 states and 4240 transitions. [2021-06-12 20:02:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:23,205 INFO L225 Difference]: With dead ends: 1349 [2021-06-12 20:02:23,205 INFO L226 Difference]: Without dead ends: 1266 [2021-06-12 20:02:23,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-06-12 20:02:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1175. [2021-06-12 20:02:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.2223168654173766) internal successors, (3783), 1174 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3783 transitions. [2021-06-12 20:02:23,216 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3783 transitions. Word has length 24 [2021-06-12 20:02:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:23,216 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 3783 transitions. [2021-06-12 20:02:23,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3783 transitions. [2021-06-12 20:02:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:23,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:23,217 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:23,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-06-12 20:02:23,417 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1559382746, now seen corresponding path program 319 times [2021-06-12 20:02:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:23,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129162031] [2021-06-12 20:02:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:23,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:23,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129162031] [2021-06-12 20:02:23,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129162031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997691711] [2021-06-12 20:02:23,642 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 20:02:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:23,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,726 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 17 treesize of output 13 [2021-06-12 20:02:23,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,730 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 18 treesize of output 14 [2021-06-12 20:02:23,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:23,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,736 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 17 treesize of output 13 [2021-06-12 20:02:23,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:23,783 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:02:23,958 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,961 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 19 treesize of output 15 [2021-06-12 20:02:23,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,964 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 19 treesize of output 15 [2021-06-12 20:02:23,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,994 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 7 [2021-06-12 20:02:23,995 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,997 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 11 treesize of output 7 [2021-06-12 20:02:23,998 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:24,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,023 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 20:02:24,024 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-12 20:02:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:24,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997691711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:24,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:24,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732612348] [2021-06-12 20:02:24,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:24,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:24,085 INFO L87 Difference]: Start difference. First operand 1175 states and 3783 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:24,350 INFO L93 Difference]: Finished difference Result 1381 states and 4357 transitions. [2021-06-12 20:02:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:24,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:24,352 INFO L225 Difference]: With dead ends: 1381 [2021-06-12 20:02:24,352 INFO L226 Difference]: Without dead ends: 1323 [2021-06-12 20:02:24,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-12 20:02:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1168. [2021-06-12 20:02:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.223650385604113) internal successors, (3762), 1167 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3762 transitions. [2021-06-12 20:02:24,364 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3762 transitions. Word has length 24 [2021-06-12 20:02:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:24,364 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3762 transitions. [2021-06-12 20:02:24,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3762 transitions. [2021-06-12 20:02:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:24,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:24,365 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:24,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2562 [2021-06-12 20:02:24,566 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1385490576, now seen corresponding path program 320 times [2021-06-12 20:02:24,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:24,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340297049] [2021-06-12 20:02:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:24,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340297049] [2021-06-12 20:02:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340297049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37935685] [2021-06-12 20:02:24,677 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 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 20:02:24,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:24,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:24,737 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 17 treesize of output 13 [2021-06-12 20:02:24,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,739 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 18 treesize of output 14 [2021-06-12 20:02:24,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,742 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 18 treesize of output 14 [2021-06-12 20:02:24,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:24,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:24,774 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-12 20:02:24,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:24,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,869 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 20 treesize of output 16 [2021-06-12 20:02:24,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,904 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 11 treesize of output 7 [2021-06-12 20:02:24,905 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:24,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,940 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 13 treesize of output 9 [2021-06-12 20:02:24,941 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:24,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:24,974 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 20 treesize of output 16 [2021-06-12 20:02:24,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,016 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 13 treesize of output 9 [2021-06-12 20:02:25,017 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:25,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,049 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 20:02:25,050 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,079 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 12 treesize of output 8 [2021-06-12 20:02:25,080 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:25,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:25,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:25,109 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:129, output treesize:69 [2021-06-12 20:02:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:25,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37935685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:25,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:25,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009275699] [2021-06-12 20:02:25,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:25,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:25,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:25,211 INFO L87 Difference]: Start difference. First operand 1168 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:02:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:25,535 INFO L93 Difference]: Finished difference Result 1489 states and 4601 transitions. [2021-06-12 20:02:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:25,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 24 [2021-06-12 20:02:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:25,537 INFO L225 Difference]: With dead ends: 1489 [2021-06-12 20:02:25,537 INFO L226 Difference]: Without dead ends: 1415 [2021-06-12 20:02:25,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-12 20:02:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-06-12 20:02:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2320819112627985) internal successors, (3788), 1172 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3788 transitions. [2021-06-12 20:02:25,555 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3788 transitions. Word has length 24 [2021-06-12 20:02:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:25,555 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3788 transitions. [2021-06-12 20:02:25,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:02:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3788 transitions. [2021-06-12 20:02:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:25,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:25,556 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:25,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2569,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:25,757 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash 505217040, now seen corresponding path program 321 times [2021-06-12 20:02:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:25,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030100874] [2021-06-12 20:02:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:02:25,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030100874] [2021-06-12 20:02:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030100874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085708728] [2021-06-12 20:02:25,954 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 20:02:25,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,041 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 18 treesize of output 14 [2021-06-12 20:02:26,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:26,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,066 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 20:02:26,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:02:26,120 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:26,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,124 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 20:02:26,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,128 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 20:02:26,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,131 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 20 treesize of output 16 [2021-06-12 20:02:26,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,135 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 20 treesize of output 16 [2021-06-12 20:02:26,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,197 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 11 treesize of output 7 [2021-06-12 20:02:26,198 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:02:26,203 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:26,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:02:26,207 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:26,211 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:26,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:26,267 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 20:02:26,267 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-06-12 20:02:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:02:26,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085708728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:26,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:26,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115864621] [2021-06-12 20:02:26,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:26,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:26,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:26,401 INFO L87 Difference]: Start difference. First operand 1173 states and 3788 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:26,823 INFO L93 Difference]: Finished difference Result 1533 states and 4740 transitions. [2021-06-12 20:02:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:26,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:26,825 INFO L225 Difference]: With dead ends: 1533 [2021-06-12 20:02:26,825 INFO L226 Difference]: Without dead ends: 1476 [2021-06-12 20:02:26,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-06-12 20:02:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1173. [2021-06-12 20:02:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2329351535836177) internal successors, (3789), 1172 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3789 transitions. [2021-06-12 20:02:26,838 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3789 transitions. Word has length 24 [2021-06-12 20:02:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:26,838 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3789 transitions. [2021-06-12 20:02:26,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3789 transitions. [2021-06-12 20:02:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:26,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:26,840 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:27,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2575 [2021-06-12 20:02:27,040 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash 441641288, now seen corresponding path program 322 times [2021-06-12 20:02:27,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:27,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178365497] [2021-06-12 20:02:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:27,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:27,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178365497] [2021-06-12 20:02:27,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178365497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702072570] [2021-06-12 20:02:27,181 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 20:02:27,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:27,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:27,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,274 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 17 treesize of output 13 [2021-06-12 20:02:27,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,277 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 20:02:27,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,303 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 20:02:27,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-12 20:02:27,367 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:27,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,370 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 20:02:27,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,374 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 20:02:27,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,403 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 7 [2021-06-12 20:02:27,404 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:27,407 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:27,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,432 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 20:02:27,432 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-12 20:02:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:27,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702072570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:27,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:27,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623175890] [2021-06-12 20:02:27,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:27,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:27,512 INFO L87 Difference]: Start difference. First operand 1173 states and 3789 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:27,693 INFO L93 Difference]: Finished difference Result 1358 states and 4281 transitions. [2021-06-12 20:02:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:27,695 INFO L225 Difference]: With dead ends: 1358 [2021-06-12 20:02:27,695 INFO L226 Difference]: Without dead ends: 1320 [2021-06-12 20:02:27,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-06-12 20:02:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1165. [2021-06-12 20:02:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.218213058419244) internal successors, (3746), 1164 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3746 transitions. [2021-06-12 20:02:27,707 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3746 transitions. Word has length 24 [2021-06-12 20:02:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:27,708 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3746 transitions. [2021-06-12 20:02:27,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3746 transitions. [2021-06-12 20:02:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:27,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:27,709 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:27,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-12 20:02:27,909 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1888845170, now seen corresponding path program 323 times [2021-06-12 20:02:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:27,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190347886] [2021-06-12 20:02:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:28,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190347886] [2021-06-12 20:02:28,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190347886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51312137] [2021-06-12 20:02:28,032 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 20:02:28,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:28,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:28,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:28,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:28,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,131 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 17 treesize of output 13 [2021-06-12 20:02:28,132 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 20:02:28,139 INFO 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 20:02:28,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:02:28,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,166 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 19 treesize of output 15 [2021-06-12 20:02:28,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:28,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,216 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 11 treesize of output 7 [2021-06-12 20:02:28,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:28,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,220 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 7 [2021-06-12 20:02:28,221 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:28,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:28,247 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 20:02:28,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-06-12 20:02:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:28,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51312137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:28,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:28,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405546478] [2021-06-12 20:02:28,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:28,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:28,305 INFO L87 Difference]: Start difference. First operand 1165 states and 3746 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 20:02:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:28,610 INFO L93 Difference]: Finished difference Result 1337 states and 4264 transitions. [2021-06-12 20:02:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:28,610 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 24 [2021-06-12 20:02:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:28,612 INFO L225 Difference]: With dead ends: 1337 [2021-06-12 20:02:28,612 INFO L226 Difference]: Without dead ends: 1291 [2021-06-12 20:02:28,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-12 20:02:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1162. [2021-06-12 20:02:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.2196382428940566) internal successors, (3738), 1161 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3738 transitions. [2021-06-12 20:02:28,624 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3738 transitions. Word has length 24 [2021-06-12 20:02:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:28,624 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3738 transitions. [2021-06-12 20:02:28,624 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 20:02:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3738 transitions. [2021-06-12 20:02:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:28,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:28,625 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:28,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2591 [2021-06-12 20:02:28,826 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1774917624, now seen corresponding path program 324 times [2021-06-12 20:02:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383783188] [2021-06-12 20:02:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:29,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383783188] [2021-06-12 20:02:29,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383783188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931582109] [2021-06-12 20:02:29,016 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 20:02:29,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:29,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,112 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 18 treesize of output 14 [2021-06-12 20:02:29,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:29,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,118 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 20:02:29,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:29,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:02:29,269 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-12 20:02:29,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:29,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,277 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 20 treesize of output 16 [2021-06-12 20:02:29,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:29,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,285 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 20 treesize of output 16 [2021-06-12 20:02:29,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:02:29,343 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:02:29,348 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,351 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 11 treesize of output 7 [2021-06-12 20:02:29,352 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,355 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 7 [2021-06-12 20:02:29,356 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:29,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:29,407 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:193, output treesize:69 [2021-06-12 20:02:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:29,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931582109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:29,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:29,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566510759] [2021-06-12 20:02:29,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:29,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:29,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:29,545 INFO L87 Difference]: Start difference. First operand 1162 states and 3738 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:30,158 INFO L93 Difference]: Finished difference Result 1601 states and 4953 transitions. [2021-06-12 20:02:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:02:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:30,160 INFO L225 Difference]: With dead ends: 1601 [2021-06-12 20:02:30,160 INFO L226 Difference]: Without dead ends: 1508 [2021-06-12 20:02:30,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-06-12 20:02:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1173. [2021-06-12 20:02:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2295221843003414) internal successors, (3785), 1172 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3785 transitions. [2021-06-12 20:02:30,173 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3785 transitions. Word has length 24 [2021-06-12 20:02:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:30,173 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3785 transitions. [2021-06-12 20:02:30,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3785 transitions. [2021-06-12 20:02:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:30,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:30,175 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:30,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:30,375 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1000713254, now seen corresponding path program 325 times [2021-06-12 20:02:30,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:30,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586628645] [2021-06-12 20:02:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:30,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:30,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586628645] [2021-06-12 20:02:30,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586628645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:30,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777059452] [2021-06-12 20:02:30,536 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 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 20:02:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:30,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,620 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 18 treesize of output 14 [2021-06-12 20:02:30,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,624 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 20:02:30,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,627 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 18 treesize of output 14 [2021-06-12 20:02:30,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,630 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 17 treesize of output 13 [2021-06-12 20:02:30,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:30,679 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:02:30,818 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-12 20:02:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,821 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 19 treesize of output 15 [2021-06-12 20:02:30,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,825 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 20:02:30,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,829 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 20:02:30,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,832 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 19 treesize of output 15 [2021-06-12 20:02:30,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,903 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-06-12 20:02:30,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,906 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 11 treesize of output 7 [2021-06-12 20:02:30,907 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,910 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 11 treesize of output 7 [2021-06-12 20:02:30,911 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:30,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:30,938 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 20:02:30,938 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:34 [2021-06-12 20:02:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:31,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777059452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:31,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:31,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268369124] [2021-06-12 20:02:31,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:31,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:31,012 INFO L87 Difference]: Start difference. First operand 1173 states and 3785 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:31,579 INFO L93 Difference]: Finished difference Result 1621 states and 4994 transitions. [2021-06-12 20:02:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:02:31,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:31,581 INFO L225 Difference]: With dead ends: 1621 [2021-06-12 20:02:31,581 INFO L226 Difference]: Without dead ends: 1487 [2021-06-12 20:02:31,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-12 20:02:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1162. [2021-06-12 20:02:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.2196382428940566) internal successors, (3738), 1161 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3738 transitions. [2021-06-12 20:02:31,595 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3738 transitions. Word has length 24 [2021-06-12 20:02:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:31,595 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3738 transitions. [2021-06-12 20:02:31,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3738 transitions. [2021-06-12 20:02:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:31,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:31,596 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:31,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2603 [2021-06-12 20:02:31,796 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1407668338, now seen corresponding path program 326 times [2021-06-12 20:02:31,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:31,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392037415] [2021-06-12 20:02:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:31,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392037415] [2021-06-12 20:02:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392037415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096759847] [2021-06-12 20:02:31,982 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 20:02:32,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:32,063 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 19 treesize of output 15 [2021-06-12 20:02:32,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,066 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 20:02:32,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,091 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 20:02:32,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:02:32,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,223 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 20 treesize of output 16 [2021-06-12 20:02:32,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,228 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 19 treesize of output 15 [2021-06-12 20:02:32,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,276 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 13 treesize of output 9 [2021-06-12 20:02:32,284 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:32,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,287 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 11 treesize of output 7 [2021-06-12 20:02:32,288 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:32,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,335 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 19 treesize of output 15 [2021-06-12 20:02:32,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,339 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 20 treesize of output 16 [2021-06-12 20:02:32,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,381 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 11 treesize of output 7 [2021-06-12 20:02:32,382 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,385 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 13 treesize of output 9 [2021-06-12 20:02:32,386 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:32,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:32,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:32,424 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-06-12 20:02:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:32,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096759847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:32,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:32,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927170783] [2021-06-12 20:02:32,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:32,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:32,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:32,518 INFO L87 Difference]: Start difference. First operand 1162 states and 3738 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:32,933 INFO L93 Difference]: Finished difference Result 1330 states and 4198 transitions. [2021-06-12 20:02:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:32,934 INFO L225 Difference]: With dead ends: 1330 [2021-06-12 20:02:32,934 INFO L226 Difference]: Without dead ends: 1260 [2021-06-12 20:02:32,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-12 20:02:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1168. [2021-06-12 20:02:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.2193658954584405) internal successors, (3757), 1167 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3757 transitions. [2021-06-12 20:02:32,946 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3757 transitions. Word has length 24 [2021-06-12 20:02:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:32,946 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3757 transitions. [2021-06-12 20:02:32,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3757 transitions. [2021-06-12 20:02:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:32,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:32,947 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:33,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2610 [2021-06-12 20:02:33,147 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash -560662128, now seen corresponding path program 327 times [2021-06-12 20:02:33,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:33,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736750125] [2021-06-12 20:02:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:33,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:33,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736750125] [2021-06-12 20:02:33,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736750125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888797960] [2021-06-12 20:02:33,369 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 20:02:33,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:33,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:33,450 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 20:02:33,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,453 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 20:02:33,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,478 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 20:02:33,478 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:02:33,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,542 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 19 treesize of output 15 [2021-06-12 20:02:33,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,545 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 20 treesize of output 16 [2021-06-12 20:02:33,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:02:33,601 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:33,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,604 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 13 treesize of output 9 [2021-06-12 20:02:33,605 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:33,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,658 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 20:02:33,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,661 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 20 treesize of output 16 [2021-06-12 20:02:33,662 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,711 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 13 treesize of output 9 [2021-06-12 20:02:33,712 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,714 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 12 treesize of output 8 [2021-06-12 20:02:33,715 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:33,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:33,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:33,761 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:02:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:33,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888797960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:33,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:33,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109329880] [2021-06-12 20:02:33,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:33,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:33,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:33,900 INFO L87 Difference]: Start difference. First operand 1168 states and 3757 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:34,278 INFO L93 Difference]: Finished difference Result 1342 states and 4226 transitions. [2021-06-12 20:02:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:34,279 INFO L225 Difference]: With dead ends: 1342 [2021-06-12 20:02:34,279 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 20:02:34,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 20:02:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1165. [2021-06-12 20:02:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.2190721649484537) internal successors, (3747), 1164 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3747 transitions. [2021-06-12 20:02:34,291 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3747 transitions. Word has length 24 [2021-06-12 20:02:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:34,291 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3747 transitions. [2021-06-12 20:02:34,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3747 transitions. [2021-06-12 20:02:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:34,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:34,292 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:34,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:34,494 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1708456064, now seen corresponding path program 328 times [2021-06-12 20:02:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:34,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961133432] [2021-06-12 20:02:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:34,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961133432] [2021-06-12 20:02:34,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961133432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052410321] [2021-06-12 20:02:34,698 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 20:02:34,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:34,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,801 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 18 treesize of output 14 [2021-06-12 20:02:34,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,805 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 20:02:34,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:34,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,860 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 18 treesize of output 14 [2021-06-12 20:02:34,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:34,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:34,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:34,922 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-12 20:02:35,020 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-12 20:02:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,024 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 20:02:35,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:35,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,032 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 19 treesize of output 15 [2021-06-12 20:02:35,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,036 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 20 treesize of output 16 [2021-06-12 20:02:35,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,090 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 11 treesize of output 7 [2021-06-12 20:02:35,091 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:35,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,096 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 12 treesize of output 8 [2021-06-12 20:02:35,097 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,101 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 7 [2021-06-12 20:02:35,103 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,106 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 12 treesize of output 8 [2021-06-12 20:02:35,107 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:35,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:35,155 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:189, output treesize:69 [2021-06-12 20:02:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:35,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052410321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:35,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:35,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166220498] [2021-06-12 20:02:35,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:35,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:35,304 INFO L87 Difference]: Start difference. First operand 1165 states and 3747 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:35,826 INFO L93 Difference]: Finished difference Result 1515 states and 4711 transitions. [2021-06-12 20:02:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:35,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:35,828 INFO L225 Difference]: With dead ends: 1515 [2021-06-12 20:02:35,828 INFO L226 Difference]: Without dead ends: 1422 [2021-06-12 20:02:35,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-12 20:02:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1176. [2021-06-12 20:02:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.228936170212766) internal successors, (3794), 1175 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3794 transitions. [2021-06-12 20:02:35,841 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3794 transitions. Word has length 24 [2021-06-12 20:02:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:35,841 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3794 transitions. [2021-06-12 20:02:35,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3794 transitions. [2021-06-12 20:02:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:35,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:35,842 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:36,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2639,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:36,043 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1812306862, now seen corresponding path program 329 times [2021-06-12 20:02:36,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:36,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113637662] [2021-06-12 20:02:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:36,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:36,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113637662] [2021-06-12 20:02:36,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113637662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697807301] [2021-06-12 20:02:36,288 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 20:02:36,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:36,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:36,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,370 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 18 treesize of output 14 [2021-06-12 20:02:36,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,373 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 20:02:36,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,393 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 20:02:36,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:57 [2021-06-12 20:02:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,455 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 20:02:36,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,458 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 20:02:36,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,487 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 7 [2021-06-12 20:02:36,488 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,491 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 11 treesize of output 7 [2021-06-12 20:02:36,492 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:36,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,515 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 20:02:36,515 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:91, output treesize:31 [2021-06-12 20:02:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697807301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401688462] [2021-06-12 20:02:36,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:36,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:36,591 INFO L87 Difference]: Start difference. First operand 1176 states and 3794 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:37,091 INFO L93 Difference]: Finished difference Result 1361 states and 4342 transitions. [2021-06-12 20:02:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:37,093 INFO L225 Difference]: With dead ends: 1361 [2021-06-12 20:02:37,093 INFO L226 Difference]: Without dead ends: 1315 [2021-06-12 20:02:37,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-12 20:02:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1163. [2021-06-12 20:02:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2203098106712567) internal successors, (3742), 1162 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3742 transitions. [2021-06-12 20:02:37,105 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3742 transitions. Word has length 24 [2021-06-12 20:02:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:37,105 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3742 transitions. [2021-06-12 20:02:37,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3742 transitions. [2021-06-12 20:02:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:37,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:37,106 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:37,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-06-12 20:02:37,307 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:37,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1068438328, now seen corresponding path program 330 times [2021-06-12 20:02:37,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:37,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516172871] [2021-06-12 20:02:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:37,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516172871] [2021-06-12 20:02:37,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516172871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:37,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360249081] [2021-06-12 20:02:37,483 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 20:02:37,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:02:37,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:37,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,559 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 19 treesize of output 15 [2021-06-12 20:02:37,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,562 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 19 treesize of output 15 [2021-06-12 20:02:37,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,585 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 20:02:37,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-06-12 20:02:37,744 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1199], 1=[o_2, v_prenex_1200]} [2021-06-12 20:02:37,747 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 20 treesize of output 16 [2021-06-12 20:02:37,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,749 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 19 treesize of output 15 [2021-06-12 20:02:37,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,794 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 20:02:37,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,796 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 20 treesize of output 16 [2021-06-12 20:02:37,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:02:37,839 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:37,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,842 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 7 [2021-06-12 20:02:37,843 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:37,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,883 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 13 treesize of output 9 [2021-06-12 20:02:37,884 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,887 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 12 treesize of output 8 [2021-06-12 20:02:37,888 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:37,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:37,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:37,925 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-06-12 20:02:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:38,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360249081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:38,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:38,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598635014] [2021-06-12 20:02:38,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:38,019 INFO L87 Difference]: Start difference. First operand 1163 states and 3742 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:38,293 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-12 20:02:38,499 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-06-12 20:02:38,788 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-12 20:02:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:39,040 INFO L93 Difference]: Finished difference Result 1604 states and 5042 transitions. [2021-06-12 20:02:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:39,042 INFO L225 Difference]: With dead ends: 1604 [2021-06-12 20:02:39,042 INFO L226 Difference]: Without dead ends: 1530 [2021-06-12 20:02:39,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1073.6ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-06-12 20:02:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1167. [2021-06-12 20:02:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.221269296740995) internal successors, (3756), 1166 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3756 transitions. [2021-06-12 20:02:39,055 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3756 transitions. Word has length 24 [2021-06-12 20:02:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:39,055 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 3756 transitions. [2021-06-12 20:02:39,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3756 transitions. [2021-06-12 20:02:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:39,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:39,056 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:39,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2655 [2021-06-12 20:02:39,256 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2124296548, now seen corresponding path program 331 times [2021-06-12 20:02:39,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454838686] [2021-06-12 20:02:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:39,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454838686] [2021-06-12 20:02:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454838686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598541642] [2021-06-12 20:02:39,452 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 20:02:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:39,544 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 19 treesize of output 15 [2021-06-12 20:02:39,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,547 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 19 treesize of output 15 [2021-06-12 20:02:39,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,551 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 19 treesize of output 15 [2021-06-12 20:02:39,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,554 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 19 treesize of output 15 [2021-06-12 20:02:39,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:39,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:02:39,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,782 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 20:02:39,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,785 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 20 treesize of output 16 [2021-06-12 20:02:39,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,857 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.4 percent of original size [2021-06-12 20:02:39,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,860 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 12 treesize of output 8 [2021-06-12 20:02:39,861 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:39,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,864 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 13 treesize of output 9 [2021-06-12 20:02:39,865 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:39,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:02:39,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:39,926 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1205 vanished before elimination [2021-06-12 20:02:39,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:39,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-12 20:02:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598541642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736269743] [2021-06-12 20:02:40,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:40,012 INFO L87 Difference]: Start difference. First operand 1167 states and 3756 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:40,400 INFO L93 Difference]: Finished difference Result 1389 states and 4424 transitions. [2021-06-12 20:02:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:40,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:40,402 INFO L225 Difference]: With dead ends: 1389 [2021-06-12 20:02:40,402 INFO L226 Difference]: Without dead ends: 1336 [2021-06-12 20:02:40,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-12 20:02:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1173. [2021-06-12 20:02:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.22098976109215) internal successors, (3775), 1172 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3775 transitions. [2021-06-12 20:02:40,413 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3775 transitions. Word has length 24 [2021-06-12 20:02:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:40,413 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3775 transitions. [2021-06-12 20:02:40,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3775 transitions. [2021-06-12 20:02:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:40,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:40,415 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:40,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-06-12 20:02:40,615 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash 202340282, now seen corresponding path program 332 times [2021-06-12 20:02:40,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:40,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076651326] [2021-06-12 20:02:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:40,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:40,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076651326] [2021-06-12 20:02:40,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076651326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326040462] [2021-06-12 20:02:40,833 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 20:02:40,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:40,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:40,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:40,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:40,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,927 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 19 treesize of output 15 [2021-06-12 20:02:40,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:40,962 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 20:02:40,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:02:41,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,024 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 20:02:41,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:41,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,082 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 20 treesize of output 16 [2021-06-12 20:02:41,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,086 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 19 treesize of output 15 [2021-06-12 20:02:41,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,136 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 11 treesize of output 7 [2021-06-12 20:02:41,137 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:02:41,140 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:41,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,189 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 12 treesize of output 8 [2021-06-12 20:02:41,190 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,193 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 13 treesize of output 9 [2021-06-12 20:02:41,194 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:41,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:41,239 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:02:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:41,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326040462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:41,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:41,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389211626] [2021-06-12 20:02:41,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:41,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:41,381 INFO L87 Difference]: Start difference. First operand 1173 states and 3775 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:41,765 INFO L93 Difference]: Finished difference Result 1418 states and 4489 transitions. [2021-06-12 20:02:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:41,767 INFO L225 Difference]: With dead ends: 1418 [2021-06-12 20:02:41,767 INFO L226 Difference]: Without dead ends: 1352 [2021-06-12 20:02:41,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-12 20:02:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1171. [2021-06-12 20:02:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.2222222222222223) internal successors, (3770), 1170 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3770 transitions. [2021-06-12 20:02:41,779 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3770 transitions. Word has length 24 [2021-06-12 20:02:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:41,779 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3770 transitions. [2021-06-12 20:02:41,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3770 transitions. [2021-06-12 20:02:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:41,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:41,780 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:41,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2685 [2021-06-12 20:02:41,980 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1823508822, now seen corresponding path program 333 times [2021-06-12 20:02:41,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:41,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862900082] [2021-06-12 20:02:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:42,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:42,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862900082] [2021-06-12 20:02:42,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862900082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700695189] [2021-06-12 20:02:42,187 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 20:02:42,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:42,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,323 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 18 treesize of output 14 [2021-06-12 20:02:42,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,326 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 20:02:42,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,381 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 17 treesize of output 13 [2021-06-12 20:02:42,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,385 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 18 treesize of output 14 [2021-06-12 20:02:42,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:42,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-12 20:02:42,544 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-12 20:02:42,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:42,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:42,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,556 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 20 treesize of output 16 [2021-06-12 20:02:42,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:42,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,614 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 11 treesize of output 7 [2021-06-12 20:02:42,615 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:42,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,618 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 11 treesize of output 7 [2021-06-12 20:02:42,619 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:42,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,623 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 12 treesize of output 8 [2021-06-12 20:02:42,624 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:42,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,627 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 12 treesize of output 8 [2021-06-12 20:02:42,628 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:42,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:42,675 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:189, output treesize:69 [2021-06-12 20:02:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:42,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700695189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:42,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819609836] [2021-06-12 20:02:42,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:42,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:42,817 INFO L87 Difference]: Start difference. First operand 1171 states and 3770 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:43,449 INFO L93 Difference]: Finished difference Result 1581 states and 4942 transitions. [2021-06-12 20:02:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:43,451 INFO L225 Difference]: With dead ends: 1581 [2021-06-12 20:02:43,451 INFO L226 Difference]: Without dead ends: 1488 [2021-06-12 20:02:43,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-12 20:02:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1182. [2021-06-12 20:02:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.2320067739204066) internal successors, (3817), 1181 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3817 transitions. [2021-06-12 20:02:43,464 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3817 transitions. Word has length 24 [2021-06-12 20:02:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:43,464 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3817 transitions. [2021-06-12 20:02:43,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3817 transitions. [2021-06-12 20:02:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:43,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:43,465 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:43,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2696 [2021-06-12 20:02:43,666 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1049304452, now seen corresponding path program 334 times [2021-06-12 20:02:43,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:43,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162987739] [2021-06-12 20:02:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:43,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:43,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162987739] [2021-06-12 20:02:43,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162987739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:43,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856807913] [2021-06-12 20:02:43,941 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 20:02:43,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:43,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,074 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 18 treesize of output 14 [2021-06-12 20:02:44,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,078 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 17 treesize of output 13 [2021-06-12 20:02:44,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,134 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 20:02:44,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,137 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 18 treesize of output 14 [2021-06-12 20:02:44,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:44,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-12 20:02:44,319 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-12 20:02:44,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,322 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 20:02:44,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,326 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 20:02:44,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,330 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 19 treesize of output 15 [2021-06-12 20:02:44,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,333 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 20:02:44,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,400 INFO L628 ElimStorePlain]: treesize reduction 93, result has 46.2 percent of original size [2021-06-12 20:02:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,403 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 7 [2021-06-12 20:02:44,404 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:44,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,407 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 11 treesize of output 7 [2021-06-12 20:02:44,408 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:44,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,432 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 20:02:44,433 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-12 20:02:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:44,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856807913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:44,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:44,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563315759] [2021-06-12 20:02:44,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:44,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:44,507 INFO L87 Difference]: Start difference. First operand 1182 states and 3817 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:44,938 INFO L93 Difference]: Finished difference Result 1427 states and 4547 transitions. [2021-06-12 20:02:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:44,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:44,940 INFO L225 Difference]: With dead ends: 1427 [2021-06-12 20:02:44,940 INFO L226 Difference]: Without dead ends: 1355 [2021-06-12 20:02:44,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-12 20:02:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1169. [2021-06-12 20:02:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.223458904109589) internal successors, (3765), 1168 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3765 transitions. [2021-06-12 20:02:44,952 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3765 transitions. Word has length 24 [2021-06-12 20:02:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:44,952 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3765 transitions. [2021-06-12 20:02:44,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3765 transitions. [2021-06-12 20:02:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:44,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:44,953 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:45,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2708,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:45,154 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:45,154 INFO L82 PathProgramCache]: Analyzing trace with hash 268376052, now seen corresponding path program 335 times [2021-06-12 20:02:45,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:45,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8128256] [2021-06-12 20:02:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:45,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:45,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8128256] [2021-06-12 20:02:45,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8128256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940705495] [2021-06-12 20:02:45,313 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 20:02:45,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:45,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:45,409 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 36 treesize of output 28 [2021-06-12 20:02:45,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:45,412 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 36 treesize of output 28 [2021-06-12 20:02:45,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:45,416 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 35 treesize of output 27 [2021-06-12 20:02:45,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,419 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 35 treesize of output 27 [2021-06-12 20:02:45,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,491 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-06-12 20:02:45,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:45,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-06-12 20:02:45,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-12 20:02:45,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,590 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 37 treesize of output 29 [2021-06-12 20:02:45,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,630 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-06-12 20:02:45,631 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 28 treesize of output 22 [2021-06-12 20:02:45,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,647 INFO L628 ElimStorePlain]: treesize reduction 15, result has 50.0 percent of original size [2021-06-12 20:02:45,647 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:02:45,647 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1217 vanished before elimination [2021-06-12 20:02:45,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,647 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:181, output treesize:15 [2021-06-12 20:02:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:45,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940705495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:45,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:02:45,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853898265] [2021-06-12 20:02:45,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:45,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:45,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:45,680 INFO L87 Difference]: Start difference. First operand 1169 states and 3765 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 20:02:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:45,993 INFO L93 Difference]: Finished difference Result 1355 states and 4255 transitions. [2021-06-12 20:02:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:45,993 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 24 [2021-06-12 20:02:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:45,994 INFO L225 Difference]: With dead ends: 1355 [2021-06-12 20:02:45,994 INFO L226 Difference]: Without dead ends: 1296 [2021-06-12 20:02:45,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-12 20:02:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1170. [2021-06-12 20:02:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.2241231822070144) internal successors, (3769), 1169 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3769 transitions. [2021-06-12 20:02:46,006 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3769 transitions. Word has length 24 [2021-06-12 20:02:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:46,006 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 3769 transitions. [2021-06-12 20:02:46,006 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 20:02:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3769 transitions. [2021-06-12 20:02:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:46,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:46,008 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:46,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,208 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:46,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1469595764, now seen corresponding path program 336 times [2021-06-12 20:02:46,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:46,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751077235] [2021-06-12 20:02:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:46,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:46,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751077235] [2021-06-12 20:02:46,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751077235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573048486] [2021-06-12 20:02:46,366 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 20:02:46,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:46,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:46,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:46,456 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 18 treesize of output 14 [2021-06-12 20:02:46,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,458 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 17 treesize of output 13 [2021-06-12 20:02:46,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:46,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:02:46,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,509 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 19 treesize of output 15 [2021-06-12 20:02:46,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,512 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 20 treesize of output 16 [2021-06-12 20:02:46,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,516 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 20 treesize of output 16 [2021-06-12 20:02:46,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,518 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 19 treesize of output 15 [2021-06-12 20:02:46,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,557 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 11 treesize of output 7 [2021-06-12 20:02:46,558 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,561 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 12 treesize of output 8 [2021-06-12 20:02:46,562 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:46,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,565 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 12 treesize of output 8 [2021-06-12 20:02:46,566 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:46,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,569 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 7 [2021-06-12 20:02:46,570 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:46,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,605 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 20:02:46,605 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:157, output treesize:57 [2021-06-12 20:02:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:46,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573048486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:46,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:46,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576331999] [2021-06-12 20:02:46,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:46,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:46,688 INFO L87 Difference]: Start difference. First operand 1170 states and 3769 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:47,431 INFO L93 Difference]: Finished difference Result 1541 states and 4744 transitions. [2021-06-12 20:02:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:47,433 INFO L225 Difference]: With dead ends: 1541 [2021-06-12 20:02:47,433 INFO L226 Difference]: Without dead ends: 1410 [2021-06-12 20:02:47,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-12 20:02:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1180. [2021-06-12 20:02:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-12 20:02:47,446 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-12 20:02:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-12 20:02:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-12 20:02:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:47,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:47,447 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:47,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2724 [2021-06-12 20:02:47,647 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2007088620, now seen corresponding path program 337 times [2021-06-12 20:02:47,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:47,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231562949] [2021-06-12 20:02:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:47,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231562949] [2021-06-12 20:02:47,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231562949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924697137] [2021-06-12 20:02:47,817 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 20:02:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:47,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,926 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 27 treesize of output 21 [2021-06-12 20:02:47,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,929 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 27 treesize of output 21 [2021-06-12 20:02:47,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:47,956 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 20:02:47,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:97, output treesize:87 [2021-06-12 20:02:48,016 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1221], 1=[o_0, v_prenex_1220]} [2021-06-12 20:02:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 20:02:48,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,027 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 30 treesize of output 24 [2021-06-12 20:02:48,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,101 INFO L628 ElimStorePlain]: treesize reduction 67, result has 62.1 percent of original size [2021-06-12 20:02:48,103 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 22 treesize of output 18 [2021-06-12 20:02:48,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,136 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 12 treesize of output 8 [2021-06-12 20:02:48,144 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:48,148 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:48,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,178 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 10 treesize of output 6 [2021-06-12 20:02:48,179 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:48,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:48,208 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:197, output treesize:47 [2021-06-12 20:02:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:48,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924697137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:48,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:48,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617385772] [2021-06-12 20:02:48,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:48,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:48,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:48,280 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:48,529 INFO L93 Difference]: Finished difference Result 1367 states and 4288 transitions. [2021-06-12 20:02:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:48,531 INFO L225 Difference]: With dead ends: 1367 [2021-06-12 20:02:48,531 INFO L226 Difference]: Without dead ends: 1314 [2021-06-12 20:02:48,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-12 20:02:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1180. [2021-06-12 20:02:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-12 20:02:48,543 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-12 20:02:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:48,543 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-12 20:02:48,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-12 20:02:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:48,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:48,544 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:48,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2730 [2021-06-12 20:02:48,745 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 787383338, now seen corresponding path program 338 times [2021-06-12 20:02:48,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:48,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7042464] [2021-06-12 20:02:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:48,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:48,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7042464] [2021-06-12 20:02:48,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7042464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552160721] [2021-06-12 20:02:48,906 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 20:02:48,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:48,979 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 28 treesize of output 22 [2021-06-12 20:02:48,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,981 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 37 treesize of output 29 [2021-06-12 20:02:48,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:48,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:66 [2021-06-12 20:02:49,028 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 41 treesize of output 33 [2021-06-12 20:02:49,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,031 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 42 treesize of output 34 [2021-06-12 20:02:49,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:49,034 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 40 treesize of output 32 [2021-06-12 20:02:49,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,036 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 41 treesize of output 33 [2021-06-12 20:02:49,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:49,100 INFO L628 ElimStorePlain]: treesize reduction 8, result has 90.6 percent of original size [2021-06-12 20:02:49,100 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:49,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:49,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:77 [2021-06-12 20:02:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:49,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552160721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:49,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 20:02:49,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731909764] [2021-06-12 20:02:49,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:02:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:02:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:02:49,172 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 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 20:02:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:49,393 INFO L93 Difference]: Finished difference Result 1460 states and 4526 transitions. [2021-06-12 20:02:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:49,394 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 24 [2021-06-12 20:02:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:49,395 INFO L225 Difference]: With dead ends: 1460 [2021-06-12 20:02:49,395 INFO L226 Difference]: Without dead ends: 1417 [2021-06-12 20:02:49,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-12 20:02:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1180. [2021-06-12 20:02:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-12 20:02:49,408 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-12 20:02:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:49,408 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-12 20:02:49,408 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 20:02:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-12 20:02:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:49,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:49,409 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:49,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2736,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:49,610 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1025053358, now seen corresponding path program 339 times [2021-06-12 20:02:49,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:49,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857468] [2021-06-12 20:02:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:49,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857468] [2021-06-12 20:02:49,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899277967] [2021-06-12 20:02:49,762 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 20:02:49,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:49,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:49,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,921 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 18 treesize of output 14 [2021-06-12 20:02:49,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,924 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 20:02:49,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:49,947 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 20:02:49,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-12 20:02:50,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:50,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,040 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 20:02:50,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,070 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-12 20:02:50,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,072 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 11 treesize of output 7 [2021-06-12 20:02:50,073 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:50,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:50,082 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 20:02:50,082 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-12 20:02:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:50,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899277967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:50,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:50,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592176576] [2021-06-12 20:02:50,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:50,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:50,117 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:50,405 INFO L93 Difference]: Finished difference Result 1367 states and 4276 transitions. [2021-06-12 20:02:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:50,411 INFO L225 Difference]: With dead ends: 1367 [2021-06-12 20:02:50,411 INFO L226 Difference]: Without dead ends: 1312 [2021-06-12 20:02:50,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-12 20:02:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1180. [2021-06-12 20:02:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-12 20:02:50,423 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-12 20:02:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:50,423 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-12 20:02:50,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-12 20:02:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:50,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:50,424 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:50,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-06-12 20:02:50,625 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 994449266, now seen corresponding path program 340 times [2021-06-12 20:02:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600081043] [2021-06-12 20:02:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:50,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600081043] [2021-06-12 20:02:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600081043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454904974] [2021-06-12 20:02:50,790 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 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 20:02:50,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:50,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:50,902 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 27 treesize of output 21 [2021-06-12 20:02:50,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,904 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 27 treesize of output 21 [2021-06-12 20:02:50,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:50,932 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 20:02:50,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:83 [2021-06-12 20:02:50,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,995 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 29 treesize of output 23 [2021-06-12 20:02:50,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:50,999 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 30 treesize of output 24 [2021-06-12 20:02:51,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,072 INFO L628 ElimStorePlain]: treesize reduction 65, result has 61.5 percent of original size [2021-06-12 20:02:51,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:51,077 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:51,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,079 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 12 treesize of output 8 [2021-06-12 20:02:51,080 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:51,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,113 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 22 treesize of output 18 [2021-06-12 20:02:51,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,144 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 10 treesize of output 6 [2021-06-12 20:02:51,145 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:51,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:51,174 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-06-12 20:02:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:51,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454904974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:51,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:51,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124323079] [2021-06-12 20:02:51,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:51,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:51,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:51,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:51,256 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 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 20:02:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:51,447 INFO L93 Difference]: Finished difference Result 1367 states and 4288 transitions. [2021-06-12 20:02:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:51,447 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 24 [2021-06-12 20:02:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:51,449 INFO L225 Difference]: With dead ends: 1367 [2021-06-12 20:02:51,449 INFO L226 Difference]: Without dead ends: 1314 [2021-06-12 20:02:51,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-12 20:02:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1178. [2021-06-12 20:02:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.221750212404418) internal successors, (3792), 1177 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3792 transitions. [2021-06-12 20:02:51,460 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3792 transitions. Word has length 24 [2021-06-12 20:02:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:51,460 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 3792 transitions. [2021-06-12 20:02:51,460 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 20:02:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3792 transitions. [2021-06-12 20:02:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:51,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:51,462 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:51,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2747 [2021-06-12 20:02:51,662 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:51,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:51,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1913755660, now seen corresponding path program 341 times [2021-06-12 20:02:51,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:51,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694969994] [2021-06-12 20:02:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:51,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:51,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694969994] [2021-06-12 20:02:51,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694969994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578387654] [2021-06-12 20:02:51,819 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 20:02:51,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:51,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:51,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,953 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 20:02:51,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:51,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,018 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 20:02:52,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,022 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 17 treesize of output 13 [2021-06-12 20:02:52,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:52,079 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:52,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,269 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 19 treesize of output 15 [2021-06-12 20:02:52,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,272 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 19 treesize of output 15 [2021-06-12 20:02:52,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,301 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-12 20:02:52,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:52,304 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:52,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,313 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 20:02:52,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-12 20:02:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578387654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922186559] [2021-06-12 20:02:52,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:52,350 INFO L87 Difference]: Start difference. First operand 1178 states and 3792 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:52,880 INFO L93 Difference]: Finished difference Result 1400 states and 4369 transitions. [2021-06-12 20:02:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:52,882 INFO L225 Difference]: With dead ends: 1400 [2021-06-12 20:02:52,882 INFO L226 Difference]: Without dead ends: 1321 [2021-06-12 20:02:52,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-06-12 20:02:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1180. [2021-06-12 20:02:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.2264631043257) internal successors, (3804), 1179 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3804 transitions. [2021-06-12 20:02:52,895 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3804 transitions. Word has length 24 [2021-06-12 20:02:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:52,895 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3804 transitions. [2021-06-12 20:02:52,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3804 transitions. [2021-06-12 20:02:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:52,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:52,896 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:53,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:53,096 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:53,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash -476468174, now seen corresponding path program 342 times [2021-06-12 20:02:53,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:53,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011320521] [2021-06-12 20:02:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:53,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:53,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011320521] [2021-06-12 20:02:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011320521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213001109] [2021-06-12 20:02:53,238 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 20:02:53,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:53,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:53,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:53,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:53,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,313 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 17 treesize of output 13 [2021-06-12 20:02:53,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,315 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 18 treesize of output 14 [2021-06-12 20:02:53,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:53,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 20:02:53,399 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-12 20:02:53,401 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 19 treesize of output 15 [2021-06-12 20:02:53,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,403 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 19 treesize of output 15 [2021-06-12 20:02:53,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,423 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 12 treesize of output 8 [2021-06-12 20:02:53,424 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:53,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,426 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 8 [2021-06-12 20:02:53,427 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:53,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,444 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 20:02:53,444 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-12 20:02:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213001109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:53,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773142168] [2021-06-12 20:02:53,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:53,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:53,493 INFO L87 Difference]: Start difference. First operand 1180 states and 3804 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 20:02:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:53,906 INFO L93 Difference]: Finished difference Result 1386 states and 4368 transitions. [2021-06-12 20:02:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:53,907 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 24 [2021-06-12 20:02:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:53,908 INFO L225 Difference]: With dead ends: 1386 [2021-06-12 20:02:53,908 INFO L226 Difference]: Without dead ends: 1327 [2021-06-12 20:02:53,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-12 20:02:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1183. [2021-06-12 20:02:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.22165820642978) internal successors, (3808), 1182 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3808 transitions. [2021-06-12 20:02:53,919 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3808 transitions. Word has length 24 [2021-06-12 20:02:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:53,920 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3808 transitions. [2021-06-12 20:02:53,920 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 20:02:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3808 transitions. [2021-06-12 20:02:53,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:53,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:53,921 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:54,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2764 [2021-06-12 20:02:54,121 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:54,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1171100684, now seen corresponding path program 343 times [2021-06-12 20:02:54,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:54,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207398812] [2021-06-12 20:02:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:54,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207398812] [2021-06-12 20:02:54,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207398812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110685460] [2021-06-12 20:02:54,292 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 20:02:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,423 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 17 treesize of output 13 [2021-06-12 20:02:54,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,426 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 18 treesize of output 14 [2021-06-12 20:02:54,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,489 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 20:02:54,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,492 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 18 treesize of output 14 [2021-06-12 20:02:54,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:54,550 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:54,722 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,726 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 20:02:54,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,729 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 20:02:54,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,758 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 11 treesize of output 7 [2021-06-12 20:02:54,759 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:02:54,763 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:54,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,787 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 20:02:54,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:34 [2021-06-12 20:02:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:54,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110685460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:54,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:02:54,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174437702] [2021-06-12 20:02:54,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:54,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:54,853 INFO L87 Difference]: Start difference. First operand 1183 states and 3808 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:55,243 INFO L93 Difference]: Finished difference Result 1372 states and 4348 transitions. [2021-06-12 20:02:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:02:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:55,245 INFO L225 Difference]: With dead ends: 1372 [2021-06-12 20:02:55,245 INFO L226 Difference]: Without dead ends: 1341 [2021-06-12 20:02:55,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-12 20:02:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1176. [2021-06-12 20:02:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.2229787234042555) internal successors, (3787), 1175 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3787 transitions. [2021-06-12 20:02:55,257 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3787 transitions. Word has length 24 [2021-06-12 20:02:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:55,257 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3787 transitions. [2021-06-12 20:02:55,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:02:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3787 transitions. [2021-06-12 20:02:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:55,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:55,258 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:55,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:55,459 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1344992854, now seen corresponding path program 344 times [2021-06-12 20:02:55,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:55,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873005282] [2021-06-12 20:02:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873005282] [2021-06-12 20:02:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873005282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851236824] [2021-06-12 20:02:55,600 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 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 20:02:55,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:55,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:55,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:55,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:55,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:55,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,806 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 20:02:55,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:55,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:55,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:55,869 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:02:55,967 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-06-12 20:02:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,971 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 20 treesize of output 16 [2021-06-12 20:02:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,975 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 20:02:55,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,979 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 19 treesize of output 15 [2021-06-12 20:02:55,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,983 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 20 treesize of output 16 [2021-06-12 20:02:55,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,041 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 12 treesize of output 8 [2021-06-12 20:02:56,042 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:56,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,046 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 12 treesize of output 8 [2021-06-12 20:02:56,047 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:56,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,051 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 7 [2021-06-12 20:02:56,052 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:56,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,055 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 11 treesize of output 7 [2021-06-12 20:02:56,056 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:56,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:56,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:56,108 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:201, output treesize:75 [2021-06-12 20:02:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:56,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851236824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:56,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:56,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:02:56,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433475566] [2021-06-12 20:02:56,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:56,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:56,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:56,203 INFO L87 Difference]: Start difference. First operand 1176 states and 3787 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 20:02:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:56,700 INFO L93 Difference]: Finished difference Result 1478 states and 4626 transitions. [2021-06-12 20:02:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:56,700 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 24 [2021-06-12 20:02:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:56,702 INFO L225 Difference]: With dead ends: 1478 [2021-06-12 20:02:56,702 INFO L226 Difference]: Without dead ends: 1431 [2021-06-12 20:02:56,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-12 20:02:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1181. [2021-06-12 20:02:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 3.23135593220339) internal successors, (3813), 1180 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3813 transitions. [2021-06-12 20:02:56,714 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3813 transitions. Word has length 24 [2021-06-12 20:02:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:56,714 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 3813 transitions. [2021-06-12 20:02:56,714 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 20:02:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3813 transitions. [2021-06-12 20:02:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:56,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:56,715 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:56,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2780 [2021-06-12 20:02:56,916 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2069700906, now seen corresponding path program 345 times [2021-06-12 20:02:56,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:56,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701947365] [2021-06-12 20:02:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:02:57,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701947365] [2021-06-12 20:02:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701947365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907330000] [2021-06-12 20:02:57,066 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 20:02:57,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:57,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,154 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 18 treesize of output 14 [2021-06-12 20:02:57,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,157 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 20:02:57,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,181 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 20:02:57,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-12 20:02:57,244 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:02:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,247 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 19 treesize of output 15 [2021-06-12 20:02:57,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:02:57,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,255 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 20:02:57,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,259 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 20 treesize of output 16 [2021-06-12 20:02:57,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,325 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 7 [2021-06-12 20:02:57,326 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:57,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,329 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 12 treesize of output 8 [2021-06-12 20:02:57,330 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:57,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,334 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 11 treesize of output 7 [2021-06-12 20:02:57,335 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:57,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,338 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 12 treesize of output 8 [2021-06-12 20:02:57,339 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:57,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,397 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 20:02:57,397 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:81 [2021-06-12 20:02:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:02:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907330000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:57,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:57,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120687110] [2021-06-12 20:02:57,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:57,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:57,517 INFO L87 Difference]: Start difference. First operand 1181 states and 3813 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 20:02:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:58,156 INFO L93 Difference]: Finished difference Result 1483 states and 4634 transitions. [2021-06-12 20:02:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:58,157 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 24 [2021-06-12 20:02:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:58,158 INFO L225 Difference]: With dead ends: 1483 [2021-06-12 20:02:58,158 INFO L226 Difference]: Without dead ends: 1442 [2021-06-12 20:02:58,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 628.8ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-12 20:02:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1176. [2021-06-12 20:02:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.2229787234042555) internal successors, (3787), 1175 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3787 transitions. [2021-06-12 20:02:58,171 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3787 transitions. Word has length 24 [2021-06-12 20:02:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:58,171 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3787 transitions. [2021-06-12 20:02:58,171 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 20:02:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3787 transitions. [2021-06-12 20:02:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:58,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:58,172 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:58,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:58,373 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash -511221484, now seen corresponding path program 346 times [2021-06-12 20:02:58,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:58,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168855069] [2021-06-12 20:02:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:58,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168855069] [2021-06-12 20:02:58,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168855069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737280748] [2021-06-12 20:02:58,531 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 20:02:58,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:58,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:58,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:02:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:58,620 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 19 treesize of output 15 [2021-06-12 20:02:58,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,623 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 19 treesize of output 15 [2021-06-12 20:02:58,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,626 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 20:02:58,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,629 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 20:02:58,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:58,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:02:58,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:02:58,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,861 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 20 treesize of output 16 [2021-06-12 20:02:58,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,864 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 20:02:58,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,938 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-06-12 20:02:58,938 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:02:58,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,941 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 20 treesize of output 16 [2021-06-12 20:02:58,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,944 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 20:02:58,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,977 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 12 treesize of output 8 [2021-06-12 20:02:58,978 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:58,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,980 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 13 treesize of output 9 [2021-06-12 20:02:58,981 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:59,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:59,011 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-12 20:02:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:59,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737280748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:59,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:02:59,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539549363] [2021-06-12 20:02:59,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:59,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:59,081 INFO L87 Difference]: Start difference. First operand 1176 states and 3787 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 20:02:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:59,366 INFO L93 Difference]: Finished difference Result 1367 states and 4294 transitions. [2021-06-12 20:02:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:59,366 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 24 [2021-06-12 20:02:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:59,368 INFO L225 Difference]: With dead ends: 1367 [2021-06-12 20:02:59,368 INFO L226 Difference]: Without dead ends: 1314 [2021-06-12 20:02:59,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-12 20:02:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1179. [2021-06-12 20:02:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 3.2232597623089982) internal successors, (3797), 1178 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3797 transitions. [2021-06-12 20:02:59,380 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3797 transitions. Word has length 24 [2021-06-12 20:02:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:59,380 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 3797 transitions. [2021-06-12 20:02:59,380 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 20:02:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3797 transitions. [2021-06-12 20:02:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:02:59,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:59,381 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:59,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2799 [2021-06-12 20:02:59,581 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1815415346, now seen corresponding path program 347 times [2021-06-12 20:02:59,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:59,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683679212] [2021-06-12 20:02:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:02:59,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683679212] [2021-06-12 20:02:59,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683679212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330356318] [2021-06-12 20:02:59,737 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 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 20:02:59,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:02:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:59,834 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 19 treesize of output 15 [2021-06-12 20:02:59,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,836 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 20:02:59,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,863 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 20:02:59,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:02:59,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,924 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 20 treesize of output 16 [2021-06-12 20:02:59,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:02:59,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,984 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 12 treesize of output 8 [2021-06-12 20:02:59,985 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:02:59,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,987 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 13 treesize of output 9 [2021-06-12 20:02:59,989 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:00,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:00,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,042 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 19 treesize of output 15 [2021-06-12 20:03:00,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,046 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 20 treesize of output 16 [2021-06-12 20:03:00,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:00,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:00,096 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:00,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,099 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 11 treesize of output 7 [2021-06-12 20:03:00,100 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:00,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:00,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:00,145 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:03:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:00,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330356318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:00,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:00,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699683560] [2021-06-12 20:03:00,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:00,240 INFO L87 Difference]: Start difference. First operand 1179 states and 3797 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 20:03:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:00,570 INFO L93 Difference]: Finished difference Result 1435 states and 4504 transitions. [2021-06-12 20:03:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:00,571 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 24 [2021-06-12 20:03:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:00,572 INFO L225 Difference]: With dead ends: 1435 [2021-06-12 20:03:00,573 INFO L226 Difference]: Without dead ends: 1388 [2021-06-12 20:03:00,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-12 20:03:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1184. [2021-06-12 20:03:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 3.231614539306847) internal successors, (3823), 1183 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3823 transitions. [2021-06-12 20:03:00,585 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3823 transitions. Word has length 24 [2021-06-12 20:03:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:00,585 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3823 transitions. [2021-06-12 20:03:00,585 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 20:03:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3823 transitions. [2021-06-12 20:03:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:00,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:00,586 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:00,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2808,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:00,787 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:00,787 INFO L82 PathProgramCache]: Analyzing trace with hash 935141810, now seen corresponding path program 348 times [2021-06-12 20:03:00,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:00,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023156743] [2021-06-12 20:03:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:00,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:00,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023156743] [2021-06-12 20:03:00,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023156743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:00,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164940729] [2021-06-12 20:03:00,937 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 20:03:00,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:00,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:01,050 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 19 treesize of output 15 [2021-06-12 20:03:01,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,054 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 20:03:01,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,057 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 20:03:01,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,060 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 19 treesize of output 15 [2021-06-12 20:03:01,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:01,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:03:01,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,236 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 20:03:01,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,240 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 20 treesize of output 16 [2021-06-12 20:03:01,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,416 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-12 20:03:01,417 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.5 percent of original size [2021-06-12 20:03:01,417 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:03:01,420 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 11 treesize of output 9 [2021-06-12 20:03:01,421 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 20:03:01,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,492 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 20 treesize of output 16 [2021-06-12 20:03:01,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,496 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 19 treesize of output 15 [2021-06-12 20:03:01,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1252 vanished before elimination [2021-06-12 20:03:01,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,563 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 20:03:01,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,629 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 12 treesize of output 8 [2021-06-12 20:03:01,630 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:01,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,633 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 13 treesize of output 9 [2021-06-12 20:03:01,634 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:01,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,698 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 12 treesize of output 8 [2021-06-12 20:03:01,699 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:01,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:03:01,759 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-12 20:03:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:01,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164940729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:01,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:01,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:01,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819781384] [2021-06-12 20:03:01,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:01,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:01,885 INFO L87 Difference]: Start difference. First operand 1184 states and 3823 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 20:03:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:02,160 INFO L93 Difference]: Finished difference Result 1409 states and 4405 transitions. [2021-06-12 20:03:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:02,160 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 24 [2021-06-12 20:03:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:02,162 INFO L225 Difference]: With dead ends: 1409 [2021-06-12 20:03:02,162 INFO L226 Difference]: Without dead ends: 1353 [2021-06-12 20:03:02,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-12 20:03:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1178. [2021-06-12 20:03:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.225998300764656) internal successors, (3797), 1177 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3797 transitions. [2021-06-12 20:03:02,174 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3797 transitions. Word has length 24 [2021-06-12 20:03:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:02,174 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 3797 transitions. [2021-06-12 20:03:02,174 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 20:03:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3797 transitions. [2021-06-12 20:03:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:02,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:02,175 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:02,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2816,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:02,375 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1356230344, now seen corresponding path program 349 times [2021-06-12 20:03:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:02,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011703904] [2021-06-12 20:03:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:02,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:02,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011703904] [2021-06-12 20:03:02,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011703904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646721528] [2021-06-12 20:03:02,629 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 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 20:03:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,697 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 19 treesize of output 15 [2021-06-12 20:03:02,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,700 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 19 treesize of output 15 [2021-06-12 20:03:02,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,704 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 19 treesize of output 15 [2021-06-12 20:03:02,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,707 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 20:03:02,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:02,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:02,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-12 20:03:02,958 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1261], 1=[o_0, v_prenex_1260]} [2021-06-12 20:03:02,961 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 19 treesize of output 15 [2021-06-12 20:03:02,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:03:02,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,046 INFO L628 ElimStorePlain]: treesize reduction 55, result has 65.8 percent of original size [2021-06-12 20:03:03,049 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 11 treesize of output 9 [2021-06-12 20:03:03,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:03,084 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:03,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,086 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 13 treesize of output 9 [2021-06-12 20:03:03,087 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:03,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,116 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1260 vanished before elimination [2021-06-12 20:03:03,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:03,117 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:47 [2021-06-12 20:03:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:03,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646721528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:03,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:03,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333629312] [2021-06-12 20:03:03,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:03,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:03,194 INFO L87 Difference]: Start difference. First operand 1178 states and 3797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:03,621 INFO L93 Difference]: Finished difference Result 1624 states and 5016 transitions. [2021-06-12 20:03:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:03,623 INFO L225 Difference]: With dead ends: 1624 [2021-06-12 20:03:03,623 INFO L226 Difference]: Without dead ends: 1567 [2021-06-12 20:03:03,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-06-12 20:03:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1181. [2021-06-12 20:03:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 3.226271186440678) internal successors, (3807), 1180 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3807 transitions. [2021-06-12 20:03:03,637 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3807 transitions. Word has length 24 [2021-06-12 20:03:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:03,637 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 3807 transitions. [2021-06-12 20:03:03,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3807 transitions. [2021-06-12 20:03:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:03,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:03,638 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:03,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2828 [2021-06-12 20:03:03,838 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 621770154, now seen corresponding path program 350 times [2021-06-12 20:03:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:03,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077625319] [2021-06-12 20:03:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:04,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077625319] [2021-06-12 20:03:04,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077625319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788856444] [2021-06-12 20:03:04,011 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 20:03:04,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:04,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:04,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:04,076 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 20:03:04,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,078 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 19 treesize of output 15 [2021-06-12 20:03:04,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,102 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 20:03:04,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-06-12 20:03:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,222 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 19 treesize of output 15 [2021-06-12 20:03:04,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,225 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 20 treesize of output 16 [2021-06-12 20:03:04,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,246 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 13 treesize of output 9 [2021-06-12 20:03:04,247 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:04,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,249 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 7 [2021-06-12 20:03:04,250 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:04,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,267 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 20:03:04,267 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-12 20:03:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:04,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788856444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:04,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:04,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947416791] [2021-06-12 20:03:04,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:04,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:04,316 INFO L87 Difference]: Start difference. First operand 1181 states and 3807 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 20:03:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:04,618 INFO L93 Difference]: Finished difference Result 1546 states and 4846 transitions. [2021-06-12 20:03:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:04,618 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 24 [2021-06-12 20:03:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:04,620 INFO L225 Difference]: With dead ends: 1546 [2021-06-12 20:03:04,620 INFO L226 Difference]: Without dead ends: 1507 [2021-06-12 20:03:04,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-12 20:03:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1184. [2021-06-12 20:03:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 3.2265426880811496) internal successors, (3817), 1183 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3817 transitions. [2021-06-12 20:03:04,633 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3817 transitions. Word has length 24 [2021-06-12 20:03:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:04,633 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3817 transitions. [2021-06-12 20:03:04,633 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 20:03:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3817 transitions. [2021-06-12 20:03:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:04,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:04,634 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:04,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2836,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:04,834 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1346560312, now seen corresponding path program 351 times [2021-06-12 20:03:04,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:04,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047855378] [2021-06-12 20:03:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:05,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:05,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047855378] [2021-06-12 20:03:05,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047855378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992948760] [2021-06-12 20:03:05,002 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 20:03:05,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:03:05,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:05,067 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 20:03:05,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,070 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 19 treesize of output 15 [2021-06-12 20:03:05,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,073 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 20:03:05,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,076 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 20:03:05,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:05,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-12 20:03:05,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:05,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,322 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 20:03:05,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,492 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-06-12 20:03:05,492 INFO L628 ElimStorePlain]: treesize reduction 163, result has 55.3 percent of original size [2021-06-12 20:03:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,497 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 19 treesize of output 15 [2021-06-12 20:03:05,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,501 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 20 treesize of output 16 [2021-06-12 20:03:05,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,579 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 12 treesize of output 8 [2021-06-12 20:03:05,580 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:05,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:05,585 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:05,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,649 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:03:05,652 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 11 treesize of output 9 [2021-06-12 20:03:05,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,717 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 19 treesize of output 15 [2021-06-12 20:03:05,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,778 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1267 vanished before elimination [2021-06-12 20:03:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,782 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 12 treesize of output 8 [2021-06-12 20:03:05,783 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:05,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:05,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:03:05,844 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-12 20:03:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:05,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992948760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:05,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:05,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640976239] [2021-06-12 20:03:05,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:05,982 INFO L87 Difference]: Start difference. First operand 1184 states and 3817 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 20:03:06,326 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-06-12 20:03:06,483 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-12 20:03:06,768 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-12 20:03:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:07,095 INFO L93 Difference]: Finished difference Result 1732 states and 5301 transitions. [2021-06-12 20:03:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:07,095 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 24 [2021-06-12 20:03:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:07,097 INFO L225 Difference]: With dead ends: 1732 [2021-06-12 20:03:07,097 INFO L226 Difference]: Without dead ends: 1609 [2021-06-12 20:03:07,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1131.1ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-12 20:03:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1191. [2021-06-12 20:03:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.235294117647059) internal successors, (3850), 1190 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3850 transitions. [2021-06-12 20:03:07,111 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3850 transitions. Word has length 24 [2021-06-12 20:03:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:07,111 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3850 transitions. [2021-06-12 20:03:07,111 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 20:03:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3850 transitions. [2021-06-12 20:03:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:07,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:07,112 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:07,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2842,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:07,312 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2068133448, now seen corresponding path program 352 times [2021-06-12 20:03:07,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:07,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548205987] [2021-06-12 20:03:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:07,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548205987] [2021-06-12 20:03:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548205987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581041613] [2021-06-12 20:03:07,458 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 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 20:03:07,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:07,524 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 19 treesize of output 15 [2021-06-12 20:03:07,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,527 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 19 treesize of output 15 [2021-06-12 20:03:07,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:07,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,533 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 19 treesize of output 15 [2021-06-12 20:03:07,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:07,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:07,584 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-12 20:03:07,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,773 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 20:03:07,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,778 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 20 treesize of output 16 [2021-06-12 20:03:07,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,948 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-12 20:03:07,949 INFO L628 ElimStorePlain]: treesize reduction 158, result has 56.6 percent of original size [2021-06-12 20:03:07,952 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 11 treesize of output 9 [2021-06-12 20:03:07,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,021 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:03:08,024 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 11 treesize of output 9 [2021-06-12 20:03:08,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,101 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 20 treesize of output 16 [2021-06-12 20:03:08,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,105 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 20:03:08,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,168 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1276 vanished before elimination [2021-06-12 20:03:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,171 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 11 treesize of output 7 [2021-06-12 20:03:08,173 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:08,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,237 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 11 treesize of output 7 [2021-06-12 20:03:08,238 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:08,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,241 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 13 treesize of output 9 [2021-06-12 20:03:08,242 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:08,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:08,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:03:08,303 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-12 20:03:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:08,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581041613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:08,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:08,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048109951] [2021-06-12 20:03:08,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:08,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:08,431 INFO L87 Difference]: Start difference. First operand 1191 states and 3850 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 20:03:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:08,895 INFO L93 Difference]: Finished difference Result 1582 states and 4926 transitions. [2021-06-12 20:03:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:08,895 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 24 [2021-06-12 20:03:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:08,897 INFO L225 Difference]: With dead ends: 1582 [2021-06-12 20:03:08,897 INFO L226 Difference]: Without dead ends: 1534 [2021-06-12 20:03:08,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-12 20:03:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1181. [2021-06-12 20:03:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 3.230508474576271) internal successors, (3812), 1180 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3812 transitions. [2021-06-12 20:03:08,915 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3812 transitions. Word has length 24 [2021-06-12 20:03:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:08,915 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 3812 transitions. [2021-06-12 20:03:08,915 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 20:03:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3812 transitions. [2021-06-12 20:03:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:08,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:08,916 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2854 [2021-06-12 20:03:09,116 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1896509600, now seen corresponding path program 353 times [2021-06-12 20:03:09,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:09,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613242364] [2021-06-12 20:03:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:09,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:09,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613242364] [2021-06-12 20:03:09,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613242364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374449033] [2021-06-12 20:03:09,281 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 20:03:09,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:09,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:09,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,414 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 26 treesize of output 20 [2021-06-12 20:03:09,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,417 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 25 treesize of output 19 [2021-06-12 20:03:09,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:09,439 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 20:03:09,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:65 [2021-06-12 20:03:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,524 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 27 treesize of output 21 [2021-06-12 20:03:09,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,527 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 27 treesize of output 21 [2021-06-12 20:03:09,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,556 INFO L628 ElimStorePlain]: treesize reduction 51, result has 41.4 percent of original size [2021-06-12 20:03:09,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:09,559 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:09,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:09,568 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 20:03:09,568 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-06-12 20:03:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374449033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:09,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:09,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226035] [2021-06-12 20:03:09,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:09,599 INFO L87 Difference]: Start difference. First operand 1181 states and 3812 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 20:03:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:09,837 INFO L93 Difference]: Finished difference Result 1281 states and 4049 transitions. [2021-06-12 20:03:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:09,837 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 24 [2021-06-12 20:03:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:09,839 INFO L225 Difference]: With dead ends: 1281 [2021-06-12 20:03:09,839 INFO L226 Difference]: Without dead ends: 1222 [2021-06-12 20:03:09,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-12 20:03:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1183. [2021-06-12 20:03:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.230964467005076) internal successors, (3819), 1182 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3819 transitions. [2021-06-12 20:03:09,850 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3819 transitions. Word has length 24 [2021-06-12 20:03:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:09,850 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3819 transitions. [2021-06-12 20:03:09,850 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 20:03:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3819 transitions. [2021-06-12 20:03:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:09,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:09,851 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:10,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:10,052 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:10,052 INFO L82 PathProgramCache]: Analyzing trace with hash 158537784, now seen corresponding path program 354 times [2021-06-12 20:03:10,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:10,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138380752] [2021-06-12 20:03:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:10,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:10,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138380752] [2021-06-12 20:03:10,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138380752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791787860] [2021-06-12 20:03:10,219 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 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 20:03:10,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:10,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:10,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,337 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 18 treesize of output 14 [2021-06-12 20:03:10,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,339 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 17 treesize of output 13 [2021-06-12 20:03:10,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,360 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 20:03:10,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 20:03:10,412 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:10,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,415 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 20 treesize of output 16 [2021-06-12 20:03:10,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,419 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 19 treesize of output 15 [2021-06-12 20:03:10,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:10,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,426 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 20 treesize of output 16 [2021-06-12 20:03:10,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:10,485 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:10,489 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:10,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,492 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 12 treesize of output 8 [2021-06-12 20:03:10,493 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:10,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,496 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 11 treesize of output 7 [2021-06-12 20:03:10,497 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:10,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,549 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 20:03:10,549 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:57 [2021-06-12 20:03:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791787860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:10,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:10,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314741483] [2021-06-12 20:03:10,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:10,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:10,644 INFO L87 Difference]: Start difference. First operand 1183 states and 3819 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:10,990 INFO L93 Difference]: Finished difference Result 1345 states and 4256 transitions. [2021-06-12 20:03:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:10,992 INFO L225 Difference]: With dead ends: 1345 [2021-06-12 20:03:10,992 INFO L226 Difference]: Without dead ends: 1279 [2021-06-12 20:03:10,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-12 20:03:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1183. [2021-06-12 20:03:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.230964467005076) internal successors, (3819), 1182 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3819 transitions. [2021-06-12 20:03:11,004 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3819 transitions. Word has length 24 [2021-06-12 20:03:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:11,004 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3819 transitions. [2021-06-12 20:03:11,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3819 transitions. [2021-06-12 20:03:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:11,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:11,005 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:11,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2871 [2021-06-12 20:03:11,206 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash -378955072, now seen corresponding path program 355 times [2021-06-12 20:03:11,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:11,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616567616] [2021-06-12 20:03:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:11,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616567616] [2021-06-12 20:03:11,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616567616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733181878] [2021-06-12 20:03:11,382 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 20:03:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:11,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:11,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:11,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 20:03:11,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,492 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 1 xjuncts. [2021-06-12 20:03:11,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:36 [2021-06-12 20:03:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,528 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 29 treesize of output 23 [2021-06-12 20:03:11,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,531 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 30 treesize of output 24 [2021-06-12 20:03:11,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-12 20:03:11,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,555 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 12 treesize of output 8 [2021-06-12 20:03:11,556 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:11,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,585 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 20:03:11,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:27 [2021-06-12 20:03:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:11,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733181878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:11,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:11,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940036222] [2021-06-12 20:03:11,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:11,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:11,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:11,649 INFO L87 Difference]: Start difference. First operand 1183 states and 3819 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:11,883 INFO L93 Difference]: Finished difference Result 1277 states and 4053 transitions. [2021-06-12 20:03:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:11,885 INFO L225 Difference]: With dead ends: 1277 [2021-06-12 20:03:11,885 INFO L226 Difference]: Without dead ends: 1238 [2021-06-12 20:03:11,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-12 20:03:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1185. [2021-06-12 20:03:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.22972972972973) internal successors, (3824), 1184 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3824 transitions. [2021-06-12 20:03:11,896 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3824 transitions. Word has length 24 [2021-06-12 20:03:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:11,896 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3824 transitions. [2021-06-12 20:03:11,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3824 transitions. [2021-06-12 20:03:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:11,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:11,898 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:12,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2881 [2021-06-12 20:03:12,098 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:12,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1007807298, now seen corresponding path program 356 times [2021-06-12 20:03:12,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:12,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834085245] [2021-06-12 20:03:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:12,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834085245] [2021-06-12 20:03:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834085245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098035157] [2021-06-12 20:03:12,247 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 20:03:12,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,352 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 18 treesize of output 14 [2021-06-12 20:03:12,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,355 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 20:03:12,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,418 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 20:03:12,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,421 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 18 treesize of output 14 [2021-06-12 20:03:12,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:12,479 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:03:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,665 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 20:03:12,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,676 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 7 [2021-06-12 20:03:12,677 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:12,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:12,686 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 20:03:12,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-12 20:03:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098035157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:12,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:12,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121733038] [2021-06-12 20:03:12,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:12,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:12,721 INFO L87 Difference]: Start difference. First operand 1185 states and 3824 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:13,160 INFO L93 Difference]: Finished difference Result 1356 states and 4257 transitions. [2021-06-12 20:03:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:13,162 INFO L225 Difference]: With dead ends: 1356 [2021-06-12 20:03:13,162 INFO L226 Difference]: Without dead ends: 1298 [2021-06-12 20:03:13,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-06-12 20:03:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1200. [2021-06-12 20:03:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.229357798165138) internal successors, (3872), 1199 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 3872 transitions. [2021-06-12 20:03:13,174 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 3872 transitions. Word has length 24 [2021-06-12 20:03:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:13,174 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 3872 transitions. [2021-06-12 20:03:13,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 3872 transitions. [2021-06-12 20:03:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:13,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:13,175 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:13,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2886 [2021-06-12 20:03:13,376 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash -730164518, now seen corresponding path program 357 times [2021-06-12 20:03:13,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:13,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973819766] [2021-06-12 20:03:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:13,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:13,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973819766] [2021-06-12 20:03:13,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973819766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621517256] [2021-06-12 20:03:13,557 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 20:03:13,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:13,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:13,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,663 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 20:03:13,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,727 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 18 treesize of output 14 [2021-06-12 20:03:13,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,730 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 17 treesize of output 13 [2021-06-12 20:03:13,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:13,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:03:13,933 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:13,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,936 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 19 treesize of output 15 [2021-06-12 20:03:13,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,939 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 20 treesize of output 16 [2021-06-12 20:03:13,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,964 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 11 treesize of output 7 [2021-06-12 20:03:13,965 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:13,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,968 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 12 treesize of output 8 [2021-06-12 20:03:13,969 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:13,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,990 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 20:03:13,990 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-12 20:03:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:14,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621517256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:14,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:14,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40576530] [2021-06-12 20:03:14,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:14,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:14,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:14,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:14,062 INFO L87 Difference]: Start difference. First operand 1200 states and 3872 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:14,560 INFO L93 Difference]: Finished difference Result 1496 states and 4633 transitions. [2021-06-12 20:03:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:14,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:14,562 INFO L225 Difference]: With dead ends: 1496 [2021-06-12 20:03:14,562 INFO L226 Difference]: Without dead ends: 1434 [2021-06-12 20:03:14,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-06-12 20:03:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1198. [2021-06-12 20:03:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.230576441102757) internal successors, (3867), 1197 states have internal predecessors, (3867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3867 transitions. [2021-06-12 20:03:14,575 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3867 transitions. Word has length 24 [2021-06-12 20:03:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:14,575 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3867 transitions. [2021-06-12 20:03:14,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3867 transitions. [2021-06-12 20:03:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:14,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:14,576 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:14,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2893 [2021-06-12 20:03:14,777 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1223918304, now seen corresponding path program 358 times [2021-06-12 20:03:14,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:14,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138824604] [2021-06-12 20:03:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:14,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138824604] [2021-06-12 20:03:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138824604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648356126] [2021-06-12 20:03:14,926 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 20:03:14,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:14,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:15,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:15,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,038 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 18 treesize of output 14 [2021-06-12 20:03:15,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,102 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 20:03:15,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,106 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 18 treesize of output 14 [2021-06-12 20:03:15,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:15,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:03:15,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,308 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 19 treesize of output 15 [2021-06-12 20:03:15,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,319 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 11 treesize of output 7 [2021-06-12 20:03:15,321 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:15,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,329 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 20:03:15,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-12 20:03:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:15,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648356126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:15,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:15,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435687058] [2021-06-12 20:03:15,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:15,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:15,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:15,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:15,355 INFO L87 Difference]: Start difference. First operand 1198 states and 3867 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 20:03:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:15,534 INFO L93 Difference]: Finished difference Result 1329 states and 4193 transitions. [2021-06-12 20:03:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:15,534 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 24 [2021-06-12 20:03:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:15,535 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 20:03:15,535 INFO L226 Difference]: Without dead ends: 1298 [2021-06-12 20:03:15,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-06-12 20:03:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1193. [2021-06-12 20:03:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2348993288590604) internal successors, (3856), 1192 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3856 transitions. [2021-06-12 20:03:15,548 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3856 transitions. Word has length 24 [2021-06-12 20:03:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:15,548 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3856 transitions. [2021-06-12 20:03:15,548 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 20:03:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3856 transitions. [2021-06-12 20:03:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:15,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:15,549 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2903 [2021-06-12 20:03:15,749 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1750462274, now seen corresponding path program 359 times [2021-06-12 20:03:15,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:15,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514435386] [2021-06-12 20:03:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:15,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514435386] [2021-06-12 20:03:15,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514435386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251426862] [2021-06-12 20:03:15,935 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 20:03:15,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:03:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:16,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,038 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 18 treesize of output 14 [2021-06-12 20:03:16,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,042 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 17 treesize of output 13 [2021-06-12 20:03:16,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,104 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 18 treesize of output 14 [2021-06-12 20:03:16,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,107 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 20:03:16,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:16,165 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:03:16,329 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:16,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,332 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 19 treesize of output 15 [2021-06-12 20:03:16,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,336 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 20:03:16,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,365 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 11 treesize of output 7 [2021-06-12 20:03:16,366 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:16,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,368 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 11 treesize of output 7 [2021-06-12 20:03:16,369 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:16,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:16,394 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 20:03:16,394 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-06-12 20:03:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251426862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:16,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:16,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364365198] [2021-06-12 20:03:16,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:16,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:16,460 INFO L87 Difference]: Start difference. First operand 1193 states and 3856 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:16,808 INFO L93 Difference]: Finished difference Result 1427 states and 4463 transitions. [2021-06-12 20:03:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:16,810 INFO L225 Difference]: With dead ends: 1427 [2021-06-12 20:03:16,810 INFO L226 Difference]: Without dead ends: 1350 [2021-06-12 20:03:16,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-12 20:03:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1186. [2021-06-12 20:03:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 3.230379746835443) internal successors, (3828), 1185 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3828 transitions. [2021-06-12 20:03:16,822 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3828 transitions. Word has length 24 [2021-06-12 20:03:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:16,822 INFO L482 AbstractCegarLoop]: Abstraction has 1186 states and 3828 transitions. [2021-06-12 20:03:16,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3828 transitions. [2021-06-12 20:03:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:16,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:16,823 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:17,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2909,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:17,024 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:17,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1576570104, now seen corresponding path program 360 times [2021-06-12 20:03:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:17,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565039493] [2021-06-12 20:03:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:17,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:17,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565039493] [2021-06-12 20:03:17,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565039493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789497232] [2021-06-12 20:03:17,229 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 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 20:03:17,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:03:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,332 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 18 treesize of output 14 [2021-06-12 20:03:17,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,335 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 20:03:17,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,360 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 20:03:17,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-12 20:03:17,413 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:17,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:17,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,420 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 19 treesize of output 15 [2021-06-12 20:03:17,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,424 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 20 treesize of output 16 [2021-06-12 20:03:17,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,428 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 19 treesize of output 15 [2021-06-12 20:03:17,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,502 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 11 treesize of output 7 [2021-06-12 20:03:17,503 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,506 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 11 treesize of output 7 [2021-06-12 20:03:17,507 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,511 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 12 treesize of output 8 [2021-06-12 20:03:17,512 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,515 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 8 [2021-06-12 20:03:17,516 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:17,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,573 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 20:03:17,574 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:69 [2021-06-12 20:03:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789497232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:17,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737098905] [2021-06-12 20:03:17,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:17,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:17,715 INFO L87 Difference]: Start difference. First operand 1186 states and 3828 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:18,213 INFO L93 Difference]: Finished difference Result 1431 states and 4492 transitions. [2021-06-12 20:03:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:18,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:18,215 INFO L225 Difference]: With dead ends: 1431 [2021-06-12 20:03:18,215 INFO L226 Difference]: Without dead ends: 1365 [2021-06-12 20:03:18,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-12 20:03:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1185. [2021-06-12 20:03:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.22972972972973) internal successors, (3824), 1184 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3824 transitions. [2021-06-12 20:03:18,232 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3824 transitions. Word has length 24 [2021-06-12 20:03:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:18,232 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3824 transitions. [2021-06-12 20:03:18,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3824 transitions. [2021-06-12 20:03:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:18,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:18,234 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:18,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2917,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:18,434 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1884625822, now seen corresponding path program 361 times [2021-06-12 20:03:18,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:18,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950796126] [2021-06-12 20:03:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:18,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:18,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950796126] [2021-06-12 20:03:18,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950796126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:18,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297999068] [2021-06-12 20:03:18,622 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 20:03:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:18,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:18,703 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 19 treesize of output 15 [2021-06-12 20:03:18,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,707 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 19 treesize of output 15 [2021-06-12 20:03:18,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,710 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 19 treesize of output 15 [2021-06-12 20:03:18,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:18,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:18,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:18,770 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:03:18,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:18,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:18,941 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 30 treesize of output 24 [2021-06-12 20:03:18,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:18,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:18,945 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 29 treesize of output 23 [2021-06-12 20:03:18,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,025 INFO L628 ElimStorePlain]: treesize reduction 59, result has 62.4 percent of original size [2021-06-12 20:03:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:19,029 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,032 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 7 [2021-06-12 20:03:19,033 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:19,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,065 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 11 treesize of output 9 [2021-06-12 20:03:19,066 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,094 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1304 vanished before elimination [2021-06-12 20:03:19,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:19,096 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-06-12 20:03:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:19,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297999068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:19,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:19,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899570053] [2021-06-12 20:03:19,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:19,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:19,171 INFO L87 Difference]: Start difference. First operand 1185 states and 3824 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:19,517 INFO L93 Difference]: Finished difference Result 1338 states and 4247 transitions. [2021-06-12 20:03:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:19,519 INFO L225 Difference]: With dead ends: 1338 [2021-06-12 20:03:19,519 INFO L226 Difference]: Without dead ends: 1285 [2021-06-12 20:03:19,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-12 20:03:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1188. [2021-06-12 20:03:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.2299915754001685) internal successors, (3834), 1187 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3834 transitions. [2021-06-12 20:03:19,531 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3834 transitions. Word has length 24 [2021-06-12 20:03:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:19,531 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3834 transitions. [2021-06-12 20:03:19,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3834 transitions. [2021-06-12 20:03:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:19,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:19,532 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:19,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2926,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:19,733 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash 442011008, now seen corresponding path program 362 times [2021-06-12 20:03:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833991270] [2021-06-12 20:03:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:19,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:19,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833991270] [2021-06-12 20:03:19,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833991270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103197788] [2021-06-12 20:03:19,942 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 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 20:03:19,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:19,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:20,030 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 19 treesize of output 15 [2021-06-12 20:03:20,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,032 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 20:03:20,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,058 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 20:03:20,058 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:03:20,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:20,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,124 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 20:03:20,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,180 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 20 treesize of output 16 [2021-06-12 20:03:20,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,189 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 20:03:20,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,247 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 13 treesize of output 9 [2021-06-12 20:03:20,248 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:20,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:20,252 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:20,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,305 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 11 treesize of output 7 [2021-06-12 20:03:20,306 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,309 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 13 treesize of output 9 [2021-06-12 20:03:20,310 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:20,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:20,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:20,355 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:03:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:20,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103197788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:20,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:20,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003031384] [2021-06-12 20:03:20,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:20,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:20,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:20,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:20,469 INFO L87 Difference]: Start difference. First operand 1188 states and 3834 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:21,081 INFO L93 Difference]: Finished difference Result 1436 states and 4459 transitions. [2021-06-12 20:03:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:21,083 INFO L225 Difference]: With dead ends: 1436 [2021-06-12 20:03:21,083 INFO L226 Difference]: Without dead ends: 1374 [2021-06-12 20:03:21,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 683.9ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-06-12 20:03:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1191. [2021-06-12 20:03:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.230252100840336) internal successors, (3844), 1190 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3844 transitions. [2021-06-12 20:03:21,096 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3844 transitions. Word has length 24 [2021-06-12 20:03:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:21,096 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3844 transitions. [2021-06-12 20:03:21,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3844 transitions. [2021-06-12 20:03:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:21,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:21,097 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:21,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2935,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:21,297 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2043570622, now seen corresponding path program 363 times [2021-06-12 20:03:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:21,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640976487] [2021-06-12 20:03:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:21,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640976487] [2021-06-12 20:03:21,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640976487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743850493] [2021-06-12 20:03:21,442 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 20:03:21,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:21,515 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 20:03:21,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,517 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 20:03:21,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,544 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 20:03:21,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:03:21,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,606 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 19 treesize of output 15 [2021-06-12 20:03:21,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,609 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 20 treesize of output 16 [2021-06-12 20:03:21,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,677 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 20:03:21,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,681 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 20 treesize of output 16 [2021-06-12 20:03:21,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:21,733 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:21,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,736 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 13 treesize of output 9 [2021-06-12 20:03:21,737 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:21,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:21,787 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,790 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 12 treesize of output 8 [2021-06-12 20:03:21,791 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:21,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:21,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:21,836 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:03:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:21,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743850493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:21,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382397329] [2021-06-12 20:03:21,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:21,959 INFO L87 Difference]: Start difference. First operand 1191 states and 3844 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 20:03:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:22,463 INFO L93 Difference]: Finished difference Result 1342 states and 4239 transitions. [2021-06-12 20:03:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 24 [2021-06-12 20:03:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:22,469 INFO L225 Difference]: With dead ends: 1342 [2021-06-12 20:03:22,470 INFO L226 Difference]: Without dead ends: 1285 [2021-06-12 20:03:22,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-12 20:03:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1185. [2021-06-12 20:03:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.22972972972973) internal successors, (3824), 1184 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3824 transitions. [2021-06-12 20:03:22,482 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3824 transitions. Word has length 24 [2021-06-12 20:03:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:22,482 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3824 transitions. [2021-06-12 20:03:22,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 20:03:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3824 transitions. [2021-06-12 20:03:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:22,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:22,483 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:22,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2943 [2021-06-12 20:03:22,683 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1663972782, now seen corresponding path program 364 times [2021-06-12 20:03:22,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:22,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008492965] [2021-06-12 20:03:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:22,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008492965] [2021-06-12 20:03:22,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008492965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664870268] [2021-06-12 20:03:22,865 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 20:03:22,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:22,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,953 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 17 treesize of output 13 [2021-06-12 20:03:22,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:22,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,960 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 17 treesize of output 13 [2021-06-12 20:03:22,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,963 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 18 treesize of output 14 [2021-06-12 20:03:22,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:23,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:03:23,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,199 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 20:03:23,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:23,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,231 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-12 20:03:23,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,233 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 11 treesize of output 7 [2021-06-12 20:03:23,234 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:23,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,244 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 20:03:23,244 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-12 20:03:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:23,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664870268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:23,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:23,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752025442] [2021-06-12 20:03:23,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:23,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:23,285 INFO L87 Difference]: Start difference. First operand 1185 states and 3824 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:23,690 INFO L93 Difference]: Finished difference Result 1362 states and 4264 transitions. [2021-06-12 20:03:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:23,692 INFO L225 Difference]: With dead ends: 1362 [2021-06-12 20:03:23,692 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 20:03:23,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 20:03:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1203. [2021-06-12 20:03:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 3.23044925124792) internal successors, (3883), 1202 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3883 transitions. [2021-06-12 20:03:23,704 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3883 transitions. Word has length 24 [2021-06-12 20:03:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:23,704 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3883 transitions. [2021-06-12 20:03:23,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3883 transitions. [2021-06-12 20:03:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:23,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:23,706 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:23,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:23,906 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 893022698, now seen corresponding path program 365 times [2021-06-12 20:03:23,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:23,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954804312] [2021-06-12 20:03:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:24,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:24,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954804312] [2021-06-12 20:03:24,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954804312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961357494] [2021-06-12 20:03:24,051 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 20:03:24,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:24,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:24,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,136 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 18 treesize of output 14 [2021-06-12 20:03:24,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:24,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,143 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 17 treesize of output 13 [2021-06-12 20:03:24,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,146 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 18 treesize of output 14 [2021-06-12 20:03:24,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:24,194 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:03:24,351 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,354 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 27 treesize of output 21 [2021-06-12 20:03:24,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,357 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 20 treesize of output 16 [2021-06-12 20:03:24,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,383 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 12 treesize of output 8 [2021-06-12 20:03:24,384 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,387 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 11 treesize of output 7 [2021-06-12 20:03:24,388 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:24,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:24,410 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 20:03:24,410 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-12 20:03:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961357494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:24,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:24,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366959250] [2021-06-12 20:03:24,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:24,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:24,459 INFO L87 Difference]: Start difference. First operand 1203 states and 3883 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 20:03:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:24,844 INFO L93 Difference]: Finished difference Result 1384 states and 4328 transitions. [2021-06-12 20:03:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:24,844 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 24 [2021-06-12 20:03:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:24,846 INFO L225 Difference]: With dead ends: 1384 [2021-06-12 20:03:24,846 INFO L226 Difference]: Without dead ends: 1337 [2021-06-12 20:03:24,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-06-12 20:03:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1197. [2021-06-12 20:03:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.234113712374582) internal successors, (3868), 1196 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3868 transitions. [2021-06-12 20:03:24,859 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3868 transitions. Word has length 24 [2021-06-12 20:03:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:24,859 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3868 transitions. [2021-06-12 20:03:24,859 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 20:03:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3868 transitions. [2021-06-12 20:03:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:24,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:24,860 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:25,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2959 [2021-06-12 20:03:25,060 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1112318674, now seen corresponding path program 366 times [2021-06-12 20:03:25,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:25,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116708313] [2021-06-12 20:03:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:25,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:25,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116708313] [2021-06-12 20:03:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116708313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799266890] [2021-06-12 20:03:25,217 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 20:03:25,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:03:25,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:25,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:25,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,306 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 18 treesize of output 14 [2021-06-12 20:03:25,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,329 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 20:03:25,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:03:25,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,447 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 20:03:25,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:25,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,478 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 11 treesize of output 7 [2021-06-12 20:03:25,479 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:25,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,481 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 7 [2021-06-12 20:03:25,482 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:25,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,506 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 20:03:25,506 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-12 20:03:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:25,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799266890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:25,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:25,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589087414] [2021-06-12 20:03:25,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:25,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:25,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:25,550 INFO L87 Difference]: Start difference. First operand 1197 states and 3868 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:26,073 INFO L93 Difference]: Finished difference Result 1421 states and 4445 transitions. [2021-06-12 20:03:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:03:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:26,075 INFO L225 Difference]: With dead ends: 1421 [2021-06-12 20:03:26,075 INFO L226 Difference]: Without dead ends: 1339 [2021-06-12 20:03:26,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:03:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-12 20:03:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1208. [2021-06-12 20:03:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.235294117647059) internal successors, (3905), 1207 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 3905 transitions. [2021-06-12 20:03:26,087 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 3905 transitions. Word has length 24 [2021-06-12 20:03:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:26,087 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 3905 transitions. [2021-06-12 20:03:26,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 3905 transitions. [2021-06-12 20:03:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:26,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:26,089 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:26,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:26,293 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -921317806, now seen corresponding path program 367 times [2021-06-12 20:03:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140016216] [2021-06-12 20:03:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:26,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:26,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140016216] [2021-06-12 20:03:26,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140016216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:26,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383678945] [2021-06-12 20:03:26,437 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 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 20:03:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,521 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 17 treesize of output 13 [2021-06-12 20:03:26,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,524 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 18 treesize of output 14 [2021-06-12 20:03:26,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,528 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 17 treesize of output 13 [2021-06-12 20:03:26,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,531 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 18 treesize of output 14 [2021-06-12 20:03:26,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:26,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:26,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:03:26,754 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:26,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,757 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 20:03:26,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:26,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:26,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,789 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 11 treesize of output 7 [2021-06-12 20:03:26,790 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:26,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:26,794 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:26,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:26,819 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 20:03:26,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-12 20:03:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:26,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383678945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:26,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:26,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:26,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539237108] [2021-06-12 20:03:26,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:26,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:26,866 INFO L87 Difference]: Start difference. First operand 1208 states and 3905 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 20:03:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:27,240 INFO L93 Difference]: Finished difference Result 1414 states and 4478 transitions. [2021-06-12 20:03:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:27,240 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 24 [2021-06-12 20:03:27,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:27,242 INFO L225 Difference]: With dead ends: 1414 [2021-06-12 20:03:27,242 INFO L226 Difference]: Without dead ends: 1356 [2021-06-12 20:03:27,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-12 20:03:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1197. [2021-06-12 20:03:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.234113712374582) internal successors, (3868), 1196 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3868 transitions. [2021-06-12 20:03:27,254 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3868 transitions. Word has length 24 [2021-06-12 20:03:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:27,255 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3868 transitions. [2021-06-12 20:03:27,255 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 20:03:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3868 transitions. [2021-06-12 20:03:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:27,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:27,256 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:27,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-06-12 20:03:27,457 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1095209976, now seen corresponding path program 368 times [2021-06-12 20:03:27,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:27,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387343314] [2021-06-12 20:03:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:27,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387343314] [2021-06-12 20:03:27,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387343314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392144231] [2021-06-12 20:03:27,600 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 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 20:03:27,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:27,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:27,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:27,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:27,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,695 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 18 treesize of output 14 [2021-06-12 20:03:27,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,699 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 17 treesize of output 13 [2021-06-12 20:03:27,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,702 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 18 treesize of output 14 [2021-06-12 20:03:27,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:27,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:03:27,853 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-06-12 20:03:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:27,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,862 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 20:03:27,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,866 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 20 treesize of output 16 [2021-06-12 20:03:27,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,871 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 20 treesize of output 16 [2021-06-12 20:03:27,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,875 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 19 treesize of output 15 [2021-06-12 20:03:27,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,880 INFO L173 IndexEqualityManager]: detected equality via solver [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 19 treesize of output 15 [2021-06-12 20:03:27,882 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,886 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 20 treesize of output 16 [2021-06-12 20:03:27,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,890 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 19 treesize of output 15 [2021-06-12 20:03:27,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,066 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-12 20:03:28,066 INFO L628 ElimStorePlain]: treesize reduction 169, result has 54.2 percent of original size [2021-06-12 20:03:28,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:28,071 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:28,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:28,076 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,079 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 12 treesize of output 8 [2021-06-12 20:03:28,080 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:28,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:28,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:03:28,155 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:96 [2021-06-12 20:03:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:28,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392144231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:28,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:28,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377603459] [2021-06-12 20:03:28,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:28,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:28,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:28,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:28,295 INFO L87 Difference]: Start difference. First operand 1197 states and 3868 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 20:03:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:28,823 INFO L93 Difference]: Finished difference Result 1560 states and 4837 transitions. [2021-06-12 20:03:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:03:28,824 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 24 [2021-06-12 20:03:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:28,826 INFO L225 Difference]: With dead ends: 1560 [2021-06-12 20:03:28,826 INFO L226 Difference]: Without dead ends: 1472 [2021-06-12 20:03:28,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-12 20:03:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1202. [2021-06-12 20:03:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.2422980849292258) internal successors, (3894), 1201 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3894 transitions. [2021-06-12 20:03:28,839 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3894 transitions. Word has length 24 [2021-06-12 20:03:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:28,839 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 3894 transitions. [2021-06-12 20:03:28,839 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 20:03:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3894 transitions. [2021-06-12 20:03:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:28,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:28,840 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:29,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2982,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:29,041 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1975483512, now seen corresponding path program 369 times [2021-06-12 20:03:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:29,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840474987] [2021-06-12 20:03:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:29,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840474987] [2021-06-12 20:03:29,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840474987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380433375] [2021-06-12 20:03:29,254 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 20:03:29,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:29,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:29,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,340 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 17 treesize of output 13 [2021-06-12 20:03:29,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,343 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 18 treesize of output 14 [2021-06-12 20:03:29,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:29,367 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 20:03:29,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:03:29,421 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:29,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,424 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 20:03:29,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,428 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 19 treesize of output 15 [2021-06-12 20:03:29,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,432 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 20 treesize of output 16 [2021-06-12 20:03:29,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,435 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 20 treesize of output 16 [2021-06-12 20:03:29,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:29,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:29,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,498 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 12 treesize of output 8 [2021-06-12 20:03:29,499 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,502 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 11 treesize of output 7 [2021-06-12 20:03:29,503 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,507 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 7 [2021-06-12 20:03:29,508 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:29,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:29,511 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 12 treesize of output 8 [2021-06-12 20:03:29,512 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:29,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:29,568 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 20:03:29,568 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-06-12 20:03:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380433375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:29,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:29,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096697350] [2021-06-12 20:03:29,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:29,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:29,692 INFO L87 Difference]: Start difference. First operand 1202 states and 3894 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:30,162 INFO L93 Difference]: Finished difference Result 1555 states and 4841 transitions. [2021-06-12 20:03:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:03:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:30,165 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 20:03:30,165 INFO L226 Difference]: Without dead ends: 1517 [2021-06-12 20:03:30,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-06-12 20:03:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1202. [2021-06-12 20:03:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.2431307243963365) internal successors, (3895), 1201 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3895 transitions. [2021-06-12 20:03:30,178 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3895 transitions. Word has length 24 [2021-06-12 20:03:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:30,178 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 3895 transitions. [2021-06-12 20:03:30,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3895 transitions. [2021-06-12 20:03:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:30,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:30,180 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:30,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2989,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:30,380 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:30,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2039059264, now seen corresponding path program 370 times [2021-06-12 20:03:30,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:30,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924691916] [2021-06-12 20:03:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:30,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924691916] [2021-06-12 20:03:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924691916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137286782] [2021-06-12 20:03:30,529 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 20:03:30,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:30,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,623 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 17 treesize of output 13 [2021-06-12 20:03:30,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,626 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 17 treesize of output 13 [2021-06-12 20:03:30,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,651 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 20:03:30,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-12 20:03:30,709 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-12 20:03:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,712 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 20:03:30,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,715 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 19 treesize of output 15 [2021-06-12 20:03:30,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,744 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 11 treesize of output 7 [2021-06-12 20:03:30,745 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:30,749 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:30,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:30,773 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 20:03:30,773 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-12 20:03:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:30,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137286782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:30,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001641334] [2021-06-12 20:03:30,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:30,864 INFO L87 Difference]: Start difference. First operand 1202 states and 3895 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:31,067 INFO L93 Difference]: Finished difference Result 1391 states and 4402 transitions. [2021-06-12 20:03:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:31,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:31,069 INFO L225 Difference]: With dead ends: 1391 [2021-06-12 20:03:31,069 INFO L226 Difference]: Without dead ends: 1353 [2021-06-12 20:03:31,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-12 20:03:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1194. [2021-06-12 20:03:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 3.22883487007544) internal successors, (3852), 1193 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3852 transitions. [2021-06-12 20:03:31,082 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3852 transitions. Word has length 24 [2021-06-12 20:03:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:31,082 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 3852 transitions. [2021-06-12 20:03:31,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3852 transitions. [2021-06-12 20:03:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:31,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:31,083 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:31,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2998 [2021-06-12 20:03:31,284 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -591855382, now seen corresponding path program 371 times [2021-06-12 20:03:31,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:31,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303255940] [2021-06-12 20:03:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:31,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303255940] [2021-06-12 20:03:31,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303255940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216543144] [2021-06-12 20:03:31,407 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 20:03:31,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:31,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,506 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 17 treesize of output 13 [2021-06-12 20:03:31,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,515 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 1 xjuncts. [2021-06-12 20:03:31,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 20:03:31,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,542 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 19 treesize of output 15 [2021-06-12 20:03:31,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,545 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 19 treesize of output 15 [2021-06-12 20:03:31,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:31,578 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:31,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,581 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 11 treesize of output 7 [2021-06-12 20:03:31,582 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:31,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,608 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 20:03:31,609 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-06-12 20:03:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:31,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216543144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:31,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:31,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453791795] [2021-06-12 20:03:31,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:31,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:31,668 INFO L87 Difference]: Start difference. First operand 1194 states and 3852 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 20:03:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:32,010 INFO L93 Difference]: Finished difference Result 1370 states and 4379 transitions. [2021-06-12 20:03:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:32,011 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 24 [2021-06-12 20:03:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:32,012 INFO L225 Difference]: With dead ends: 1370 [2021-06-12 20:03:32,012 INFO L226 Difference]: Without dead ends: 1324 [2021-06-12 20:03:32,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-12 20:03:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1187. [2021-06-12 20:03:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.230185497470489) internal successors, (3831), 1186 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3831 transitions. [2021-06-12 20:03:32,024 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3831 transitions. Word has length 24 [2021-06-12 20:03:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:32,024 INFO L482 AbstractCegarLoop]: Abstraction has 1187 states and 3831 transitions. [2021-06-12 20:03:32,024 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 20:03:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3831 transitions. [2021-06-12 20:03:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:32,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:32,025 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:32,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:32,226 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash 39349120, now seen corresponding path program 372 times [2021-06-12 20:03:32,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:32,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548821561] [2021-06-12 20:03:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:32,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548821561] [2021-06-12 20:03:32,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548821561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943746984] [2021-06-12 20:03:32,357 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 20:03:32,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,441 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 18 treesize of output 14 [2021-06-12 20:03:32,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,445 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 18 treesize of output 14 [2021-06-12 20:03:32,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,448 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 17 treesize of output 13 [2021-06-12 20:03:32,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,451 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 17 treesize of output 13 [2021-06-12 20:03:32,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:32,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:03:32,606 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-12 20:03:32,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:32,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,614 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 20 treesize of output 16 [2021-06-12 20:03:32,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,618 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 20:03:32,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,621 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 19 treesize of output 15 [2021-06-12 20:03:32,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:32,679 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:32,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,682 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 12 treesize of output 8 [2021-06-12 20:03:32,683 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,687 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 7 [2021-06-12 20:03:32,688 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:32,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:32,692 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:32,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:32,743 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:193, output treesize:69 [2021-06-12 20:03:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:32,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943746984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:32,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:32,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731165323] [2021-06-12 20:03:32,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:32,874 INFO L87 Difference]: Start difference. First operand 1187 states and 3831 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 20:03:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:33,275 INFO L93 Difference]: Finished difference Result 1634 states and 5068 transitions. [2021-06-12 20:03:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:33,275 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 24 [2021-06-12 20:03:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:33,278 INFO L225 Difference]: With dead ends: 1634 [2021-06-12 20:03:33,278 INFO L226 Difference]: Without dead ends: 1541 [2021-06-12 20:03:33,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-06-12 20:03:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1198. [2021-06-12 20:03:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.239766081871345) internal successors, (3878), 1197 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3878 transitions. [2021-06-12 20:03:33,298 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3878 transitions. Word has length 24 [2021-06-12 20:03:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:33,298 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3878 transitions. [2021-06-12 20:03:33,298 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 20:03:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3878 transitions. [2021-06-12 20:03:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:33,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:33,299 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:33,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3008 [2021-06-12 20:03:33,500 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash 813553490, now seen corresponding path program 373 times [2021-06-12 20:03:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:33,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324588475] [2021-06-12 20:03:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:33,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324588475] [2021-06-12 20:03:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324588475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948265741] [2021-06-12 20:03:33,658 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 20:03:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:33,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,747 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 17 treesize of output 13 [2021-06-12 20:03:33,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,751 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 18 treesize of output 14 [2021-06-12 20:03:33,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,754 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 17 treesize of output 13 [2021-06-12 20:03:33,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,757 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 18 treesize of output 14 [2021-06-12 20:03:33,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:33,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:33,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-12 20:03:33,939 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-12 20:03:33,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:33,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,947 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 20:03:33,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,951 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 20:03:33,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,954 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 20:03:33,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,025 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-06-12 20:03:34,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:34,029 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:34,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,032 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 7 [2021-06-12 20:03:34,033 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:34,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:34,060 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 20:03:34,061 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:34 [2021-06-12 20:03:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948265741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:34,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:34,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38956615] [2021-06-12 20:03:34,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:34,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:34,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:34,134 INFO L87 Difference]: Start difference. First operand 1198 states and 3878 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:34,514 INFO L93 Difference]: Finished difference Result 1576 states and 4906 transitions. [2021-06-12 20:03:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:03:34,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:34,516 INFO L225 Difference]: With dead ends: 1576 [2021-06-12 20:03:34,516 INFO L226 Difference]: Without dead ends: 1460 [2021-06-12 20:03:34,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-06-12 20:03:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1187. [2021-06-12 20:03:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.230185497470489) internal successors, (3831), 1186 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3831 transitions. [2021-06-12 20:03:34,530 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3831 transitions. Word has length 24 [2021-06-12 20:03:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:34,530 INFO L482 AbstractCegarLoop]: Abstraction has 1187 states and 3831 transitions. [2021-06-12 20:03:34,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3831 transitions. [2021-06-12 20:03:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:34,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:34,531 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:34,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:34,732 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1073032214, now seen corresponding path program 374 times [2021-06-12 20:03:34,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:34,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350067787] [2021-06-12 20:03:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:34,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:34,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350067787] [2021-06-12 20:03:34,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350067787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949620118] [2021-06-12 20:03:34,923 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 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 20:03:34,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:35,003 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 20:03:35,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,006 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 20:03:35,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,009 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 19 treesize of output 15 [2021-06-12 20:03:35,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,012 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 20:03:35,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:35,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:35,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:03:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,247 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 20 treesize of output 16 [2021-06-12 20:03:35,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,250 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 20:03:35,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,325 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-06-12 20:03:35,325 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:03:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,328 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 20 treesize of output 16 [2021-06-12 20:03:35,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,331 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 20:03:35,332 INFO L550 ElimStorePlain]: Start of recursive call 5: 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 L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:35,365 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:35,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,367 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 12 treesize of output 8 [2021-06-12 20:03:35,368 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:35,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:35,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:35,398 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-12 20:03:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:35,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949620118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:35,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:35,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080752758] [2021-06-12 20:03:35,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:35,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:35,474 INFO L87 Difference]: Start difference. First operand 1187 states and 3831 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:35,864 INFO L93 Difference]: Finished difference Result 1325 states and 4218 transitions. [2021-06-12 20:03:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:35,866 INFO L225 Difference]: With dead ends: 1325 [2021-06-12 20:03:35,866 INFO L226 Difference]: Without dead ends: 1272 [2021-06-12 20:03:35,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-12 20:03:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1193. [2021-06-12 20:03:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2298657718120807) internal successors, (3850), 1192 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3850 transitions. [2021-06-12 20:03:35,878 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3850 transitions. Word has length 24 [2021-06-12 20:03:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:35,878 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3850 transitions. [2021-06-12 20:03:35,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3850 transitions. [2021-06-12 20:03:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:35,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:35,879 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:36,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:36,080 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1253604616, now seen corresponding path program 375 times [2021-06-12 20:03:36,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:36,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599975075] [2021-06-12 20:03:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:36,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:36,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599975075] [2021-06-12 20:03:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599975075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050199413] [2021-06-12 20:03:36,290 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 20:03:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:36,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:36,369 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 19 treesize of output 15 [2021-06-12 20:03:36,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,372 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 19 treesize of output 15 [2021-06-12 20:03:36,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,398 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 20:03:36,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:03:36,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,461 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 20:03:36,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,464 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 20 treesize of output 16 [2021-06-12 20:03:36,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,518 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 20 treesize of output 16 [2021-06-12 20:03:36,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,521 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 19 treesize of output 15 [2021-06-12 20:03:36,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,572 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 7 [2021-06-12 20:03:36,573 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:36,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,576 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 13 treesize of output 9 [2021-06-12 20:03:36,577 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:36,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,626 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 13 treesize of output 9 [2021-06-12 20:03:36,627 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,630 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 8 [2021-06-12 20:03:36,631 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:36,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:36,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:36,684 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:03:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:36,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050199413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:36,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:36,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528285934] [2021-06-12 20:03:36,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:36,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:36,832 INFO L87 Difference]: Start difference. First operand 1193 states and 3850 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:37,231 INFO L93 Difference]: Finished difference Result 1354 states and 4283 transitions. [2021-06-12 20:03:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:37,233 INFO L225 Difference]: With dead ends: 1354 [2021-06-12 20:03:37,233 INFO L226 Difference]: Without dead ends: 1288 [2021-06-12 20:03:37,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-12 20:03:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1190. [2021-06-12 20:03:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.229604709840202) internal successors, (3840), 1189 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3840 transitions. [2021-06-12 20:03:37,244 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3840 transitions. Word has length 24 [2021-06-12 20:03:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:37,245 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3840 transitions. [2021-06-12 20:03:37,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3840 transitions. [2021-06-12 20:03:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:37,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:37,246 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:37,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-06-12 20:03:37,446 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash -772244488, now seen corresponding path program 376 times [2021-06-12 20:03:37,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:37,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858950833] [2021-06-12 20:03:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:37,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:37,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858950833] [2021-06-12 20:03:37,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858950833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053841480] [2021-06-12 20:03:37,658 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 20:03:37,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,759 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 17 treesize of output 13 [2021-06-12 20:03:37,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:37,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,816 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 17 treesize of output 13 [2021-06-12 20:03:37,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,819 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 18 treesize of output 14 [2021-06-12 20:03:37,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:37,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:37,868 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:03:37,965 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-12 20:03:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,969 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 20 treesize of output 16 [2021-06-12 20:03:37,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,973 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 20 treesize of output 16 [2021-06-12 20:03:37,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,977 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 20:03:37,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,981 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 20:03:37,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:38,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,035 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 12 treesize of output 8 [2021-06-12 20:03:38,036 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:38,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,039 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 7 [2021-06-12 20:03:38,040 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:38,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:38,045 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:38,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:38,048 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 11 treesize of output 7 [2021-06-12 20:03:38,049 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:38,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:38,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:38,095 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-06-12 20:03:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:38,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053841480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:38,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:38,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:38,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781900594] [2021-06-12 20:03:38,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:38,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:38,236 INFO L87 Difference]: Start difference. First operand 1190 states and 3840 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:38,718 INFO L93 Difference]: Finished difference Result 1541 states and 4805 transitions. [2021-06-12 20:03:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:38,720 INFO L225 Difference]: With dead ends: 1541 [2021-06-12 20:03:38,720 INFO L226 Difference]: Without dead ends: 1448 [2021-06-12 20:03:38,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-06-12 20:03:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1201. [2021-06-12 20:03:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.2391666666666667) internal successors, (3887), 1200 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3887 transitions. [2021-06-12 20:03:38,734 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3887 transitions. Word has length 24 [2021-06-12 20:03:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:38,734 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 3887 transitions. [2021-06-12 20:03:38,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3887 transitions. [2021-06-12 20:03:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:38,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:38,735 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:38,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-12 20:03:38,936 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1959882, now seen corresponding path program 377 times [2021-06-12 20:03:38,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:38,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065090306] [2021-06-12 20:03:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:39,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:39,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065090306] [2021-06-12 20:03:39,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065090306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081369672] [2021-06-12 20:03:39,180 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 20:03:39,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:39,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,270 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 18 treesize of output 14 [2021-06-12 20:03:39,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:39,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,293 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 20:03:39,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 20:03:39,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,356 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 19 treesize of output 15 [2021-06-12 20:03:39,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,360 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 19 treesize of output 15 [2021-06-12 20:03:39,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:39,394 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:39,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:39,398 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:39,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:39,424 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 20:03:39,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-12 20:03:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:39,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081369672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911908187] [2021-06-12 20:03:39,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:39,497 INFO L87 Difference]: Start difference. First operand 1201 states and 3887 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:40,027 INFO L93 Difference]: Finished difference Result 1387 states and 4436 transitions. [2021-06-12 20:03:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:40,029 INFO L225 Difference]: With dead ends: 1387 [2021-06-12 20:03:40,029 INFO L226 Difference]: Without dead ends: 1341 [2021-06-12 20:03:40,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 598.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-12 20:03:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1188. [2021-06-12 20:03:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.230834035383319) internal successors, (3835), 1187 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3835 transitions. [2021-06-12 20:03:40,049 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3835 transitions. Word has length 24 [2021-06-12 20:03:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:40,049 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3835 transitions. [2021-06-12 20:03:40,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3835 transitions. [2021-06-12 20:03:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:40,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:40,050 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:40,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-12 20:03:40,251 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash 745828416, now seen corresponding path program 378 times [2021-06-12 20:03:40,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:40,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446055618] [2021-06-12 20:03:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:40,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:40,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446055618] [2021-06-12 20:03:40,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446055618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:40,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564101495] [2021-06-12 20:03:40,425 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 20:03:40,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:03:40,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:40,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,492 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 20:03:40,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,495 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 20:03:40,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,517 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 20:03:40,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-12 20:03:40,663 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1346], 1=[o_2, v_prenex_1347]} [2021-06-12 20:03:40,665 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 19 treesize of output 15 [2021-06-12 20:03:40,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,668 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 20 treesize of output 16 [2021-06-12 20:03:40,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,718 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 20 treesize of output 16 [2021-06-12 20:03:40,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,721 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 20:03:40,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:40,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,772 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 7 [2021-06-12 20:03:40,773 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:40,777 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:40,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,821 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 13 treesize of output 9 [2021-06-12 20:03:40,822 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:40,825 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 12 treesize of output 8 [2021-06-12 20:03:40,826 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:40,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:40,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:40,863 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-12 20:03:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:40,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564101495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:40,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:40,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:40,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762365363] [2021-06-12 20:03:40,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:40,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:40,968 INFO L87 Difference]: Start difference. First operand 1188 states and 3835 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:41,714 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-06-12 20:03:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:41,994 INFO L93 Difference]: Finished difference Result 1627 states and 5131 transitions. [2021-06-12 20:03:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:41,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:41,996 INFO L225 Difference]: With dead ends: 1627 [2021-06-12 20:03:41,996 INFO L226 Difference]: Without dead ends: 1553 [2021-06-12 20:03:41,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1081.8ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-12 20:03:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1191. [2021-06-12 20:03:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.230252100840336) internal successors, (3844), 1190 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3844 transitions. [2021-06-12 20:03:42,009 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3844 transitions. Word has length 24 [2021-06-12 20:03:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:42,009 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3844 transitions. [2021-06-12 20:03:42,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3844 transitions. [2021-06-12 20:03:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:42,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:42,011 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:42,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,211 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash -310029804, now seen corresponding path program 379 times [2021-06-12 20:03:42,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:42,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307434722] [2021-06-12 20:03:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:42,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:42,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307434722] [2021-06-12 20:03:42,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307434722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:42,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870799868] [2021-06-12 20:03:42,410 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 20:03:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:42,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:42,501 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 20:03:42,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,505 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 19 treesize of output 15 [2021-06-12 20:03:42,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,508 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 19 treesize of output 15 [2021-06-12 20:03:42,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,511 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 19 treesize of output 15 [2021-06-12 20:03:42,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:42,568 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-12 20:03:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,737 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 20 treesize of output 16 [2021-06-12 20:03:42,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,741 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 20:03:42,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,811 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.1 percent of original size [2021-06-12 20:03:42,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:42,817 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:42,819 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 11 treesize of output 7 [2021-06-12 20:03:42,821 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:42,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,853 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 11 treesize of output 9 [2021-06-12 20:03:42,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:42,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:42,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1351 vanished before elimination [2021-06-12 20:03:42,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:42,883 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-12 20:03:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:42,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870799868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:42,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:42,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873456249] [2021-06-12 20:03:42,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:42,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:42,960 INFO L87 Difference]: Start difference. First operand 1191 states and 3844 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:43,330 INFO L93 Difference]: Finished difference Result 1415 states and 4517 transitions. [2021-06-12 20:03:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:43,332 INFO L225 Difference]: With dead ends: 1415 [2021-06-12 20:03:43,332 INFO L226 Difference]: Without dead ends: 1362 [2021-06-12 20:03:43,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-12 20:03:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1197. [2021-06-12 20:03:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.229933110367893) internal successors, (3863), 1196 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3863 transitions. [2021-06-12 20:03:43,344 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3863 transitions. Word has length 24 [2021-06-12 20:03:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:43,344 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3863 transitions. [2021-06-12 20:03:43,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3863 transitions. [2021-06-12 20:03:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:43,345 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:43,345 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:43,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3070,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:43,545 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2016607026, now seen corresponding path program 380 times [2021-06-12 20:03:43,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:43,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325773180] [2021-06-12 20:03:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:43,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:43,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325773180] [2021-06-12 20:03:43,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325773180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:43,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020614952] [2021-06-12 20:03:43,768 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 20:03:43,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:43,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:43,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:43,859 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 19 treesize of output 15 [2021-06-12 20:03:43,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,861 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 20:03:43,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:43,887 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 20:03:43,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-12 20:03:43,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:43,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,954 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 20 treesize of output 16 [2021-06-12 20:03:43,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,012 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 7 [2021-06-12 20:03:44,013 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:44,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,016 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 13 treesize of output 9 [2021-06-12 20:03:44,017 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:44,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:44,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,074 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 20:03:44,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,123 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 13 treesize of output 9 [2021-06-12 20:03:44,124 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:44,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,127 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 7 [2021-06-12 20:03:44,128 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:44,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:44,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:44,173 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-12 20:03:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020614952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:44,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:44,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384865642] [2021-06-12 20:03:44,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:44,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:44,321 INFO L87 Difference]: Start difference. First operand 1197 states and 3863 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:44,708 INFO L93 Difference]: Finished difference Result 1444 states and 4582 transitions. [2021-06-12 20:03:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:44,710 INFO L225 Difference]: With dead ends: 1444 [2021-06-12 20:03:44,710 INFO L226 Difference]: Without dead ends: 1378 [2021-06-12 20:03:44,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-12 20:03:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1194. [2021-06-12 20:03:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 3.2296730930427495) internal successors, (3853), 1193 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3853 transitions. [2021-06-12 20:03:44,722 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3853 transitions. Word has length 24 [2021-06-12 20:03:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:44,722 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 3853 transitions. [2021-06-12 20:03:44,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3853 transitions. [2021-06-12 20:03:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:44,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:44,723 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:44,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-12 20:03:44,924 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash -9242078, now seen corresponding path program 381 times [2021-06-12 20:03:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:44,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883878150] [2021-06-12 20:03:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:45,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:45,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883878150] [2021-06-12 20:03:45,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883878150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:45,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490875517] [2021-06-12 20:03:45,128 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 20:03:45,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,261 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 20:03:45,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,272 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 18 treesize of output 14 [2021-06-12 20:03:45,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:45,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,330 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 18 treesize of output 14 [2021-06-12 20:03:45,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:45,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:03:45,477 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-12 20:03:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,481 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 20 treesize of output 16 [2021-06-12 20:03:45,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:45,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,489 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 20 treesize of output 16 [2021-06-12 20:03:45,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,492 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 20:03:45,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:45,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,545 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 11 treesize of output 7 [2021-06-12 20:03:45,547 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,550 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 11 treesize of output 7 [2021-06-12 20:03:45,551 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:45,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,555 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 12 treesize of output 8 [2021-06-12 20:03:45,556 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:45,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:45,559 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 12 treesize of output 8 [2021-06-12 20:03:45,560 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:45,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:45,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:45,607 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-06-12 20:03:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:45,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490875517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:45,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:45,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:45,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360301225] [2021-06-12 20:03:45,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:45,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:45,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:45,747 INFO L87 Difference]: Start difference. First operand 1194 states and 3853 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:46,451 INFO L93 Difference]: Finished difference Result 1631 states and 5104 transitions. [2021-06-12 20:03:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:46,453 INFO L225 Difference]: With dead ends: 1631 [2021-06-12 20:03:46,453 INFO L226 Difference]: Without dead ends: 1538 [2021-06-12 20:03:46,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-12 20:03:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1205. [2021-06-12 20:03:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 3.2392026578073088) internal successors, (3900), 1204 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3900 transitions. [2021-06-12 20:03:46,467 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3900 transitions. Word has length 24 [2021-06-12 20:03:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:46,467 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 3900 transitions. [2021-06-12 20:03:46,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3900 transitions. [2021-06-12 20:03:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:46,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:46,469 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:46,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-06-12 20:03:46,669 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash 764962292, now seen corresponding path program 382 times [2021-06-12 20:03:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:46,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907238828] [2021-06-12 20:03:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:46,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:46,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907238828] [2021-06-12 20:03:46,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907238828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:46,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377237258] [2021-06-12 20:03:46,927 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 20:03:46,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:46,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,069 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 18 treesize of output 14 [2021-06-12 20:03:47,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,073 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 17 treesize of output 13 [2021-06-12 20:03:47,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:47,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,128 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 18 treesize of output 14 [2021-06-12 20:03:47,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,131 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 17 treesize of output 13 [2021-06-12 20:03:47,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:47,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:47,181 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:03:47,306 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-12 20:03:47,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,309 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 20:03:47,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,313 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 20:03:47,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:03:47,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,320 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 19 treesize of output 15 [2021-06-12 20:03:47,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,385 INFO L628 ElimStorePlain]: treesize reduction 97, result has 41.2 percent of original size [2021-06-12 20:03:47,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,387 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 11 treesize of output 7 [2021-06-12 20:03:47,388 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:47,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:47,413 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 20:03:47,414 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-06-12 20:03:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:47,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377237258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:47,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:47,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:47,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476564610] [2021-06-12 20:03:47,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:47,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:47,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:47,492 INFO L87 Difference]: Start difference. First operand 1205 states and 3900 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:47,973 INFO L93 Difference]: Finished difference Result 1477 states and 4709 transitions. [2021-06-12 20:03:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:47,975 INFO L225 Difference]: With dead ends: 1477 [2021-06-12 20:03:47,975 INFO L226 Difference]: Without dead ends: 1405 [2021-06-12 20:03:47,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 653.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-12 20:03:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1188. [2021-06-12 20:03:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.230834035383319) internal successors, (3835), 1187 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3835 transitions. [2021-06-12 20:03:47,988 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3835 transitions. Word has length 24 [2021-06-12 20:03:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:47,988 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3835 transitions. [2021-06-12 20:03:47,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3835 transitions. [2021-06-12 20:03:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:47,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:47,989 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:48,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-06-12 20:03:48,190 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1588671568, now seen corresponding path program 383 times [2021-06-12 20:03:48,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:48,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91855555] [2021-06-12 20:03:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:48,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:48,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91855555] [2021-06-12 20:03:48,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91855555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:48,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525148070] [2021-06-12 20:03:48,329 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 20:03:48,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:48,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:03:48,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,448 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 26 treesize of output 20 [2021-06-12 20:03:48,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,451 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 25 treesize of output 19 [2021-06-12 20:03:48,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:48,473 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 20:03:48,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:61 [2021-06-12 20:03:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,563 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 27 treesize of output 21 [2021-06-12 20:03:48,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,566 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 27 treesize of output 21 [2021-06-12 20:03:48,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,594 INFO L628 ElimStorePlain]: treesize reduction 49, result has 41.0 percent of original size [2021-06-12 20:03:48,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:48,596 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 7 [2021-06-12 20:03:48,597 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:48,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:48,607 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 20:03:48,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-06-12 20:03:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:48,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525148070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:48,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:48,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:48,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059702835] [2021-06-12 20:03:48,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:48,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:48,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:48,640 INFO L87 Difference]: Start difference. First operand 1188 states and 3835 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:48,835 INFO L93 Difference]: Finished difference Result 1281 states and 4051 transitions. [2021-06-12 20:03:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:48,837 INFO L225 Difference]: With dead ends: 1281 [2021-06-12 20:03:48,837 INFO L226 Difference]: Without dead ends: 1222 [2021-06-12 20:03:48,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-12 20:03:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1189. [2021-06-12 20:03:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.2314814814814814) internal successors, (3839), 1188 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3839 transitions. [2021-06-12 20:03:48,849 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3839 transitions. Word has length 24 [2021-06-12 20:03:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:48,849 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3839 transitions. [2021-06-12 20:03:48,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3839 transitions. [2021-06-12 20:03:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:48,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:48,850 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:49,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-06-12 20:03:49,061 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 968323912, now seen corresponding path program 384 times [2021-06-12 20:03:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:49,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132943559] [2021-06-12 20:03:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:49,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:49,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132943559] [2021-06-12 20:03:49,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132943559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629824485] [2021-06-12 20:03:49,228 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 20:03:49,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:49,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,334 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 18 treesize of output 14 [2021-06-12 20:03:49,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,337 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 20:03:49,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:49,356 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 20:03:49,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:49 [2021-06-12 20:03:49,408 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:03:49,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,411 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 20:03:49,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,414 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 20 treesize of output 16 [2021-06-12 20:03:49,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,418 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 19 treesize of output 15 [2021-06-12 20:03:49,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,421 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 20 treesize of output 16 [2021-06-12 20:03:49,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:49,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:49,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,476 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 13 treesize of output 9 [2021-06-12 20:03:49,477 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:49,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,480 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 12 treesize of output 8 [2021-06-12 20:03:49,481 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:49,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:49,485 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:49,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:49,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:49,489 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:49,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:49,537 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 20:03:49,538 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-06-12 20:03:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629824485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:49,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644317596] [2021-06-12 20:03:49,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:49,632 INFO L87 Difference]: Start difference. First operand 1189 states and 3839 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:49,991 INFO L93 Difference]: Finished difference Result 1345 states and 4258 transitions. [2021-06-12 20:03:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:49,993 INFO L225 Difference]: With dead ends: 1345 [2021-06-12 20:03:49,993 INFO L226 Difference]: Without dead ends: 1279 [2021-06-12 20:03:49,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-12 20:03:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1189. [2021-06-12 20:03:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.2314814814814814) internal successors, (3839), 1188 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3839 transitions. [2021-06-12 20:03:50,005 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3839 transitions. Word has length 24 [2021-06-12 20:03:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:50,005 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3839 transitions. [2021-06-12 20:03:50,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3839 transitions. [2021-06-12 20:03:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:50,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:50,006 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:50,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:50,207 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash 430831056, now seen corresponding path program 385 times [2021-06-12 20:03:50,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:50,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272012414] [2021-06-12 20:03:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:50,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:50,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272012414] [2021-06-12 20:03:50,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272012414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381400270] [2021-06-12 20:03:50,374 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 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 20:03:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:50,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,475 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 27 treesize of output 21 [2021-06-12 20:03:50,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,485 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 1 xjuncts. [2021-06-12 20:03:50,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-12 20:03:50,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:50,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,536 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 19 treesize of output 15 [2021-06-12 20:03:50,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,562 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 11 treesize of output 7 [2021-06-12 20:03:50,563 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,565 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 13 treesize of output 9 [2021-06-12 20:03:50,566 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:50,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:50,590 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 20:03:50,590 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-06-12 20:03:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381400270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:50,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:50,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189327855] [2021-06-12 20:03:50,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:50,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:50,654 INFO L87 Difference]: Start difference. First operand 1189 states and 3839 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:50,907 INFO L93 Difference]: Finished difference Result 1277 states and 4055 transitions. [2021-06-12 20:03:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:50,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:50,909 INFO L225 Difference]: With dead ends: 1277 [2021-06-12 20:03:50,909 INFO L226 Difference]: Without dead ends: 1238 [2021-06-12 20:03:50,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-12 20:03:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1189. [2021-06-12 20:03:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.2314814814814814) internal successors, (3839), 1188 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3839 transitions. [2021-06-12 20:03:50,921 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3839 transitions. Word has length 24 [2021-06-12 20:03:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:50,921 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3839 transitions. [2021-06-12 20:03:50,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3839 transitions. [2021-06-12 20:03:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:50,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:50,923 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:51,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-12 20:03:51,123 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1817593426, now seen corresponding path program 386 times [2021-06-12 20:03:51,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:51,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279786440] [2021-06-12 20:03:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:51,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:51,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279786440] [2021-06-12 20:03:51,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279786440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521134041] [2021-06-12 20:03:51,279 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 20:03:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:51,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,371 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 17 treesize of output 13 [2021-06-12 20:03:51,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,374 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 18 treesize of output 14 [2021-06-12 20:03:51,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:51,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,381 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 18 treesize of output 14 [2021-06-12 20:03:51,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:51,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 20:03:51,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,617 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 27 treesize of output 21 [2021-06-12 20:03:51,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,627 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 22 treesize of output 14 [2021-06-12 20:03:51,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:51,635 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 20:03:51,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-06-12 20:03:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:51,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521134041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:51,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:51,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729622001] [2021-06-12 20:03:51,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:51,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:51,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:51,670 INFO L87 Difference]: Start difference. First operand 1189 states and 3839 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:52,039 INFO L93 Difference]: Finished difference Result 1305 states and 4135 transitions. [2021-06-12 20:03:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:52,041 INFO L225 Difference]: With dead ends: 1305 [2021-06-12 20:03:52,041 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 20:03:52,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 20:03:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1204. [2021-06-12 20:03:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.231088944305902) internal successors, (3887), 1203 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 3887 transitions. [2021-06-12 20:03:52,053 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 3887 transitions. Word has length 24 [2021-06-12 20:03:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:52,053 INFO L482 AbstractCegarLoop]: Abstraction has 1204 states and 3887 transitions. [2021-06-12 20:03:52,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 3887 transitions. [2021-06-12 20:03:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:52,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:52,055 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:52,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:52,255 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash 79621610, now seen corresponding path program 387 times [2021-06-12 20:03:52,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:52,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711196257] [2021-06-12 20:03:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:52,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:52,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711196257] [2021-06-12 20:03:52,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711196257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:52,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046690235] [2021-06-12 20:03:52,436 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 20:03:52,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:52,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:52,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,518 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 18 treesize of output 14 [2021-06-12 20:03:52,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,521 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 17 treesize of output 13 [2021-06-12 20:03:52,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,543 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 20:03:52,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:03:52,650 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:03:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,653 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 20:03:52,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,657 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 20:03:52,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,661 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 20 treesize of output 16 [2021-06-12 20:03:52,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,664 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 20:03:52,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:52,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,718 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 13 treesize of output 9 [2021-06-12 20:03:52,719 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:52,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:52,723 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,726 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 12 treesize of output 8 [2021-06-12 20:03:52,727 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:52,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:52,730 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 13 treesize of output 9 [2021-06-12 20:03:52,731 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:52,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:52,779 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 20:03:52,779 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-06-12 20:03:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046690235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:52,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:52,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063848603] [2021-06-12 20:03:52,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:52,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:52,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:52,866 INFO L87 Difference]: Start difference. First operand 1204 states and 3887 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:53,443 INFO L93 Difference]: Finished difference Result 1539 states and 4725 transitions. [2021-06-12 20:03:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:03:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:03:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:53,445 INFO L225 Difference]: With dead ends: 1539 [2021-06-12 20:03:53,445 INFO L226 Difference]: Without dead ends: 1446 [2021-06-12 20:03:53,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-06-12 20:03:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1202. [2021-06-12 20:03:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.2323064113238966) internal successors, (3882), 1201 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3882 transitions. [2021-06-12 20:03:53,458 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3882 transitions. Word has length 24 [2021-06-12 20:03:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:53,458 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 3882 transitions. [2021-06-12 20:03:53,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:03:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3882 transitions. [2021-06-12 20:03:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:53,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:53,460 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:53,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-06-12 20:03:53,660 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:53,660 INFO L82 PathProgramCache]: Analyzing trace with hash -414132176, now seen corresponding path program 388 times [2021-06-12 20:03:53,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:53,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676185504] [2021-06-12 20:03:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:53,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:53,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676185504] [2021-06-12 20:03:53,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676185504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:53,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98842047] [2021-06-12 20:03:53,798 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 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 20:03:53,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:53,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:53,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,890 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 18 treesize of output 14 [2021-06-12 20:03:53,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,893 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 17 treesize of output 13 [2021-06-12 20:03:53,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,897 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 17 treesize of output 13 [2021-06-12 20:03:53,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:53,900 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 18 treesize of output 14 [2021-06-12 20:03:53,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:53,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:53,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:53,947 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 20:03:54,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,105 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 20:03:54,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:03:54,116 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:54,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,125 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 20:03:54,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-12 20:03:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98842047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:54,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957737660] [2021-06-12 20:03:54,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:54,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:54,150 INFO L87 Difference]: Start difference. First operand 1202 states and 3882 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 20:03:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:54,329 INFO L93 Difference]: Finished difference Result 1329 states and 4195 transitions. [2021-06-12 20:03:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:54,329 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 24 [2021-06-12 20:03:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:54,331 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 20:03:54,331 INFO L226 Difference]: Without dead ends: 1298 [2021-06-12 20:03:54,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-06-12 20:03:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1197. [2021-06-12 20:03:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.2366220735785953) internal successors, (3871), 1196 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3871 transitions. [2021-06-12 20:03:54,343 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3871 transitions. Word has length 24 [2021-06-12 20:03:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:54,343 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3871 transitions. [2021-06-12 20:03:54,343 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 20:03:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3871 transitions. [2021-06-12 20:03:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:54,345 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:54,345 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:54,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-06-12 20:03:54,545 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:54,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1734718894, now seen corresponding path program 389 times [2021-06-12 20:03:54,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:54,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143095336] [2021-06-12 20:03:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:54,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143095336] [2021-06-12 20:03:54,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143095336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359014992] [2021-06-12 20:03:54,654 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 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 20:03:54,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:03:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:54,721 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 17 treesize of output 13 [2021-06-12 20:03:54,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,724 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 18 treesize of output 14 [2021-06-12 20:03:54,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,726 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 18 treesize of output 14 [2021-06-12 20:03:54,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,729 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 17 treesize of output 13 [2021-06-12 20:03:54,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:54,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-12 20:03:54,848 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 19 treesize of output 15 [2021-06-12 20:03:54,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,873 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 11 treesize of output 7 [2021-06-12 20:03:54,874 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:54,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,891 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 19 treesize of output 15 [2021-06-12 20:03:54,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,906 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 12 treesize of output 8 [2021-06-12 20:03:54,908 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:54,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:54,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:54,921 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:61, output treesize:31 [2021-06-12 20:03:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:54,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359014992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:54,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:54,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646544582] [2021-06-12 20:03:54,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:54,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:54,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:54,978 INFO L87 Difference]: Start difference. First operand 1197 states and 3871 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:03:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:55,338 INFO L93 Difference]: Finished difference Result 1427 states and 4465 transitions. [2021-06-12 20:03:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 24 [2021-06-12 20:03:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:55,340 INFO L225 Difference]: With dead ends: 1427 [2021-06-12 20:03:55,340 INFO L226 Difference]: Without dead ends: 1350 [2021-06-12 20:03:55,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-12 20:03:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1190. [2021-06-12 20:03:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.2321278385197645) internal successors, (3843), 1189 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3843 transitions. [2021-06-12 20:03:55,353 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3843 transitions. Word has length 24 [2021-06-12 20:03:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:55,353 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3843 transitions. [2021-06-12 20:03:55,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20:03:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3843 transitions. [2021-06-12 20:03:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:55,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:55,354 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:55,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3148 [2021-06-12 20:03:55,555 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1908611064, now seen corresponding path program 390 times [2021-06-12 20:03:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:55,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537174538] [2021-06-12 20:03:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:55,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:55,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537174538] [2021-06-12 20:03:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537174538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483318215] [2021-06-12 20:03:55,694 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 20:03:55,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:55,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:03:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:55,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,779 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 20:03:55,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:55,809 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 20:03:55,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:03:55,863 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:03:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,866 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 20 treesize of output 16 [2021-06-12 20:03:55,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,870 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 19 treesize of output 15 [2021-06-12 20:03:55,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,874 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 20:03:55,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:55,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:55,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,936 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 8 [2021-06-12 20:03:55,937 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:55,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,940 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 13 treesize of output 9 [2021-06-12 20:03:55,941 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,944 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 13 treesize of output 9 [2021-06-12 20:03:55,945 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,948 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 12 treesize of output 8 [2021-06-12 20:03:55,949 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:56,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:56,003 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 20:03:56,003 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-12 20:03:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483318215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:56,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:56,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:03:56,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133839477] [2021-06-12 20:03:56,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:56,136 INFO L87 Difference]: Start difference. First operand 1190 states and 3843 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 20:03:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:56,843 INFO L93 Difference]: Finished difference Result 1471 states and 4573 transitions. [2021-06-12 20:03:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:56,843 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 24 [2021-06-12 20:03:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:56,845 INFO L225 Difference]: With dead ends: 1471 [2021-06-12 20:03:56,845 INFO L226 Difference]: Without dead ends: 1383 [2021-06-12 20:03:56,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-06-12 20:03:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1195. [2021-06-12 20:03:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 3.2403685092127303) internal successors, (3869), 1194 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3869 transitions. [2021-06-12 20:03:56,857 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3869 transitions. Word has length 24 [2021-06-12 20:03:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:56,857 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3869 transitions. [2021-06-12 20:03:56,857 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 20:03:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3869 transitions. [2021-06-12 20:03:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:56,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:56,859 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:57,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-12 20:03:57,059 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1506082696, now seen corresponding path program 391 times [2021-06-12 20:03:57,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:57,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091709647] [2021-06-12 20:03:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:57,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:57,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091709647] [2021-06-12 20:03:57,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091709647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481216424] [2021-06-12 20:03:57,208 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 20:03:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:57,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,298 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 17 treesize of output 13 [2021-06-12 20:03:57,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:57,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,305 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 20:03:57,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,308 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 18 treesize of output 14 [2021-06-12 20:03:57,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:03:57,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-12 20:03:57,467 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 20:03:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:57,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,474 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 20 treesize of output 16 [2021-06-12 20:03:57,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,478 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 20:03:57,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,481 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 19 treesize of output 15 [2021-06-12 20:03:57,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:03:57,538 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,542 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 12 treesize of output 8 [2021-06-12 20:03:57,543 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:57,547 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:57,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,550 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 13 treesize of output 9 [2021-06-12 20:03:57,551 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:57,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:57,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:57,602 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-12 20:03:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:03:57,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481216424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:57,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:57,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297208937] [2021-06-12 20:03:57,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:57,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:57,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:57,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:57,699 INFO L87 Difference]: Start difference. First operand 1195 states and 3869 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 20:03:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:57,971 INFO L93 Difference]: Finished difference Result 1381 states and 4367 transitions. [2021-06-12 20:03:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:57,971 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 24 [2021-06-12 20:03:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:57,973 INFO L225 Difference]: With dead ends: 1381 [2021-06-12 20:03:57,973 INFO L226 Difference]: Without dead ends: 1362 [2021-06-12 20:03:57,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-12 20:03:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1190. [2021-06-12 20:03:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.2321278385197645) internal successors, (3843), 1189 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3843 transitions. [2021-06-12 20:03:57,986 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3843 transitions. Word has length 24 [2021-06-12 20:03:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:57,986 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3843 transitions. [2021-06-12 20:03:57,986 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 20:03:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3843 transitions. [2021-06-12 20:03:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:57,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:57,987 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:58,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-06-12 20:03:58,188 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1074839694, now seen corresponding path program 392 times [2021-06-12 20:03:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:58,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221960311] [2021-06-12 20:03:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:58,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:58,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221960311] [2021-06-12 20:03:58,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221960311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837576095] [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 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 20:03:58,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:58,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,423 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 19 treesize of output 15 [2021-06-12 20:03:58,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,429 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 20:03:58,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:58,457 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 20:03:58,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:03:58,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:58,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,556 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 29 treesize of output 23 [2021-06-12 20:03:58,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:58,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:03:58,585 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:58,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,588 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 11 treesize of output 7 [2021-06-12 20:03:58,589 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:58,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:58,613 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 20:03:58,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:97, output treesize:27 [2021-06-12 20:03:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:58,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837576095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:58,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:58,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57281993] [2021-06-12 20:03:58,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:58,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:58,662 INFO L87 Difference]: Start difference. First operand 1190 states and 3843 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 20:03:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:58,864 INFO L93 Difference]: Finished difference Result 1283 states and 4076 transitions. [2021-06-12 20:03:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:58,864 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 24 [2021-06-12 20:03:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:58,866 INFO L225 Difference]: With dead ends: 1283 [2021-06-12 20:03:58,866 INFO L226 Difference]: Without dead ends: 1244 [2021-06-12 20:03:58,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-12 20:03:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1193. [2021-06-12 20:03:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2323825503355703) internal successors, (3853), 1192 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3853 transitions. [2021-06-12 20:03:58,878 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3853 transitions. Word has length 24 [2021-06-12 20:03:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:58,878 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3853 transitions. [2021-06-12 20:03:58,878 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 20:03:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3853 transitions. [2021-06-12 20:03:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:58,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:58,880 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:59,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3173,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:59,080 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1251797136, now seen corresponding path program 393 times [2021-06-12 20:03:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:59,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937270770] [2021-06-12 20:03:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:59,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:59,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937270770] [2021-06-12 20:03:59,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937270770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342952881] [2021-06-12 20:03:59,238 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 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 20:03:59,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:03:59,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:59,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:03:59,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,319 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 19 treesize of output 15 [2021-06-12 20:03:59,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,322 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 20:03:59,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,352 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 20:03:59,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:03:59,425 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:03:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,429 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 20:03:59,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,433 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 19 treesize of output 15 [2021-06-12 20:03:59,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:59,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:03:59,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,502 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 13 treesize of output 9 [2021-06-12 20:03:59,503 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,507 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 12 treesize of output 8 [2021-06-12 20:03:59,508 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:59,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,511 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 13 treesize of output 9 [2021-06-12 20:03:59,512 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,515 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 11 treesize of output 7 [2021-06-12 20:03:59,516 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:03:59,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:59,572 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 20:03:59,572 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-12 20:03:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:03:59,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342952881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:59,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:03:59,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544185959] [2021-06-12 20:03:59,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:59,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:59,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:59,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:59,667 INFO L87 Difference]: Start difference. First operand 1193 states and 3853 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 20:03:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:59,976 INFO L93 Difference]: Finished difference Result 1365 states and 4309 transitions. [2021-06-12 20:03:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:59,976 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 24 [2021-06-12 20:03:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:59,978 INFO L225 Difference]: With dead ends: 1365 [2021-06-12 20:03:59,978 INFO L226 Difference]: Without dead ends: 1318 [2021-06-12 20:03:59,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-12 20:03:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-06-12 20:03:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.2406015037593985) internal successors, (3879), 1197 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3879 transitions. [2021-06-12 20:03:59,990 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3879 transitions. Word has length 24 [2021-06-12 20:03:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:59,990 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3879 transitions. [2021-06-12 20:03:59,990 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 20:03:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3879 transitions. [2021-06-12 20:03:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:03:59,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:59,991 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:00,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:00,191 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash 371523600, now seen corresponding path program 394 times [2021-06-12 20:04:00,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:00,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251914705] [2021-06-12 20:04:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:00,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:00,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251914705] [2021-06-12 20:04:00,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251914705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:00,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638359444] [2021-06-12 20:04:00,310 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 20:04:00,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:00,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:00,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,392 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 20:04:00,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,396 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 19 treesize of output 15 [2021-06-12 20:04:00,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,400 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 19 treesize of output 15 [2021-06-12 20:04:00,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,403 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 19 treesize of output 15 [2021-06-12 20:04:00,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:00,464 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-12 20:04:00,590 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-12 20:04:00,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,595 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 20 treesize of output 16 [2021-06-12 20:04:00,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:00,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,604 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 19 treesize of output 15 [2021-06-12 20:04:00,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,609 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 20:04:00,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,621 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 20 treesize of output 16 [2021-06-12 20:04:00,622 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,626 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 20 treesize of output 16 [2021-06-12 20:04:00,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,630 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 19 treesize of output 15 [2021-06-12 20:04:00,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:00,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:00,806 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-12 20:04:00,806 INFO L628 ElimStorePlain]: treesize reduction 168, result has 53.2 percent of original size [2021-06-12 20:04:00,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,810 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 13 treesize of output 9 [2021-06-12 20:04:00,811 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,815 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 7 [2021-06-12 20:04:00,816 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:00,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:00,819 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 11 treesize of output 7 [2021-06-12 20:04:00,820 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:00,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:00,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:04:00,894 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-12 20:04:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638359444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913152416] [2021-06-12 20:04:01,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:01,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:01,020 INFO L87 Difference]: Start difference. First operand 1198 states and 3879 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 20:04:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:01,405 INFO L93 Difference]: Finished difference Result 1560 states and 4816 transitions. [2021-06-12 20:04:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:04:01,405 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 24 [2021-06-12 20:04:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:01,407 INFO L225 Difference]: With dead ends: 1560 [2021-06-12 20:04:01,407 INFO L226 Difference]: Without dead ends: 1442 [2021-06-12 20:04:01,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-12 20:04:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1191. [2021-06-12 20:04:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.2336134453781513) internal successors, (3848), 1190 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3848 transitions. [2021-06-12 20:04:01,420 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3848 transitions. Word has length 24 [2021-06-12 20:04:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:01,420 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3848 transitions. [2021-06-12 20:04:01,420 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 20:04:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3848 transitions. [2021-06-12 20:04:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:01,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:01,421 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:01,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3189,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,622 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash -854186654, now seen corresponding path program 395 times [2021-06-12 20:04:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:01,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112536528] [2021-06-12 20:04:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:01,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112536528] [2021-06-12 20:04:01,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112536528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805325487] [2021-06-12 20:04:01,765 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 20:04:01,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:01,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:01,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,868 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 20:04:01,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,871 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 20:04:01,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:01,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,924 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 18 treesize of output 14 [2021-06-12 20:04:01,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,927 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 18 treesize of output 14 [2021-06-12 20:04:01,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:01,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:01,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:02,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,153 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 20:04:02,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:02,163 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:02,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:02,171 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 20:04:02,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:11 [2021-06-12 20:04:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805325487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:02,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:02,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530050515] [2021-06-12 20:04:02,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:02,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:02,205 INFO L87 Difference]: Start difference. First operand 1191 states and 3848 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:02,574 INFO L93 Difference]: Finished difference Result 1311 states and 4160 transitions. [2021-06-12 20:04:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:02,576 INFO L225 Difference]: With dead ends: 1311 [2021-06-12 20:04:02,576 INFO L226 Difference]: Without dead ends: 1280 [2021-06-12 20:04:02,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:04:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-12 20:04:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1211. [2021-06-12 20:04:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.2330578512396695) internal successors, (3912), 1210 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3912 transitions. [2021-06-12 20:04:02,588 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3912 transitions. Word has length 24 [2021-06-12 20:04:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:02,588 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 3912 transitions. [2021-06-12 20:04:02,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3912 transitions. [2021-06-12 20:04:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:02,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:02,589 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:02,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3195 [2021-06-12 20:04:02,790 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1702808826, now seen corresponding path program 396 times [2021-06-12 20:04:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:02,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283619925] [2021-06-12 20:04:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:02,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283619925] [2021-06-12 20:04:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283619925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742493721] [2021-06-12 20:04:02,936 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 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 20:04:02,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:02,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:02,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:03,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:03,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,057 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 17 treesize of output 13 [2021-06-12 20:04:03,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:03,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 20:04:03,183 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:04:03,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,186 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 20 treesize of output 16 [2021-06-12 20:04:03,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,195 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 20:04:03,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,198 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 20:04:03,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:03,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:03,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:04:03,252 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,255 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 12 treesize of output 8 [2021-06-12 20:04:03,256 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,259 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 13 treesize of output 9 [2021-06-12 20:04:03,261 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:03,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:03,263 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 12 treesize of output 8 [2021-06-12 20:04:03,264 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:03,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:03,306 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 20:04:03,306 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:169, output treesize:57 [2021-06-12 20:04:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:03,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742493721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:03,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:03,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:03,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534602738] [2021-06-12 20:04:03,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:03,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:03,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:03,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:03,389 INFO L87 Difference]: Start difference. First operand 1211 states and 3912 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 20:04:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:03,974 INFO L93 Difference]: Finished difference Result 1454 states and 4530 transitions. [2021-06-12 20:04:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:03,974 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 24 [2021-06-12 20:04:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:03,976 INFO L225 Difference]: With dead ends: 1454 [2021-06-12 20:04:03,976 INFO L226 Difference]: Without dead ends: 1366 [2021-06-12 20:04:03,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-12 20:04:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1203. [2021-06-12 20:04:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 3.237936772046589) internal successors, (3892), 1202 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3892 transitions. [2021-06-12 20:04:03,994 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3892 transitions. Word has length 24 [2021-06-12 20:04:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:03,994 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3892 transitions. [2021-06-12 20:04:03,994 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 20:04:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3892 transitions. [2021-06-12 20:04:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:03,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:03,996 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:04,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3201 [2021-06-12 20:04:04,196 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1922104802, now seen corresponding path program 397 times [2021-06-12 20:04:04,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:04,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722983346] [2021-06-12 20:04:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:04,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:04,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722983346] [2021-06-12 20:04:04,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722983346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474034096] [2021-06-12 20:04:04,342 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 20:04:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,446 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 17 treesize of output 13 [2021-06-12 20:04:04,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:04,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,510 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 18 treesize of output 14 [2021-06-12 20:04:04,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,514 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 18 treesize of output 14 [2021-06-12 20:04:04,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:04,569 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,752 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 27 treesize of output 21 [2021-06-12 20:04:04,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,755 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 27 treesize of output 21 [2021-06-12 20:04:04,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:04,782 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-12 20:04:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:04,784 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 11 treesize of output 7 [2021-06-12 20:04:04,785 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:04,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:04,793 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 20:04:04,793 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:97, output treesize:12 [2021-06-12 20:04:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474034096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:04,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614020416] [2021-06-12 20:04:04,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:04,835 INFO L87 Difference]: Start difference. First operand 1203 states and 3892 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:05,259 INFO L93 Difference]: Finished difference Result 1437 states and 4493 transitions. [2021-06-12 20:04:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:05,261 INFO L225 Difference]: With dead ends: 1437 [2021-06-12 20:04:05,261 INFO L226 Difference]: Without dead ends: 1355 [2021-06-12 20:04:05,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-12 20:04:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1214. [2021-06-12 20:04:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.239076669414674) internal successors, (3929), 1213 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3929 transitions. [2021-06-12 20:04:05,273 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3929 transitions. Word has length 24 [2021-06-12 20:04:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:05,273 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 3929 transitions. [2021-06-12 20:04:05,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3929 transitions. [2021-06-12 20:04:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:05,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:05,275 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:05,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:05,485 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash -111531678, now seen corresponding path program 398 times [2021-06-12 20:04:05,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:05,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541301565] [2021-06-12 20:04:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:05,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:05,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541301565] [2021-06-12 20:04:05,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541301565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:05,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844696848] [2021-06-12 20:04:05,668 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 20:04:05,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:05,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,768 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 18 treesize of output 14 [2021-06-12 20:04:05,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,788 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 17 treesize of output 13 [2021-06-12 20:04:05,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:05,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:05,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 20:04:05,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,897 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 19 treesize of output 15 [2021-06-12 20:04:05,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,900 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 20:04:05,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:05,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,929 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 11 treesize of output 7 [2021-06-12 20:04:05,930 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:05,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,933 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 7 [2021-06-12 20:04:05,934 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:05,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:05,957 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 20:04:05,957 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-12 20:04:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:06,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844696848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:06,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:06,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070500354] [2021-06-12 20:04:06,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:06,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:06,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:06,031 INFO L87 Difference]: Start difference. First operand 1214 states and 3929 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:06,609 INFO L93 Difference]: Finished difference Result 1471 states and 4610 transitions. [2021-06-12 20:04:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:06,611 INFO L225 Difference]: With dead ends: 1471 [2021-06-12 20:04:06,611 INFO L226 Difference]: Without dead ends: 1413 [2021-06-12 20:04:06,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:04:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-12 20:04:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1209. [2021-06-12 20:04:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.2417218543046356) internal successors, (3916), 1208 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3916 transitions. [2021-06-12 20:04:06,623 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3916 transitions. Word has length 24 [2021-06-12 20:04:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3916 transitions. [2021-06-12 20:04:06,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3916 transitions. [2021-06-12 20:04:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:06,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:06,625 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:06,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3217 [2021-06-12 20:04:06,825 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash -285423848, now seen corresponding path program 399 times [2021-06-12 20:04:06,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:06,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959560875] [2021-06-12 20:04:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:06,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:06,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959560875] [2021-06-12 20:04:06,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959560875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942149437] [2021-06-12 20:04:06,975 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 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 20:04:07,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:07,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,074 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 17 treesize of output 13 [2021-06-12 20:04:07,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:07,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:07,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 20:04:07,164 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:04:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,168 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 19 treesize of output 15 [2021-06-12 20:04:07,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,171 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 20:04:07,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,175 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 20 treesize of output 16 [2021-06-12 20:04:07,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,178 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 20 treesize of output 16 [2021-06-12 20:04:07,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:07,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,234 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 13 treesize of output 9 [2021-06-12 20:04:07,235 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,238 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 13 treesize of output 9 [2021-06-12 20:04:07,240 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,243 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 12 treesize of output 8 [2021-06-12 20:04:07,244 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:07,247 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 12 treesize of output 8 [2021-06-12 20:04:07,248 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:07,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:07,295 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 20:04:07,295 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:69 [2021-06-12 20:04:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:07,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942149437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:07,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:07,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:07,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221409966] [2021-06-12 20:04:07,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:07,436 INFO L87 Difference]: Start difference. First operand 1209 states and 3916 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 20:04:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:08,188 INFO L93 Difference]: Finished difference Result 1570 states and 4898 transitions. [2021-06-12 20:04:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:08,188 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 24 [2021-06-12 20:04:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:08,190 INFO L225 Difference]: With dead ends: 1570 [2021-06-12 20:04:08,190 INFO L226 Difference]: Without dead ends: 1482 [2021-06-12 20:04:08,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:04:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-12 20:04:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1217. [2021-06-12 20:04:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 3.254934210526316) internal successors, (3958), 1216 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3958 transitions. [2021-06-12 20:04:08,204 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3958 transitions. Word has length 24 [2021-06-12 20:04:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:08,204 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3958 transitions. [2021-06-12 20:04:08,204 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 20:04:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3958 transitions. [2021-06-12 20:04:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:08,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:08,205 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:08,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3225,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:08,406 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1263045456, now seen corresponding path program 400 times [2021-06-12 20:04:08,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:08,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75595643] [2021-06-12 20:04:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:08,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:08,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75595643] [2021-06-12 20:04:08,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75595643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754094436] [2021-06-12 20:04:08,526 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 20:04:08,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:08,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:08,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:08,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,637 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 17 treesize of output 13 [2021-06-12 20:04:08,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:08,659 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 20:04:08,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 20:04:08,752 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:04:08,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,756 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 20:04:08,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,759 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 20:04:08,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:08,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,785 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 12 treesize of output 8 [2021-06-12 20:04:08,786 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:08,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,788 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 12 treesize of output 8 [2021-06-12 20:04:08,790 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:08,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:08,811 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 20:04:08,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-06-12 20:04:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754094436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:08,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:08,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747943253] [2021-06-12 20:04:08,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:08,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:08,884 INFO L87 Difference]: Start difference. First operand 1217 states and 3958 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:09,222 INFO L93 Difference]: Finished difference Result 1423 states and 4510 transitions. [2021-06-12 20:04:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:04:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:09,223 INFO L225 Difference]: With dead ends: 1423 [2021-06-12 20:04:09,224 INFO L226 Difference]: Without dead ends: 1358 [2021-06-12 20:04:09,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-06-12 20:04:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1215. [2021-06-12 20:04:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-12 20:04:09,236 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-12 20:04:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:09,236 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-12 20:04:09,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-12 20:04:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:09,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:09,237 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:09,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:09,438 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:09,438 INFO L82 PathProgramCache]: Analyzing trace with hash 217930746, now seen corresponding path program 401 times [2021-06-12 20:04:09,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:09,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676136815] [2021-06-12 20:04:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:09,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:09,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676136815] [2021-06-12 20:04:09,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676136815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15803834] [2021-06-12 20:04:09,590 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 20:04:09,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:09,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:09,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:09,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:09,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,693 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 1 xjuncts. [2021-06-12 20:04:09,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:04:09,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,717 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 19 treesize of output 15 [2021-06-12 20:04:09,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,720 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 19 treesize of output 15 [2021-06-12 20:04:09,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:09,746 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:09,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:09,749 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:09,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:09,769 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 20:04:09,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:04:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15803834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859417804] [2021-06-12 20:04:09,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:09,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:09,831 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:10,140 INFO L93 Difference]: Finished difference Result 1385 states and 4446 transitions. [2021-06-12 20:04:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:04:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:10,142 INFO L225 Difference]: With dead ends: 1385 [2021-06-12 20:04:10,142 INFO L226 Difference]: Without dead ends: 1339 [2021-06-12 20:04:10,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-12 20:04:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1215. [2021-06-12 20:04:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-12 20:04:10,154 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-12 20:04:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:10,154 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-12 20:04:10,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-12 20:04:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:10,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:10,155 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:10,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:10,357 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 849135248, now seen corresponding path program 402 times [2021-06-12 20:04:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:10,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65372212] [2021-06-12 20:04:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:10,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:10,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65372212] [2021-06-12 20:04:10,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65372212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:10,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108167354] [2021-06-12 20:04:10,554 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 20:04:10,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:10,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:10,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:10,634 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 17 treesize of output 13 [2021-06-12 20:04:10,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,637 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 18 treesize of output 14 [2021-06-12 20:04:10,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,640 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 20:04:10,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,642 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 18 treesize of output 14 [2021-06-12 20:04:10,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:10,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:10,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,777 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 20 treesize of output 16 [2021-06-12 20:04:10,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,828 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 20:04:10,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,884 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 12 treesize of output 8 [2021-06-12 20:04:10,885 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:10,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,940 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 20:04:10,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:10,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:10,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:10,990 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 11 treesize of output 7 [2021-06-12 20:04:10,991 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:11,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:11,038 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,079 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 12 treesize of output 8 [2021-06-12 20:04:11,080 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:11,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:04:11,122 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:11,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:11,161 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 20:04:11,161 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:04:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:11,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108167354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:11,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:11,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:11,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405344089] [2021-06-12 20:04:11,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:11,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:11,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:11,297 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:11,812 INFO L93 Difference]: Finished difference Result 1649 states and 5135 transitions. [2021-06-12 20:04:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:11,814 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 20:04:11,814 INFO L226 Difference]: Without dead ends: 1556 [2021-06-12 20:04:11,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-06-12 20:04:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1226. [2021-06-12 20:04:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.2522448979591836) internal successors, (3984), 1225 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3984 transitions. [2021-06-12 20:04:11,828 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3984 transitions. Word has length 24 [2021-06-12 20:04:11,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:11,828 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3984 transitions. [2021-06-12 20:04:11,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3984 transitions. [2021-06-12 20:04:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:11,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:11,829 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:12,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3247,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:12,029 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1623339618, now seen corresponding path program 403 times [2021-06-12 20:04:12,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:12,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646576406] [2021-06-12 20:04:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:12,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646576406] [2021-06-12 20:04:12,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646576406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109973840] [2021-06-12 20:04:12,216 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 20:04:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:12,296 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 18 treesize of output 14 [2021-06-12 20:04:12,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,299 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 18 treesize of output 14 [2021-06-12 20:04:12,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:12,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,304 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 20:04:12,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:12,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:12,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,464 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 20:04:12,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,467 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 20:04:12,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,534 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-06-12 20:04:12,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:12,538 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:12,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,562 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 19 treesize of output 15 [2021-06-12 20:04:12,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,586 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 11 treesize of output 7 [2021-06-12 20:04:12,587 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:12,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:12,608 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 20:04:12,608 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-06-12 20:04:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:12,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109973840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:12,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060009578] [2021-06-12 20:04:12,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:12,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:12,681 INFO L87 Difference]: Start difference. First operand 1226 states and 3984 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:13,176 INFO L93 Difference]: Finished difference Result 1669 states and 5176 transitions. [2021-06-12 20:04:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:13,178 INFO L225 Difference]: With dead ends: 1669 [2021-06-12 20:04:13,178 INFO L226 Difference]: Without dead ends: 1535 [2021-06-12 20:04:13,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-12 20:04:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1215. [2021-06-12 20:04:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-12 20:04:13,191 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-12 20:04:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:13,191 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-12 20:04:13,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-12 20:04:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:13,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:13,192 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3257,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,392 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash -263246086, now seen corresponding path program 404 times [2021-06-12 20:04:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411744286] [2021-06-12 20:04:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:13,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411744286] [2021-06-12 20:04:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411744286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003627278] [2021-06-12 20:04:13,582 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 20:04:13,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:13,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:13,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,681 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 20:04:13,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,710 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 20:04:13,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:13,736 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 20:04:13,859 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:13,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:13,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,867 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 20:04:13,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,870 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 20 treesize of output 16 [2021-06-12 20:04:13,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,874 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 20:04:13,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:13,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:04:13,933 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:13,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,936 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 11 treesize of output 7 [2021-06-12 20:04:13,937 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:13,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,940 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 12 treesize of output 8 [2021-06-12 20:04:13,942 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:13,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:13,944 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 13 treesize of output 9 [2021-06-12 20:04:13,945 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:13,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:13,998 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 20:04:13,998 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:69 [2021-06-12 20:04:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003627278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:14,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999637426] [2021-06-12 20:04:14,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:14,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:14,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:14,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:14,098 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:14,553 INFO L93 Difference]: Finished difference Result 1378 states and 4380 transitions. [2021-06-12 20:04:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:04:14,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:14,555 INFO L225 Difference]: With dead ends: 1378 [2021-06-12 20:04:14,555 INFO L226 Difference]: Without dead ends: 1308 [2021-06-12 20:04:14,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 498.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-12 20:04:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1221. [2021-06-12 20:04:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.2426229508196722) internal successors, (3956), 1220 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3956 transitions. [2021-06-12 20:04:14,567 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3956 transitions. Word has length 24 [2021-06-12 20:04:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:14,568 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3956 transitions. [2021-06-12 20:04:14,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3956 transitions. [2021-06-12 20:04:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:14,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:14,569 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:14,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-06-12 20:04:14,769 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2063390744, now seen corresponding path program 405 times [2021-06-12 20:04:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:14,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920221570] [2021-06-12 20:04:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:14,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920221570] [2021-06-12 20:04:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920221570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678001356] [2021-06-12 20:04:14,972 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 20:04:14,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:14,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:15,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,079 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 19 treesize of output 15 [2021-06-12 20:04:15,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:15,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:15,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 20:04:15,195 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:15,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,199 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 20 treesize of output 16 [2021-06-12 20:04:15,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,203 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 19 treesize of output 15 [2021-06-12 20:04:15,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:15,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,211 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 19 treesize of output 15 [2021-06-12 20:04:15,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,276 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 13 treesize of output 9 [2021-06-12 20:04:15,278 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:04:15,282 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:15,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,285 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 12 treesize of output 8 [2021-06-12 20:04:15,286 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:15,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,289 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 12 treesize of output 8 [2021-06-12 20:04:15,290 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:15,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:15,349 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 20:04:15,349 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-12 20:04:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:15,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678001356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:15,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472508713] [2021-06-12 20:04:15,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:15,491 INFO L87 Difference]: Start difference. First operand 1221 states and 3956 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,839 INFO L93 Difference]: Finished difference Result 1390 states and 4408 transitions. [2021-06-12 20:04:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,841 INFO L225 Difference]: With dead ends: 1390 [2021-06-12 20:04:15,841 INFO L226 Difference]: Without dead ends: 1324 [2021-06-12 20:04:15,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-12 20:04:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1218. [2021-06-12 20:04:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2423993426458506) internal successors, (3946), 1217 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3946 transitions. [2021-06-12 20:04:15,853 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3946 transitions. Word has length 24 [2021-06-12 20:04:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,854 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3946 transitions. [2021-06-12 20:04:15,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3946 transitions. [2021-06-12 20:04:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:15,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,855 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:16,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:16,055 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash 37541640, now seen corresponding path program 406 times [2021-06-12 20:04:16,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:16,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720381931] [2021-06-12 20:04:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:16,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720381931] [2021-06-12 20:04:16,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720381931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813970113] [2021-06-12 20:04:16,262 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 20:04:16,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:16,347 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 17 treesize of output 13 [2021-06-12 20:04:16,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,350 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 20:04:16,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,352 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 18 treesize of output 14 [2021-06-12 20:04:16,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,355 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 18 treesize of output 14 [2021-06-12 20:04:16,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:16,398 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:16,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,493 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 20 treesize of output 16 [2021-06-12 20:04:16,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,545 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 8 [2021-06-12 20:04:16,546 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:16,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:16,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,646 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 20 treesize of output 16 [2021-06-12 20:04:16,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,701 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 7 [2021-06-12 20:04:16,702 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:16,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,747 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 20:04:16,748 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,790 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 12 treesize of output 8 [2021-06-12 20:04:16,791 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:16,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,833 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 11 treesize of output 7 [2021-06-12 20:04:16,834 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:16,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:16,873 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 20:04:16,873 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:04:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:17,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813970113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:17,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:17,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380452940] [2021-06-12 20:04:17,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:17,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:17,009 INFO L87 Difference]: Start difference. First operand 1218 states and 3946 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:17,536 INFO L93 Difference]: Finished difference Result 1563 states and 4893 transitions. [2021-06-12 20:04:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:04:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:17,538 INFO L225 Difference]: With dead ends: 1563 [2021-06-12 20:04:17,538 INFO L226 Difference]: Without dead ends: 1470 [2021-06-12 20:04:17,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-12 20:04:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1229. [2021-06-12 20:04:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 3.251628664495114) internal successors, (3993), 1228 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3993 transitions. [2021-06-12 20:04:17,552 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3993 transitions. Word has length 24 [2021-06-12 20:04:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:17,552 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 3993 transitions. [2021-06-12 20:04:17,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3993 transitions. [2021-06-12 20:04:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:17,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:17,553 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:17,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:17,754 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:17,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:17,754 INFO L82 PathProgramCache]: Analyzing trace with hash 811746010, now seen corresponding path program 407 times [2021-06-12 20:04:17,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:17,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134802284] [2021-06-12 20:04:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:18,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134802284] [2021-06-12 20:04:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134802284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774222237] [2021-06-12 20:04:18,003 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 20:04:18,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:18,106 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 18 treesize of output 14 [2021-06-12 20:04:18,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,109 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 17 treesize of output 13 [2021-06-12 20:04:18,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,129 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 20:04:18,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 20:04:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:18,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,191 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 20:04:18,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,217 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 11 treesize of output 7 [2021-06-12 20:04:18,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,220 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 7 [2021-06-12 20:04:18,222 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:18,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:18,242 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 20:04:18,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:04:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:18,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774222237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:18,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:18,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:18,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454664701] [2021-06-12 20:04:18,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:18,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:18,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:18,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:18,317 INFO L87 Difference]: Start difference. First operand 1229 states and 3993 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:18,804 INFO L93 Difference]: Finished difference Result 1409 states and 4524 transitions. [2021-06-12 20:04:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:04:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:18,806 INFO L225 Difference]: With dead ends: 1409 [2021-06-12 20:04:18,806 INFO L226 Difference]: Without dead ends: 1363 [2021-06-12 20:04:18,806 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-06-12 20:04:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1215. [2021-06-12 20:04:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-12 20:04:18,819 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-12 20:04:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:18,819 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-12 20:04:18,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-12 20:04:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:18,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:18,820 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:19,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3297,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:19,021 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1922390028, now seen corresponding path program 408 times [2021-06-12 20:04:19,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:19,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838774060] [2021-06-12 20:04:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:19,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:19,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838774060] [2021-06-12 20:04:19,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838774060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973314304] [2021-06-12 20:04:19,209 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 20:04:19,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,334 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 17 treesize of output 13 [2021-06-12 20:04:19,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,355 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 18 treesize of output 14 [2021-06-12 20:04:19,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:19,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 20:04:19,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,523 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 20:04:19,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,526 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 19 treesize of output 15 [2021-06-12 20:04:19,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:19,554 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:19,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,557 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 11 treesize of output 7 [2021-06-12 20:04:19,558 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:19,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:19,579 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 20:04:19,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:81, output treesize:25 [2021-06-12 20:04:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:19,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973314304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:19,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:19,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924653428] [2021-06-12 20:04:19,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:19,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:19,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:19,623 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:20,478 INFO L93 Difference]: Finished difference Result 1501 states and 4733 transitions. [2021-06-12 20:04:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:04:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:20,480 INFO L225 Difference]: With dead ends: 1501 [2021-06-12 20:04:20,481 INFO L226 Difference]: Without dead ends: 1415 [2021-06-12 20:04:20,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:04:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-12 20:04:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1228. [2021-06-12 20:04:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.243683781581092) internal successors, (3980), 1227 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3980 transitions. [2021-06-12 20:04:20,494 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3980 transitions. Word has length 24 [2021-06-12 20:04:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:20,494 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3980 transitions. [2021-06-12 20:04:20,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3980 transitions. [2021-06-12 20:04:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:20,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:20,495 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:20,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:20,696 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash 634605452, now seen corresponding path program 409 times [2021-06-12 20:04:20,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:20,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893120825] [2021-06-12 20:04:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:20,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893120825] [2021-06-12 20:04:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893120825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98732207] [2021-06-12 20:04:20,849 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 20:04:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:20,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:20,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:20,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:20,969 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 18 treesize of output 14 [2021-06-12 20:04:20,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:20,972 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 18 treesize of output 14 [2021-06-12 20:04:20,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,024 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 17 treesize of output 13 [2021-06-12 20:04:21,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,027 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 17 treesize of output 13 [2021-06-12 20:04:21,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:21,076 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:21,225 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-12 20:04:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,228 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 19 treesize of output 15 [2021-06-12 20:04:21,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,231 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 20 treesize of output 16 [2021-06-12 20:04:21,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,255 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 12 treesize of output 8 [2021-06-12 20:04:21,256 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:21,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,259 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 13 treesize of output 9 [2021-06-12 20:04:21,260 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:21,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:21,279 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 20:04:21,279 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:27 [2021-06-12 20:04:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:21,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98732207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:21,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:21,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:04:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415489173] [2021-06-12 20:04:21,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:04:21,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:04:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:04:21,328 INFO L87 Difference]: Start difference. First operand 1228 states and 3980 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 20:04:21,550 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:04:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:21,900 INFO L93 Difference]: Finished difference Result 1494 states and 4682 transitions. [2021-06-12 20:04:21,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:04:21,901 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 24 [2021-06-12 20:04:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:21,902 INFO L225 Difference]: With dead ends: 1494 [2021-06-12 20:04:21,902 INFO L226 Difference]: Without dead ends: 1447 [2021-06-12 20:04:21,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-06-12 20:04:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1222. [2021-06-12 20:04:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.2473382473382473) internal successors, (3965), 1221 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3965 transitions. [2021-06-12 20:04:21,916 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3965 transitions. Word has length 24 [2021-06-12 20:04:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:21,916 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 3965 transitions. [2021-06-12 20:04:21,916 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 20:04:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3965 transitions. [2021-06-12 20:04:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:21,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:21,917 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:22,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3315,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:22,117 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:22,118 INFO L82 PathProgramCache]: Analyzing trace with hash 853901428, now seen corresponding path program 410 times [2021-06-12 20:04:22,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:22,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556763196] [2021-06-12 20:04:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:22,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:22,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556763196] [2021-06-12 20:04:22,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556763196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604225424] [2021-06-12 20:04:22,261 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 20:04:22,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:22,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:22,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,379 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 20:04:22,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,383 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 20:04:22,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,435 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 18 treesize of output 14 [2021-06-12 20:04:22,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,438 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 18 treesize of output 14 [2021-06-12 20:04:22,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:22,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:22,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,670 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 27 treesize of output 21 [2021-06-12 20:04:22,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,680 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 22 treesize of output 14 [2021-06-12 20:04:22,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:22,688 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 20:04:22,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:11 [2021-06-12 20:04:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:22,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604225424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:22,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:22,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796353962] [2021-06-12 20:04:22,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:22,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:22,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:22,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:22,722 INFO L87 Difference]: Start difference. First operand 1222 states and 3965 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:22,960 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:04:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:23,468 INFO L93 Difference]: Finished difference Result 1531 states and 4821 transitions. [2021-06-12 20:04:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:23,470 INFO L225 Difference]: With dead ends: 1531 [2021-06-12 20:04:23,470 INFO L226 Difference]: Without dead ends: 1493 [2021-06-12 20:04:23,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:04:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-12 20:04:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1226. [2021-06-12 20:04:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.249795918367347) internal successors, (3981), 1225 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3981 transitions. [2021-06-12 20:04:23,484 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3981 transitions. Word has length 24 [2021-06-12 20:04:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:23,484 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3981 transitions. [2021-06-12 20:04:23,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3981 transitions. [2021-06-12 20:04:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:23,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:23,485 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:23,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:23,685 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:23,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1179735052, now seen corresponding path program 411 times [2021-06-12 20:04:23,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:23,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615985779] [2021-06-12 20:04:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:23,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:23,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615985779] [2021-06-12 20:04:23,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615985779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:23,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715667869] [2021-06-12 20:04:23,814 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 20:04:23,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:23,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:23,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:23,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:23,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:23,963 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 17 treesize of output 13 [2021-06-12 20:04:23,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:23,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:23,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:23,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-12 20:04:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,066 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 20:04:24,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,069 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 20:04:24,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,098 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 7 [2021-06-12 20:04:24,099 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:24,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,102 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 7 [2021-06-12 20:04:24,103 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:24,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:24,126 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 20:04:24,126 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-12 20:04:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715667869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:24,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:24,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988890218] [2021-06-12 20:04:24,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:24,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:24,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:24,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:24,198 INFO L87 Difference]: Start difference. First operand 1226 states and 3981 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 20:04:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:25,046 INFO L93 Difference]: Finished difference Result 1782 states and 5459 transitions. [2021-06-12 20:04:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:04:25,046 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 24 [2021-06-12 20:04:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:25,048 INFO L225 Difference]: With dead ends: 1782 [2021-06-12 20:04:25,048 INFO L226 Difference]: Without dead ends: 1613 [2021-06-12 20:04:25,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 795.7ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:04:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-06-12 20:04:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1243. [2021-06-12 20:04:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2657004830917873) internal successors, (4056), 1242 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4056 transitions. [2021-06-12 20:04:25,062 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4056 transitions. Word has length 24 [2021-06-12 20:04:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:25,062 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 4056 transitions. [2021-06-12 20:04:25,062 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 20:04:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4056 transitions. [2021-06-12 20:04:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:25,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:25,063 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:25,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-06-12 20:04:25,264 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1353627222, now seen corresponding path program 412 times [2021-06-12 20:04:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:25,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507337303] [2021-06-12 20:04:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:25,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507337303] [2021-06-12 20:04:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507337303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077991895] [2021-06-12 20:04:25,399 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 20:04:25,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,527 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 18 treesize of output 14 [2021-06-12 20:04:25,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,530 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 18 treesize of output 14 [2021-06-12 20:04:25,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,585 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 20:04:25,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:25,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:25,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:25,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:25,749 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 20:04:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,753 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 20 treesize of output 16 [2021-06-12 20:04:25,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,757 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 20 treesize of output 16 [2021-06-12 20:04:25,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:25,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,767 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 19 treesize of output 15 [2021-06-12 20:04:25,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:25,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:25,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:25,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,784 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 19 treesize of output 15 [2021-06-12 20:04:25,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,956 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-12 20:04:25,957 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-06-12 20:04:25,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,961 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 12 treesize of output 8 [2021-06-12 20:04:25,962 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,966 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 13 treesize of output 9 [2021-06-12 20:04:25,967 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:25,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,971 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 12 treesize of output 8 [2021-06-12 20:04:25,972 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:26,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:26,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:04:26,045 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-06-12 20:04:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:26,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077991895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:26,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:26,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:26,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950535305] [2021-06-12 20:04:26,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:26,190 INFO L87 Difference]: Start difference. First operand 1243 states and 4056 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 20:04:26,437 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:04:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:26,918 INFO L93 Difference]: Finished difference Result 1679 states and 5246 transitions. [2021-06-12 20:04:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:04:26,919 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 24 [2021-06-12 20:04:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:26,920 INFO L225 Difference]: With dead ends: 1679 [2021-06-12 20:04:26,920 INFO L226 Difference]: Without dead ends: 1591 [2021-06-12 20:04:26,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 770.7ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:04:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-06-12 20:04:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1248. [2021-06-12 20:04:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.27345629510826) internal successors, (4082), 1247 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4082 transitions. [2021-06-12 20:04:26,935 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4082 transitions. Word has length 24 [2021-06-12 20:04:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:26,935 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4082 transitions. [2021-06-12 20:04:26,935 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 20:04:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4082 transitions. [2021-06-12 20:04:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:26,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:26,936 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:27,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:27,137 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2061066538, now seen corresponding path program 413 times [2021-06-12 20:04:27,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:27,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923954563] [2021-06-12 20:04:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:27,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:27,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923954563] [2021-06-12 20:04:27,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923954563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:27,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059489241] [2021-06-12 20:04:27,325 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 20:04:27,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:04:27,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:27,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,474 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 20:04:27,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,477 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 17 treesize of output 13 [2021-06-12 20:04:27,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:27,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,532 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 18 treesize of output 14 [2021-06-12 20:04:27,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:27,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:27,682 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-12 20:04:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,686 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 20 treesize of output 16 [2021-06-12 20:04:27,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,690 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 20:04:27,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,695 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 20 treesize of output 16 [2021-06-12 20:04:27,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,699 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 20 treesize of output 16 [2021-06-12 20:04:27,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,704 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 19 treesize of output 15 [2021-06-12 20:04:27,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,708 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 20:04:27,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,713 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 20 treesize of output 16 [2021-06-12 20:04:27,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,717 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 19 treesize of output 15 [2021-06-12 20:04:27,717 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,879 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-12 20:04:27,880 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-06-12 20:04:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,883 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 13 treesize of output 9 [2021-06-12 20:04:27,884 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,888 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 12 treesize of output 8 [2021-06-12 20:04:27,889 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:04:27,893 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:27,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:27,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:04:27,959 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-06-12 20:04:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:04:28,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059489241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:28,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676115274] [2021-06-12 20:04:28,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:28,093 INFO L87 Difference]: Start difference. First operand 1248 states and 4082 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:28,355 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:04:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:29,036 INFO L93 Difference]: Finished difference Result 1997 states and 6116 transitions. [2021-06-12 20:04:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:04:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:29,043 INFO L225 Difference]: With dead ends: 1997 [2021-06-12 20:04:29,044 INFO L226 Difference]: Without dead ends: 1879 [2021-06-12 20:04:29,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 908.0ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:04:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-06-12 20:04:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1261. [2021-06-12 20:04:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.288095238095238) internal successors, (4143), 1260 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4143 transitions. [2021-06-12 20:04:29,059 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4143 transitions. Word has length 24 [2021-06-12 20:04:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:29,059 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4143 transitions. [2021-06-12 20:04:29,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4143 transitions. [2021-06-12 20:04:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:29,061 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:29,061 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:29,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:29,261 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1997490786, now seen corresponding path program 414 times [2021-06-12 20:04:29,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:29,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43091742] [2021-06-12 20:04:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:29,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43091742] [2021-06-12 20:04:29,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43091742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051035990] [2021-06-12 20:04:29,404 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 20:04:29,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:29,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:29,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,532 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 20:04:29,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,539 INFO 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 20:04:29,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-12 20:04:29,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,567 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 20:04:29,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:29,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:29,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,599 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 11 treesize of output 7 [2021-06-12 20:04:29,600 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:29,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:29,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:29,604 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:29,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:29,627 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 20:04:29,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-12 20:04:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:29,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051035990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:29,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:29,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52606857] [2021-06-12 20:04:29,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:29,698 INFO L87 Difference]: Start difference. First operand 1261 states and 4143 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:30,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:30,111 INFO L93 Difference]: Finished difference Result 1569 states and 5058 transitions. [2021-06-12 20:04:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:30,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:30,113 INFO L225 Difference]: With dead ends: 1569 [2021-06-12 20:04:30,113 INFO L226 Difference]: Without dead ends: 1528 [2021-06-12 20:04:30,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-12 20:04:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1268. [2021-06-12 20:04:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2865035516969217) internal successors, (4164), 1267 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4164 transitions. [2021-06-12 20:04:30,127 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4164 transitions. Word has length 24 [2021-06-12 20:04:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:30,127 INFO L482 AbstractCegarLoop]: Abstraction has 1268 states and 4164 transitions. [2021-06-12 20:04:30,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4164 transitions. [2021-06-12 20:04:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:30,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:30,128 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:30,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-06-12 20:04:30,329 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash -850272628, now seen corresponding path program 415 times [2021-06-12 20:04:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:30,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688699849] [2021-06-12 20:04:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:30,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:30,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688699849] [2021-06-12 20:04:30,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688699849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193500525] [2021-06-12 20:04:30,453 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 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 20:04:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:30,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:30,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,599 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 17 treesize of output 13 [2021-06-12 20:04:30,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:30,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,634 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 20:04:30,634 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-12 20:04:30,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,703 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 20:04:30,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,706 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 19 treesize of output 15 [2021-06-12 20:04:30,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,793 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-06-12 20:04:30,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,796 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 7 [2021-06-12 20:04:30,797 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:30,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,829 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 20:04:30,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,859 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 11 treesize of output 7 [2021-06-12 20:04:30,860 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:30,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:30,887 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 20:04:30,887 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-06-12 20:04:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:30,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193500525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:30,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:30,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665634033] [2021-06-12 20:04:30,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:30,949 INFO L87 Difference]: Start difference. First operand 1268 states and 4164 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 20:04:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:31,245 INFO L93 Difference]: Finished difference Result 1539 states and 4970 transitions. [2021-06-12 20:04:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:31,245 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 24 [2021-06-12 20:04:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:31,247 INFO L225 Difference]: With dead ends: 1539 [2021-06-12 20:04:31,247 INFO L226 Difference]: Without dead ends: 1479 [2021-06-12 20:04:31,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-06-12 20:04:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1261. [2021-06-12 20:04:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.288095238095238) internal successors, (4143), 1260 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4143 transitions. [2021-06-12 20:04:31,260 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4143 transitions. Word has length 24 [2021-06-12 20:04:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:31,260 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4143 transitions. [2021-06-12 20:04:31,260 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 20:04:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4143 transitions. [2021-06-12 20:04:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:31,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:31,261 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:31,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:31,462 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash -219068126, now seen corresponding path program 416 times [2021-06-12 20:04:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:31,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753766221] [2021-06-12 20:04:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:31,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753766221] [2021-06-12 20:04:31,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753766221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50725489] [2021-06-12 20:04:31,654 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 20:04:31,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:31,748 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 18 treesize of output 14 [2021-06-12 20:04:31,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,750 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 18 treesize of output 14 [2021-06-12 20:04:31,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,753 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 20:04:31,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,756 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 17 treesize of output 13 [2021-06-12 20:04:31,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:31,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:31,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,890 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 20 treesize of output 16 [2021-06-12 20:04:31,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:31,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,942 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 20 treesize of output 16 [2021-06-12 20:04:31,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,991 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 12 treesize of output 8 [2021-06-12 20:04:31,992 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:32,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,040 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 12 treesize of output 8 [2021-06-12 20:04:32,041 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:32,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,087 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 20:04:32,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,132 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 12 treesize of output 8 [2021-06-12 20:04:32,134 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:32,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,177 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 20:04:32,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,219 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 12 treesize of output 8 [2021-06-12 20:04:32,221 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:32,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:32,259 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 20:04:32,259 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:04:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50725489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:32,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:32,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928468132] [2021-06-12 20:04:32,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:32,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:32,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:32,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:32,403 INFO L87 Difference]: Start difference. First operand 1261 states and 4143 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:32,950 INFO L93 Difference]: Finished difference Result 1777 states and 5595 transitions. [2021-06-12 20:04:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:32,952 INFO L225 Difference]: With dead ends: 1777 [2021-06-12 20:04:32,953 INFO L226 Difference]: Without dead ends: 1684 [2021-06-12 20:04:32,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 641.8ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:04:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-12 20:04:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1272. [2021-06-12 20:04:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.296616837136113) internal successors, (4190), 1271 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4190 transitions. [2021-06-12 20:04:32,967 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4190 transitions. Word has length 24 [2021-06-12 20:04:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:32,967 INFO L482 AbstractCegarLoop]: Abstraction has 1272 states and 4190 transitions. [2021-06-12 20:04:32,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4190 transitions. [2021-06-12 20:04:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:32,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:32,968 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:33,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-06-12 20:04:33,169 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash 555136244, now seen corresponding path program 417 times [2021-06-12 20:04:33,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:33,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397853361] [2021-06-12 20:04:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:33,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:33,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397853361] [2021-06-12 20:04:33,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397853361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975023627] [2021-06-12 20:04:33,323 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 20:04:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:33,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:33,426 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 20:04:33,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,429 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 20:04:33,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:04:33,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:04:33,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:33,477 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:33,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:33,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,621 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 7 [2021-06-12 20:04:33,622 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:33,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,644 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 19 treesize of output 15 [2021-06-12 20:04:33,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,665 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 12 treesize of output 8 [2021-06-12 20:04:33,666 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:33,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:33,684 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 20:04:33,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:04:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:33,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975023627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:33,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:33,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783229311] [2021-06-12 20:04:33,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:33,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:33,767 INFO L87 Difference]: Start difference. First operand 1272 states and 4190 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:34,118 INFO L93 Difference]: Finished difference Result 1774 states and 5620 transitions. [2021-06-12 20:04:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:34,121 INFO L225 Difference]: With dead ends: 1774 [2021-06-12 20:04:34,121 INFO L226 Difference]: Without dead ends: 1685 [2021-06-12 20:04:34,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:04:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-06-12 20:04:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1275. [2021-06-12 20:04:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.3006279434850865) internal successors, (4205), 1274 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4205 transitions. [2021-06-12 20:04:34,135 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4205 transitions. Word has length 24 [2021-06-12 20:04:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:34,135 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4205 transitions. [2021-06-12 20:04:34,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4205 transitions. [2021-06-12 20:04:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:34,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:34,137 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:34,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3373,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:34,337 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1270295952, now seen corresponding path program 418 times [2021-06-12 20:04:34,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:34,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446968256] [2021-06-12 20:04:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:34,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:34,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446968256] [2021-06-12 20:04:34,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446968256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:34,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397577633] [2021-06-12 20:04:34,487 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 20:04:34,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:34,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:34,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:34,583 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 24 treesize of output 18 [2021-06-12 20:04:34,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,586 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 24 treesize of output 18 [2021-06-12 20:04:34,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:34,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:34,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 20:04:34,643 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 28 treesize of output 22 [2021-06-12 20:04:34,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:34,661 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:34,662 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 28 treesize of output 22 [2021-06-12 20:04:34,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:34,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:34,679 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1467 vanished before elimination [2021-06-12 20:04:34,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:34,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 20:04:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:34,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397577633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:34,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:34,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:34,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763360326] [2021-06-12 20:04:34,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:34,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:34,775 INFO L87 Difference]: Start difference. First operand 1275 states and 4205 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 20:04:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:35,035 INFO L93 Difference]: Finished difference Result 1581 states and 5084 transitions. [2021-06-12 20:04:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:35,035 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 24 [2021-06-12 20:04:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:35,037 INFO L225 Difference]: With dead ends: 1581 [2021-06-12 20:04:35,037 INFO L226 Difference]: Without dead ends: 1543 [2021-06-12 20:04:35,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-12 20:04:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1264. [2021-06-12 20:04:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.2889944576405385) internal successors, (4154), 1263 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4154 transitions. [2021-06-12 20:04:35,050 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4154 transitions. Word has length 24 [2021-06-12 20:04:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:35,051 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 4154 transitions. [2021-06-12 20:04:35,051 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 20:04:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4154 transitions. [2021-06-12 20:04:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:35,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:35,052 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:35,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-06-12 20:04:35,252 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash 962500506, now seen corresponding path program 419 times [2021-06-12 20:04:35,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:35,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488784051] [2021-06-12 20:04:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:35,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488784051] [2021-06-12 20:04:35,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488784051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438347850] [2021-06-12 20:04:35,395 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 20:04:35,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:04:35,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:35,475 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 24 treesize of output 18 [2021-06-12 20:04:35,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,478 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 24 treesize of output 18 [2021-06-12 20:04:35,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:35,497 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 20:04:35,535 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 28 treesize of output 22 [2021-06-12 20:04:35,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,553 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:35,555 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 28 treesize of output 22 [2021-06-12 20:04:35,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:35,572 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1469 vanished before elimination [2021-06-12 20:04:35,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:35,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-12 20:04:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:35,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438347850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:35,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:35,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897861201] [2021-06-12 20:04:35,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:35,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:35,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:35,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:35,664 INFO L87 Difference]: Start difference. First operand 1264 states and 4154 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 20:04:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:35,869 INFO L93 Difference]: Finished difference Result 1609 states and 5139 transitions. [2021-06-12 20:04:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:35,869 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 24 [2021-06-12 20:04:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:35,871 INFO L225 Difference]: With dead ends: 1609 [2021-06-12 20:04:35,871 INFO L226 Difference]: Without dead ends: 1547 [2021-06-12 20:04:35,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-06-12 20:04:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1247. [2021-06-12 20:04:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.2776886035313) internal successors, (4084), 1246 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4084 transitions. [2021-06-12 20:04:35,891 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4084 transitions. Word has length 24 [2021-06-12 20:04:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:35,891 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4084 transitions. [2021-06-12 20:04:35,891 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 20:04:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4084 transitions. [2021-06-12 20:04:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:35,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:35,892 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:36,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:36,093 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash -27430924, now seen corresponding path program 420 times [2021-06-12 20:04:36,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:36,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319390574] [2021-06-12 20:04:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:36,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:36,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319390574] [2021-06-12 20:04:36,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319390574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:36,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227075852] [2021-06-12 20:04:36,313 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 20:04:36,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:36,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:36,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:36,384 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 24 treesize of output 18 [2021-06-12 20:04:36,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,386 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 24 treesize of output 18 [2021-06-12 20:04:36,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:36,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:36,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 20:04:36,461 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 28 treesize of output 22 [2021-06-12 20:04:36,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,463 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 28 treesize of output 22 [2021-06-12 20:04:36,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:36,480 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:04:36,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:36,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-12 20:04:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:36,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227075852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:36,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:36,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:04:36,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871473036] [2021-06-12 20:04:36,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:04:36,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:04:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:04:36,563 INFO L87 Difference]: Start difference. First operand 1247 states and 4084 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 20:04:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:36,812 INFO L93 Difference]: Finished difference Result 1738 states and 5554 transitions. [2021-06-12 20:04:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:36,812 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 24 [2021-06-12 20:04:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:36,814 INFO L225 Difference]: With dead ends: 1738 [2021-06-12 20:04:36,814 INFO L226 Difference]: Without dead ends: 1676 [2021-06-12 20:04:36,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-06-12 20:04:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1242. [2021-06-12 20:04:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.280419016921837) internal successors, (4071), 1241 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4071 transitions. [2021-06-12 20:04:36,828 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4071 transitions. Word has length 24 [2021-06-12 20:04:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:36,828 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4071 transitions. [2021-06-12 20:04:36,828 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 20:04:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4071 transitions. [2021-06-12 20:04:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:36,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:36,830 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:37,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-12 20:04:37,030 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1757856568, now seen corresponding path program 421 times [2021-06-12 20:04:37,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:37,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473123034] [2021-06-12 20:04:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:37,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:37,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473123034] [2021-06-12 20:04:37,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473123034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917666113] [2021-06-12 20:04:37,219 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 20:04:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:37,284 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 17 treesize of output 13 [2021-06-12 20:04:37,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,287 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 20:04:37,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,290 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 18 treesize of output 14 [2021-06-12 20:04:37,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,292 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 18 treesize of output 14 [2021-06-12 20:04:37,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:37,329 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:37,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,481 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 19 treesize of output 15 [2021-06-12 20:04:37,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:37,534 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:37,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:37,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:04:37,643 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:37,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,690 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 20 treesize of output 16 [2021-06-12 20:04:37,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,736 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 13 treesize of output 9 [2021-06-12 20:04:37,737 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:37,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:37,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:37,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:37,823 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 13 treesize of output 9 [2021-06-12 20:04:37,824 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:37,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:37,863 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 20:04:37,863 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:04:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:38,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917666113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:38,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:38,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079292699] [2021-06-12 20:04:38,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:38,002 INFO L87 Difference]: Start difference. First operand 1242 states and 4071 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:38,923 INFO L93 Difference]: Finished difference Result 2139 states and 6732 transitions. [2021-06-12 20:04:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:38,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:38,926 INFO L225 Difference]: With dead ends: 2139 [2021-06-12 20:04:38,926 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 20:04:38,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1009.5ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:04:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 20:04:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1267. [2021-06-12 20:04:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.293838862559242) internal successors, (4170), 1266 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4170 transitions. [2021-06-12 20:04:38,942 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4170 transitions. Word has length 24 [2021-06-12 20:04:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:38,942 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4170 transitions. [2021-06-12 20:04:38,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4170 transitions. [2021-06-12 20:04:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:38,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:38,944 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:39,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3404,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:39,144 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:39,144 INFO L82 PathProgramCache]: Analyzing trace with hash -983652198, now seen corresponding path program 422 times [2021-06-12 20:04:39,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:39,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037766527] [2021-06-12 20:04:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:39,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:39,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037766527] [2021-06-12 20:04:39,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037766527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439691685] [2021-06-12 20:04:39,331 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 20:04:39,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:39,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:39,404 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 18 treesize of output 14 [2021-06-12 20:04:39,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:04:39,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,410 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 17 treesize of output 13 [2021-06-12 20:04:39,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,412 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 17 treesize of output 13 [2021-06-12 20:04:39,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:39,450 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:39,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:39,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,649 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 7 [2021-06-12 20:04:39,650 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:39,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,673 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 20:04:39,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,694 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 12 treesize of output 8 [2021-06-12 20:04:39,695 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:39,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:39,713 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 20:04:39,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:04:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439691685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:39,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905626223] [2021-06-12 20:04:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:39,796 INFO L87 Difference]: Start difference. First operand 1267 states and 4170 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:40,512 INFO L93 Difference]: Finished difference Result 2120 states and 6713 transitions. [2021-06-12 20:04:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:04:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:40,515 INFO L225 Difference]: With dead ends: 2120 [2021-06-12 20:04:40,515 INFO L226 Difference]: Without dead ends: 2031 [2021-06-12 20:04:40,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:04:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-12 20:04:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1270. [2021-06-12 20:04:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.297872340425532) internal successors, (4185), 1269 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4185 transitions. [2021-06-12 20:04:40,532 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4185 transitions. Word has length 24 [2021-06-12 20:04:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:40,532 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4185 transitions. [2021-06-12 20:04:40,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4185 transitions. [2021-06-12 20:04:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:40,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:40,533 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:40,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:40,734 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:40,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1145657428, now seen corresponding path program 423 times [2021-06-12 20:04:40,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:40,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487043401] [2021-06-12 20:04:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:40,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:40,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487043401] [2021-06-12 20:04:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487043401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315964275] [2021-06-12 20:04:40,915 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 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 20:04:40,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:40,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:40,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:40,982 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 20:04:40,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,985 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 17 treesize of output 13 [2021-06-12 20:04:40,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,987 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 18 treesize of output 14 [2021-06-12 20:04:40,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:04:40,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:41,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,194 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 20:04:41,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,218 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 7 [2021-06-12 20:04:41,219 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:41,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,241 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 20:04:41,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:41,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:41,262 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 11 treesize of output 7 [2021-06-12 20:04:41,263 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:41,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:41,281 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 20:04:41,281 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:04:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:41,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315964275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:41,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:41,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494500191] [2021-06-12 20:04:41,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:41,366 INFO L87 Difference]: Start difference. First operand 1270 states and 4185 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:41,941 INFO L93 Difference]: Finished difference Result 2282 states and 7267 transitions. [2021-06-12 20:04:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:41,944 INFO L225 Difference]: With dead ends: 2282 [2021-06-12 20:04:41,944 INFO L226 Difference]: Without dead ends: 2220 [2021-06-12 20:04:41,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 613.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-12 20:04:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1242. [2021-06-12 20:04:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.280419016921837) internal successors, (4071), 1241 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4071 transitions. [2021-06-12 20:04:41,960 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4071 transitions. Word has length 24 [2021-06-12 20:04:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:41,960 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4071 transitions. [2021-06-12 20:04:41,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4071 transitions. [2021-06-12 20:04:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:41,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:41,961 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:42,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3423,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:42,162 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash -721047532, now seen corresponding path program 424 times [2021-06-12 20:04:42,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:42,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60982032] [2021-06-12 20:04:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:42,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:42,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60982032] [2021-06-12 20:04:42,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60982032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:42,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030068505] [2021-06-12 20:04:42,353 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 20:04:42,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:42,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,481 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 19 treesize of output 15 [2021-06-12 20:04:42,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:42,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,562 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 19 treesize of output 15 [2021-06-12 20:04:42,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,566 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 20:04:42,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:42,638 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 20:04:42,816 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,819 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 30 treesize of output 24 [2021-06-12 20:04:42,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,823 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 29 treesize of output 23 [2021-06-12 20:04:42,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:42,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,830 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 20 treesize of output 16 [2021-06-12 20:04:42,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,922 INFO L628 ElimStorePlain]: treesize reduction 64, result has 63.6 percent of original size [2021-06-12 20:04:42,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,925 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 11 treesize of output 7 [2021-06-12 20:04:42,926 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:42,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,929 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 13 treesize of output 9 [2021-06-12 20:04:42,930 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:42,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:42,971 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 20:04:42,971 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:209, output treesize:53 [2021-06-12 20:04:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030068505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:43,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:43,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:43,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491377896] [2021-06-12 20:04:43,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:43,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:43,051 INFO L87 Difference]: Start difference. First operand 1242 states and 4071 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:43,330 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-12 20:04:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:43,741 INFO L93 Difference]: Finished difference Result 1401 states and 4525 transitions. [2021-06-12 20:04:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:43,743 INFO L225 Difference]: With dead ends: 1401 [2021-06-12 20:04:43,743 INFO L226 Difference]: Without dead ends: 1348 [2021-06-12 20:04:43,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-12 20:04:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1254. [2021-06-12 20:04:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 3.27853152434158) internal successors, (4108), 1253 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 4108 transitions. [2021-06-12 20:04:43,755 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 4108 transitions. Word has length 24 [2021-06-12 20:04:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:43,755 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 4108 transitions. [2021-06-12 20:04:43,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 4108 transitions. [2021-06-12 20:04:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:43,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:43,756 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:43,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3432,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:43,957 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1605589298, now seen corresponding path program 425 times [2021-06-12 20:04:43,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:43,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710831940] [2021-06-12 20:04:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:44,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:44,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710831940] [2021-06-12 20:04:44,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710831940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588777795] [2021-06-12 20:04:44,167 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 20:04:44,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:44,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:44,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,250 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 20:04:44,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,253 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 19 treesize of output 15 [2021-06-12 20:04:44,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:44,284 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 20:04:44,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-06-12 20:04:44,348 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:44,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,352 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 20 treesize of output 16 [2021-06-12 20:04:44,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,356 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 20 treesize of output 16 [2021-06-12 20:04:44,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,359 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 19 treesize of output 15 [2021-06-12 20:04:44,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:44,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:44,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,427 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 12 treesize of output 8 [2021-06-12 20:04:44,428 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:44,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,432 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 13 treesize of output 9 [2021-06-12 20:04:44,433 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,436 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 13 treesize of output 9 [2021-06-12 20:04:44,437 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:44,441 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:44,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:44,509 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 20:04:44,509 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-12 20:04:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:44,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588777795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:44,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:44,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029887790] [2021-06-12 20:04:44,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:44,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:44,628 INFO L87 Difference]: Start difference. First operand 1254 states and 4108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:45,510 INFO L93 Difference]: Finished difference Result 1517 states and 4852 transitions. [2021-06-12 20:04:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:45,512 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 20:04:45,512 INFO L226 Difference]: Without dead ends: 1451 [2021-06-12 20:04:45,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 848.1ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:04:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-12 20:04:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1257. [2021-06-12 20:04:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 3.2786624203821657) internal successors, (4118), 1256 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 4118 transitions. [2021-06-12 20:04:45,526 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 4118 transitions. Word has length 24 [2021-06-12 20:04:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:45,526 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 4118 transitions. [2021-06-12 20:04:45,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 4118 transitions. [2021-06-12 20:04:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:45,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:45,527 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:45,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3440,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:45,727 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash -738290948, now seen corresponding path program 426 times [2021-06-12 20:04:45,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:45,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63321300] [2021-06-12 20:04:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:45,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:45,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63321300] [2021-06-12 20:04:45,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63321300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348401238] [2021-06-12 20:04:45,888 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 20:04:45,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:04:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:46,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,040 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 20:04:46,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:04:46,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-12 20:04:46,137 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:46,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,145 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 19 treesize of output 15 [2021-06-12 20:04:46,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,149 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 20 treesize of output 16 [2021-06-12 20:04:46,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,153 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 20 treesize of output 16 [2021-06-12 20:04:46,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:46,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,224 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 13 treesize of output 9 [2021-06-12 20:04:46,225 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:46,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:04:46,230 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,233 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 12 treesize of output 8 [2021-06-12 20:04:46,234 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:46,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:46,237 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 11 treesize of output 7 [2021-06-12 20:04:46,238 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:46,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:46,296 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 20:04:46,296 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-06-12 20:04:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:46,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348401238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:46,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:46,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832462194] [2021-06-12 20:04:46,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:46,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:46,407 INFO L87 Difference]: Start difference. First operand 1257 states and 4118 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:46,834 INFO L93 Difference]: Finished difference Result 1458 states and 4640 transitions. [2021-06-12 20:04:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:46,836 INFO L225 Difference]: With dead ends: 1458 [2021-06-12 20:04:46,836 INFO L226 Difference]: Without dead ends: 1427 [2021-06-12 20:04:46,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:04:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-12 20:04:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1256. [2021-06-12 20:04:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.2772908366533864) internal successors, (4113), 1255 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4113 transitions. [2021-06-12 20:04:46,849 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4113 transitions. Word has length 24 [2021-06-12 20:04:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:46,849 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4113 transitions. [2021-06-12 20:04:46,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4113 transitions. [2021-06-12 20:04:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:46,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:46,851 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:47,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3446,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:47,051 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2056181010, now seen corresponding path program 427 times [2021-06-12 20:04:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:47,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131554635] [2021-06-12 20:04:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:47,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:47,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131554635] [2021-06-12 20:04:47,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131554635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:47,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700725308] [2021-06-12 20:04:47,214 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 20:04:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:47,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,340 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 19 treesize of output 15 [2021-06-12 20:04:47,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,344 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 20:04:47,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:47,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:47,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,425 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 20:04:47,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:47,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:47,495 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-12 20:04:47,667 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-12 20:04:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,670 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 30 treesize of output 24 [2021-06-12 20:04:47,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,674 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 30 treesize of output 24 [2021-06-12 20:04:47,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 20:04:47,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,681 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 29 treesize of output 23 [2021-06-12 20:04:47,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,776 INFO L628 ElimStorePlain]: treesize reduction 62, result has 62.9 percent of original size [2021-06-12 20:04:47,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,779 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 11 treesize of output 7 [2021-06-12 20:04:47,780 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,783 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 12 treesize of output 8 [2021-06-12 20:04:47,784 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:47,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:47,823 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 20:04:47,823 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:213, output treesize:47 [2021-06-12 20:04:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:47,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700725308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:47,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:47,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:47,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638333522] [2021-06-12 20:04:47,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:47,903 INFO L87 Difference]: Start difference. First operand 1256 states and 4113 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:48,146 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-12 20:04:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:48,472 INFO L93 Difference]: Finished difference Result 1444 states and 4594 transitions. [2021-06-12 20:04:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:48,474 INFO L225 Difference]: With dead ends: 1444 [2021-06-12 20:04:48,474 INFO L226 Difference]: Without dead ends: 1367 [2021-06-12 20:04:48,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-12 20:04:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1251. [2021-06-12 20:04:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.2784) internal successors, (4098), 1250 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4098 transitions. [2021-06-12 20:04:48,487 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4098 transitions. Word has length 24 [2021-06-12 20:04:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:48,487 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4098 transitions. [2021-06-12 20:04:48,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4098 transitions. [2021-06-12 20:04:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:48,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:48,489 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:48,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3458,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:48,690 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:48,690 INFO L82 PathProgramCache]: Analyzing trace with hash -420259806, now seen corresponding path program 428 times [2021-06-12 20:04:48,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:48,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982095788] [2021-06-12 20:04:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:48,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982095788] [2021-06-12 20:04:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982095788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159727163] [2021-06-12 20:04:48,904 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 20:04:48,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:48,999 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 20:04:49,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,002 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 18 treesize of output 14 [2021-06-12 20:04:49,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,005 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 18 treesize of output 14 [2021-06-12 20:04:49,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,007 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 20:04:49,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:49,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:49,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,144 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 20:04:49,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,196 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 12 treesize of output 8 [2021-06-12 20:04:49,198 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:49,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,249 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 20:04:49,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,298 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 20 treesize of output 16 [2021-06-12 20:04:49,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:04:49,347 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:49,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,394 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 20 treesize of output 16 [2021-06-12 20:04:49,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:49,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,438 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 12 treesize of output 8 [2021-06-12 20:04:49,439 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:49,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:49,481 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 13 treesize of output 9 [2021-06-12 20:04:49,482 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:49,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:49,521 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 20:04:49,521 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:04:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:49,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159727163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:49,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:49,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345124644] [2021-06-12 20:04:49,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:49,666 INFO L87 Difference]: Start difference. First operand 1251 states and 4098 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:50,168 INFO L93 Difference]: Finished difference Result 1620 states and 5122 transitions. [2021-06-12 20:04:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:04:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:50,171 INFO L225 Difference]: With dead ends: 1620 [2021-06-12 20:04:50,171 INFO L226 Difference]: Without dead ends: 1527 [2021-06-12 20:04:50,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 662.8ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:04:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-12 20:04:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1262. [2021-06-12 20:04:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.2870737509912766) internal successors, (4145), 1261 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4145 transitions. [2021-06-12 20:04:50,184 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4145 transitions. Word has length 24 [2021-06-12 20:04:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:50,184 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4145 transitions. [2021-06-12 20:04:50,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4145 transitions. [2021-06-12 20:04:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:50,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:50,186 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:50,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3470 [2021-06-12 20:04:50,386 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:50,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:50,386 INFO L82 PathProgramCache]: Analyzing trace with hash 353944564, now seen corresponding path program 429 times [2021-06-12 20:04:50,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:50,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136734791] [2021-06-12 20:04:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:50,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:50,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136734791] [2021-06-12 20:04:50,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136734791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:50,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752886793] [2021-06-12 20:04:50,669 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 20:04:50,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:50,763 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 18 treesize of output 14 [2021-06-12 20:04:50,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,766 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 20:04:50,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,769 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 20:04:50,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,771 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 18 treesize of output 14 [2021-06-12 20:04:50,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:50,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:50,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-12 20:04:50,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:50,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:50,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:50,957 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:50,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:50,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,980 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 19 treesize of output 15 [2021-06-12 20:04:50,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:51,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,001 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 12 treesize of output 8 [2021-06-12 20:04:51,002 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:51,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:51,020 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 20:04:51,020 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:04:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:51,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752886793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:51,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:51,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144875880] [2021-06-12 20:04:51,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:51,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:51,102 INFO L87 Difference]: Start difference. First operand 1262 states and 4145 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:51,358 INFO L93 Difference]: Finished difference Result 1460 states and 4689 transitions. [2021-06-12 20:04:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:04:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:51,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:51,360 INFO L225 Difference]: With dead ends: 1460 [2021-06-12 20:04:51,360 INFO L226 Difference]: Without dead ends: 1398 [2021-06-12 20:04:51,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-06-12 20:04:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1248. [2021-06-12 20:04:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.2790697674418605) internal successors, (4089), 1247 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4089 transitions. [2021-06-12 20:04:51,373 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4089 transitions. Word has length 24 [2021-06-12 20:04:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:51,373 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4089 transitions. [2021-06-12 20:04:51,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4089 transitions. [2021-06-12 20:04:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:51,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:51,374 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:51,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:51,574 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:51,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:51,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1147454640, now seen corresponding path program 430 times [2021-06-12 20:04:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:51,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703318692] [2021-06-12 20:04:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:51,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703318692] [2021-06-12 20:04:51,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703318692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211098516] [2021-06-12 20:04:51,786 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 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 20:04:51,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:51,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:51,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:51,856 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 20:04:51,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,859 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 18 treesize of output 14 [2021-06-12 20:04:51,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,861 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 18 treesize of output 14 [2021-06-12 20:04:51,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,864 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 20:04:51,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:51,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:51,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:52,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:04:52,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,240 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-12 20:04:52,240 INFO L628 ElimStorePlain]: treesize reduction 157, result has 54.8 percent of original size [2021-06-12 20:04:52,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,244 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 20:04:52,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:04:52,318 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:52,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1519 vanished before elimination [2021-06-12 20:04:52,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,391 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 20:04:52,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,462 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 12 treesize of output 8 [2021-06-12 20:04:52,463 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:52,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:04:52,531 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,534 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 20 treesize of output 16 [2021-06-12 20:04:52,535 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:52,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:52,598 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 13 treesize of output 9 [2021-06-12 20:04:52,599 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:52,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:52,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:04:52,658 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-12 20:04:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:52,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211098516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:52,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:52,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:52,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551103099] [2021-06-12 20:04:52,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:52,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:52,806 INFO L87 Difference]: Start difference. First operand 1248 states and 4089 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:53,144 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-12 20:04:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:54,037 INFO L93 Difference]: Finished difference Result 1847 states and 5848 transitions. [2021-06-12 20:04:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:04:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:54,040 INFO L225 Difference]: With dead ends: 1847 [2021-06-12 20:04:54,040 INFO L226 Difference]: Without dead ends: 1767 [2021-06-12 20:04:54,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1331.1ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:04:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-12 20:04:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1276. [2021-06-12 20:04:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.292549019607843) internal successors, (4198), 1275 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4198 transitions. [2021-06-12 20:04:54,054 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4198 transitions. Word has length 24 [2021-06-12 20:04:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:54,055 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4198 transitions. [2021-06-12 20:04:54,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4198 transitions. [2021-06-12 20:04:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:54,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:54,056 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:54,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3488 [2021-06-12 20:04:54,256 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 803632410, now seen corresponding path program 431 times [2021-06-12 20:04:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:54,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155702570] [2021-06-12 20:04:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:54,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155702570] [2021-06-12 20:04:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155702570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430417965] [2021-06-12 20:04:54,428 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 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 20:04:54,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:54,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:04:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:54,498 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 20:04:54,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,501 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 18 treesize of output 14 [2021-06-12 20:04:54,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,504 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 18 treesize of output 14 [2021-06-12 20:04:54,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,506 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 17 treesize of output 13 [2021-06-12 20:04:54,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:54,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,701 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 20 treesize of output 16 [2021-06-12 20:04:54,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,752 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 20:04:54,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,801 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 20 treesize of output 16 [2021-06-12 20:04:54,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,848 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 12 treesize of output 8 [2021-06-12 20:04:54,849 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:54,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:04:54,895 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:54,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,940 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 11 treesize of output 7 [2021-06-12 20:04:54,941 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:54,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:54,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,985 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 19 treesize of output 15 [2021-06-12 20:04:54,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:55,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:04:55,029 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:55,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:55,070 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 20:04:55,070 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:04:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:55,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430417965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:55,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:55,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448031643] [2021-06-12 20:04:55,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:55,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:55,183 INFO L87 Difference]: Start difference. First operand 1276 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:56,070 INFO L93 Difference]: Finished difference Result 1919 states and 6019 transitions. [2021-06-12 20:04:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:04:56,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:56,073 INFO L225 Difference]: With dead ends: 1919 [2021-06-12 20:04:56,073 INFO L226 Difference]: Without dead ends: 1857 [2021-06-12 20:04:56,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 940.4ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:04:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-06-12 20:04:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1273. [2021-06-12 20:04:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.292452830188679) internal successors, (4188), 1272 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4188 transitions. [2021-06-12 20:04:56,088 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4188 transitions. Word has length 24 [2021-06-12 20:04:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:56,088 INFO L482 AbstractCegarLoop]: Abstraction has 1273 states and 4188 transitions. [2021-06-12 20:04:56,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4188 transitions. [2021-06-12 20:04:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:56,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:56,089 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:56,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3495 [2021-06-12 20:04:56,290 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:56,290 INFO L82 PathProgramCache]: Analyzing trace with hash -373250270, now seen corresponding path program 432 times [2021-06-12 20:04:56,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:56,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125918879] [2021-06-12 20:04:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:56,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:56,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125918879] [2021-06-12 20:04:56,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125918879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:56,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058900515] [2021-06-12 20:04:56,508 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 20:04:56,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:56,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:56,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:56,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,581 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 18 treesize of output 14 [2021-06-12 20:04:56,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,584 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 17 treesize of output 13 [2021-06-12 20:04:56,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:04:56,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:56,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:56,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,806 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 20:04:56,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:04:56,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,869 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-06-12 20:04:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,872 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 19 treesize of output 15 [2021-06-12 20:04:56,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:56,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,897 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 7 [2021-06-12 20:04:56,898 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:56,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:56,922 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 12 treesize of output 8 [2021-06-12 20:04:56,923 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:56,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:56,943 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 20:04:56,943 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-06-12 20:04:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:57,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058900515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:57,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:57,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:57,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029591953] [2021-06-12 20:04:57,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:57,019 INFO L87 Difference]: Start difference. First operand 1273 states and 4188 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:58,364 INFO L93 Difference]: Finished difference Result 2106 states and 6619 transitions. [2021-06-12 20:04:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:04:58,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:04:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:58,367 INFO L225 Difference]: With dead ends: 2106 [2021-06-12 20:04:58,367 INFO L226 Difference]: Without dead ends: 1963 [2021-06-12 20:04:58,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1287.7ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:04:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-12 20:04:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1277. [2021-06-12 20:04:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.2970219435736676) internal successors, (4207), 1276 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4207 transitions. [2021-06-12 20:04:58,384 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4207 transitions. Word has length 24 [2021-06-12 20:04:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:58,384 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4207 transitions. [2021-06-12 20:04:58,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:04:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4207 transitions. [2021-06-12 20:04:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:04:58,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:58,385 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:58,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:58,585 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -535255500, now seen corresponding path program 433 times [2021-06-12 20:04:58,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:58,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945926492] [2021-06-12 20:04:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:58,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945926492] [2021-06-12 20:04:58,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945926492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626340524] [2021-06-12 20:04:58,774 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 20:04:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:58,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:04:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:58,843 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 18 treesize of output 14 [2021-06-12 20:04:58,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,845 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 18 treesize of output 14 [2021-06-12 20:04:58,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,848 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 17 treesize of output 13 [2021-06-12 20:04:58,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,851 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 20:04:58,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:58,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:58,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:04:58,888 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:04:59,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,042 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 19 treesize of output 15 [2021-06-12 20:04:59,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,046 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 20:04:59,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,107 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-06-12 20:04:59,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,110 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 11 treesize of output 7 [2021-06-12 20:04:59,111 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:59,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,136 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 19 treesize of output 15 [2021-06-12 20:04:59,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,160 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 11 treesize of output 7 [2021-06-12 20:04:59,161 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:04:59,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:04:59,182 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 20:04:59,182 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-06-12 20:04:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:04:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626340524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:59,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:04:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087612564] [2021-06-12 20:04:59,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:04:59,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:04:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:04:59,257 INFO L87 Difference]: Start difference. First operand 1277 states and 4207 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:05:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:00,270 INFO L93 Difference]: Finished difference Result 2042 states and 6399 transitions. [2021-06-12 20:05:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-06-12 20:05:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:00,272 INFO L225 Difference]: With dead ends: 2042 [2021-06-12 20:05:00,273 INFO L226 Difference]: Without dead ends: 1926 [2021-06-12 20:05:00,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:05:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-12 20:05:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1260. [2021-06-12 20:05:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 3.290706910246227) internal successors, (4143), 1259 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 4143 transitions. [2021-06-12 20:05:00,287 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 4143 transitions. Word has length 24 [2021-06-12 20:05:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:00,287 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 4143 transitions. [2021-06-12 20:05:00,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 20:05:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 4143 transitions. [2021-06-12 20:05:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:00,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:00,289 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:00,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:00,489 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -561114522, now seen corresponding path program 434 times [2021-06-12 20:05:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:00,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687102949] [2021-06-12 20:05:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:00,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687102949] [2021-06-12 20:05:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687102949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002301632] [2021-06-12 20:05:00,757 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 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 20:05:00,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:00,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:00,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:00,845 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 19 treesize of output 15 [2021-06-12 20:05:00,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,847 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 19 treesize of output 15 [2021-06-12 20:05:00,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:00,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:00,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 20:05:00,955 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 20 treesize of output 16 [2021-06-12 20:05:00,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,957 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 20:05:00,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,960 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 20 treesize of output 16 [2021-06-12 20:05:00,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:00,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:00,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:00,988 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 13 treesize of output 9 [2021-06-12 20:05:00,989 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:00,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 7 [2021-06-12 20:05:00,992 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:00,993 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 13 treesize of output 9 [2021-06-12 20:05:00,994 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:00,996 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 12 treesize of output 8 [2021-06-12 20:05:00,997 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:01,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:01,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:05:01,021 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:117, output treesize:57 [2021-06-12 20:05:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:01,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002301632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:01,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:01,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362617950] [2021-06-12 20:05:01,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:01,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:01,116 INFO L87 Difference]: Start difference. First operand 1260 states and 4143 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,824 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-12 20:05:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:02,050 INFO L93 Difference]: Finished difference Result 1851 states and 5862 transitions. [2021-06-12 20:05:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:02,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:02,053 INFO L225 Difference]: With dead ends: 1851 [2021-06-12 20:05:02,053 INFO L226 Difference]: Without dead ends: 1777 [2021-06-12 20:05:02,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1084.9ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:05:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-12 20:05:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1269. [2021-06-12 20:05:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2886435331230284) internal successors, (4170), 1268 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4170 transitions. [2021-06-12 20:05:02,068 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4170 transitions. Word has length 24 [2021-06-12 20:05:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:02,068 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4170 transitions. [2021-06-12 20:05:02,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4170 transitions. [2021-06-12 20:05:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:02,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:02,069 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:02,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3516 [2021-06-12 20:05:02,269 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1616972742, now seen corresponding path program 435 times [2021-06-12 20:05:02,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:02,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335644393] [2021-06-12 20:05:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335644393] [2021-06-12 20:05:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335644393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271521070] [2021-06-12 20:05:02,468 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 20:05:02,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:02,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:05:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:02,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,636 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 19 treesize of output 15 [2021-06-12 20:05:02,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,639 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 20:05:02,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:02,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,705 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 20:05:02,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,709 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 19 treesize of output 15 [2021-06-12 20:05:02,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:02,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:02,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:05:02,930 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1548, o_2], 1=[o_0, v_prenex_1547]} [2021-06-12 20:05:02,933 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 29 treesize of output 23 [2021-06-12 20:05:02,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,936 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 30 treesize of output 24 [2021-06-12 20:05:02,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,009 INFO L628 ElimStorePlain]: treesize reduction 59, result has 62.4 percent of original size [2021-06-12 20:05:03,011 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 11 treesize of output 9 [2021-06-12 20:05:03,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:03,041 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-06-12 20:05:03,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:05:03,045 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:03,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,048 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 11 treesize of output 7 [2021-06-12 20:05:03,049 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:03,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:03,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:03,078 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-06-12 20:05:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271521070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:03,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:03,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286735961] [2021-06-12 20:05:03,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:03,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:03,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:03,158 INFO L87 Difference]: Start difference. First operand 1269 states and 4170 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:03,882 INFO L93 Difference]: Finished difference Result 1663 states and 5326 transitions. [2021-06-12 20:05:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:03,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:03,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:03,884 INFO L225 Difference]: With dead ends: 1663 [2021-06-12 20:05:03,884 INFO L226 Difference]: Without dead ends: 1610 [2021-06-12 20:05:03,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:05:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-12 20:05:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1275. [2021-06-12 20:05:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.2880690737833596) internal successors, (4189), 1274 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4189 transitions. [2021-06-12 20:05:03,898 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4189 transitions. Word has length 24 [2021-06-12 20:05:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:03,898 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4189 transitions. [2021-06-12 20:05:03,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4189 transitions. [2021-06-12 20:05:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:03,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:03,900 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:04,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3523,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:04,100 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 709664088, now seen corresponding path program 436 times [2021-06-12 20:05:04,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:04,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277103620] [2021-06-12 20:05:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:04,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:04,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277103620] [2021-06-12 20:05:04,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277103620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022728382] [2021-06-12 20:05:04,320 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 20:05:04,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:04,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:05:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,487 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 19 treesize of output 15 [2021-06-12 20:05:04,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,491 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 19 treesize of output 15 [2021-06-12 20:05:04,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,557 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 20:05:04,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:04,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:04,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:04,619 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:05:04,736 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1554, v_prenex_1556, v_prenex_1558], 1=[o_0, v_prenex_1553, v_prenex_1555, v_prenex_1557]} [2021-06-12 20:05:04,740 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 20 treesize of output 16 [2021-06-12 20:05:04,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:04,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,905 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-12 20:05:04,906 INFO L628 ElimStorePlain]: treesize reduction 158, result has 54.6 percent of original size [2021-06-12 20:05:04,909 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 19 treesize of output 15 [2021-06-12 20:05:04,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:04,976 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 11 treesize of output 9 [2021-06-12 20:05:04,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:05,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,049 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 11 treesize of output 9 [2021-06-12 20:05:05,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:05,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:05,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:05,112 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 13 treesize of output 9 [2021-06-12 20:05:05,113 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:05,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:05:05,117 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:05,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:05,178 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 7 [2021-06-12 20:05:05,179 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:05,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:05,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1555 vanished before elimination [2021-06-12 20:05:05,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1557 vanished before elimination [2021-06-12 20:05:05,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:05:05,238 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-12 20:05:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:05,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022728382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:05,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:05,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:05,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116448084] [2021-06-12 20:05:05,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:05,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:05,384 INFO L87 Difference]: Start difference. First operand 1275 states and 4189 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,625 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-12 20:05:05,804 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-12 20:05:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:06,431 INFO L93 Difference]: Finished difference Result 1779 states and 5639 transitions. [2021-06-12 20:05:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:06,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:06,434 INFO L225 Difference]: With dead ends: 1779 [2021-06-12 20:05:06,434 INFO L226 Difference]: Without dead ends: 1699 [2021-06-12 20:05:06,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1191.0ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:05:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-06-12 20:05:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1278. [2021-06-12 20:05:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.2881754111198123) internal successors, (4199), 1277 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4199 transitions. [2021-06-12 20:05:06,448 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4199 transitions. Word has length 24 [2021-06-12 20:05:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:06,449 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4199 transitions. [2021-06-12 20:05:06,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4199 transitions. [2021-06-12 20:05:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:06,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:06,450 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:06,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:06,650 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1634216158, now seen corresponding path program 437 times [2021-06-12 20:05:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:06,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852140859] [2021-06-12 20:05:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:06,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:06,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852140859] [2021-06-12 20:05:06,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852140859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272634169] [2021-06-12 20:05:06,814 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 20:05:06,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:06,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:05:06,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:06,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,996 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 20:05:06,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,000 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 19 treesize of output 15 [2021-06-12 20:05:07,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,066 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 20:05:07,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:07,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:07,129 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:05:07,254 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1564, v_prenex_1566, v_prenex_1568], 1=[o_0, v_prenex_1563, v_prenex_1565, v_prenex_1567]} [2021-06-12 20:05:07,258 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 20:05:07,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,262 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 20 treesize of output 16 [2021-06-12 20:05:07,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,424 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-12 20:05:07,425 INFO L628 ElimStorePlain]: treesize reduction 156, result has 55.2 percent of original size [2021-06-12 20:05:07,428 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 11 treesize of output 9 [2021-06-12 20:05:07,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,497 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 19 treesize of output 15 [2021-06-12 20:05:07,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,501 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 20 treesize of output 16 [2021-06-12 20:05:07,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,574 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 20:05:07,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,635 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-06-12 20:05:07,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1563 vanished before elimination [2021-06-12 20:05:07,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,639 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 13 treesize of output 9 [2021-06-12 20:05:07,640 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:07,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,643 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 12 treesize of output 8 [2021-06-12 20:05:07,644 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:07,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,704 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 12 treesize of output 8 [2021-06-12 20:05:07,705 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:07,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:07,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:05:07,764 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-12 20:05:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:07,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272634169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:07,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:07,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:07,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939226024] [2021-06-12 20:05:07,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:07,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:07,905 INFO L87 Difference]: Start difference. First operand 1278 states and 4199 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,270 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-12 20:05:08,497 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-12 20:05:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:08,924 INFO L93 Difference]: Finished difference Result 1934 states and 5962 transitions. [2021-06-12 20:05:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:08,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:08,926 INFO L225 Difference]: With dead ends: 1934 [2021-06-12 20:05:08,926 INFO L226 Difference]: Without dead ends: 1794 [2021-06-12 20:05:08,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1142.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:05:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-12 20:05:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1299. [2021-06-12 20:05:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-12 20:05:08,942 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-12 20:05:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:08,942 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-12 20:05:08,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-12 20:05:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:08,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:08,943 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:09,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3547 [2021-06-12 20:05:09,143 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:09,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1160255800, now seen corresponding path program 438 times [2021-06-12 20:05:09,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:09,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218474386] [2021-06-12 20:05:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:09,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:09,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218474386] [2021-06-12 20:05:09,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218474386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574098474] [2021-06-12 20:05:09,310 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 20:05:09,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:09,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:09,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,480 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 19 treesize of output 15 [2021-06-12 20:05:09,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,507 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 20:05:09,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:09,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-06-12 20:05:09,616 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:05:09,618 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 29 treesize of output 23 [2021-06-12 20:05:09,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,620 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 30 treesize of output 24 [2021-06-12 20:05:09,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,641 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 12 treesize of output 8 [2021-06-12 20:05:09,642 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:09,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:09,644 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 22 treesize of output 14 [2021-06-12 20:05:09,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:09,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:09,660 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 20:05:09,660 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:27 [2021-06-12 20:05:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:09,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574098474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:09,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822840560] [2021-06-12 20:05:09,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:09,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:09,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:09,731 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:10,228 INFO L93 Difference]: Finished difference Result 1652 states and 5284 transitions. [2021-06-12 20:05:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:10,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:10,230 INFO L225 Difference]: With dead ends: 1652 [2021-06-12 20:05:10,230 INFO L226 Difference]: Without dead ends: 1621 [2021-06-12 20:05:10,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-12 20:05:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1299. [2021-06-12 20:05:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-12 20:05:10,244 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-12 20:05:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:10,244 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-12 20:05:10,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-12 20:05:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:10,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:10,246 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:10,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-06-12 20:05:10,446 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1316185016, now seen corresponding path program 439 times [2021-06-12 20:05:10,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:10,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084787692] [2021-06-12 20:05:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:10,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:10,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084787692] [2021-06-12 20:05:10,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084787692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657653566] [2021-06-12 20:05:10,659 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 20:05:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:10,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:10,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:10,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,822 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 17 treesize of output 13 [2021-06-12 20:05:10,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,825 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 18 treesize of output 14 [2021-06-12 20:05:10,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:10,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,880 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 17 treesize of output 13 [2021-06-12 20:05:10,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:10,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:10,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:05:11,028 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1575, v_prenex_1577, v_prenex_1579], 1=[v_prenex_1580, o_4, v_prenex_1576, v_prenex_1578]} [2021-06-12 20:05:11,031 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 20:05:11,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,083 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 20 treesize of output 16 [2021-06-12 20:05:11,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,132 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 19 treesize of output 15 [2021-06-12 20:05:11,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,181 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 20 treesize of output 16 [2021-06-12 20:05:11,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,227 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 12 treesize of output 8 [2021-06-12 20:05:11,228 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:11,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,272 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 7 [2021-06-12 20:05:11,273 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:11,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:05:11,318 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:11,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,359 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 7 [2021-06-12 20:05:11,360 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:11,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:11,399 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 20:05:11,399 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:05:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:11,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657653566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:11,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:11,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:11,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573707546] [2021-06-12 20:05:11,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:11,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:11,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:11,541 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:12,363 INFO L93 Difference]: Finished difference Result 1916 states and 6032 transitions. [2021-06-12 20:05:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:12,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:12,366 INFO L225 Difference]: With dead ends: 1916 [2021-06-12 20:05:12,366 INFO L226 Difference]: Without dead ends: 1823 [2021-06-12 20:05:12,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1018.7ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:05:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-06-12 20:05:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1310. [2021-06-12 20:05:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.2971734148204734) internal successors, (4316), 1309 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4316 transitions. [2021-06-12 20:05:12,382 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4316 transitions. Word has length 24 [2021-06-12 20:05:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:12,382 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4316 transitions. [2021-06-12 20:05:12,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4316 transitions. [2021-06-12 20:05:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:12,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:12,384 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:12,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:12,584 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:12,584 INFO L82 PathProgramCache]: Analyzing trace with hash -541980646, now seen corresponding path program 440 times [2021-06-12 20:05:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839263924] [2021-06-12 20:05:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:12,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:12,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839263924] [2021-06-12 20:05:12,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839263924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:12,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008343191] [2021-06-12 20:05:12,882 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 20:05:12,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:12,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:13,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,048 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 18 treesize of output 14 [2021-06-12 20:05:13,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,051 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 17 treesize of output 13 [2021-06-12 20:05:13,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,105 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 17 treesize of output 13 [2021-06-12 20:05:13,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:13,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:13,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:05:13,272 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1585], 1=[o_4, v_prenex_1586]} [2021-06-12 20:05:13,274 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 19 treesize of output 15 [2021-06-12 20:05:13,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,298 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 20:05:13,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,320 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 7 [2021-06-12 20:05:13,321 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:13,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:05:13,343 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:13,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:13,361 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 20:05:13,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:05:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:13,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008343191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:13,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112620046] [2021-06-12 20:05:13,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:13,446 INFO L87 Difference]: Start difference. First operand 1310 states and 4316 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:13,887 INFO L93 Difference]: Finished difference Result 1769 states and 5631 transitions. [2021-06-12 20:05:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:13,889 INFO L225 Difference]: With dead ends: 1769 [2021-06-12 20:05:13,889 INFO L226 Difference]: Without dead ends: 1707 [2021-06-12 20:05:13,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-12 20:05:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1299. [2021-06-12 20:05:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-12 20:05:13,904 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-12 20:05:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:13,904 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-12 20:05:13,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-12 20:05:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:13,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:13,905 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:14,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-12 20:05:14,106 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -136308526, now seen corresponding path program 441 times [2021-06-12 20:05:14,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:14,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927682346] [2021-06-12 20:05:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:14,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:14,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927682346] [2021-06-12 20:05:14,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927682346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061829906] [2021-06-12 20:05:14,291 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 20:05:14,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:14,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:14,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:14,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:14,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,466 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 20:05:14,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,474 INFO 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 20:05:14,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 20:05:14,507 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-12 20:05:14,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:05:14,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,511 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 19 treesize of output 15 [2021-06-12 20:05:14,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,540 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 13 treesize of output 9 [2021-06-12 20:05:14,542 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:14,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,544 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 7 [2021-06-12 20:05:14,545 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:14,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:14,562 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 20:05:14,562 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:69, output treesize:27 [2021-06-12 20:05:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:14,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061829906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:14,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:14,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367004690] [2021-06-12 20:05:14,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:14,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:14,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:14,630 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:15,012 INFO L93 Difference]: Finished difference Result 1652 states and 5284 transitions. [2021-06-12 20:05:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:15,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:15,014 INFO L225 Difference]: With dead ends: 1652 [2021-06-12 20:05:15,014 INFO L226 Difference]: Without dead ends: 1621 [2021-06-12 20:05:15,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-12 20:05:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1299. [2021-06-12 20:05:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-12 20:05:15,028 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-12 20:05:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:15,028 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-12 20:05:15,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-12 20:05:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:15,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:15,029 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:15,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3593,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:15,230 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:15,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1353698938, now seen corresponding path program 442 times [2021-06-12 20:05:15,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:15,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853464621] [2021-06-12 20:05:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:15,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853464621] [2021-06-12 20:05:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853464621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767817286] [2021-06-12 20:05:15,384 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 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 20:05:15,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:15,487 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 28 treesize of output 22 [2021-06-12 20:05:15,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,490 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 37 treesize of output 29 [2021-06-12 20:05:15,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:15,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:15,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:72 [2021-06-12 20:05:15,550 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 31 treesize of output 25 [2021-06-12 20:05:15,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:15,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:05:15,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:15,583 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:15,585 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 41 treesize of output 33 [2021-06-12 20:05:15,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:15,588 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 40 treesize of output 32 [2021-06-12 20:05:15,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,645 INFO L628 ElimStorePlain]: treesize reduction 5, result has 93.5 percent of original size [2021-06-12 20:05:15,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1588 vanished before elimination [2021-06-12 20:05:15,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:05:15,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:167, output treesize:72 [2021-06-12 20:05:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:15,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767817286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:15,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 20:05:15,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476655448] [2021-06-12 20:05:15,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:05:15,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:05:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:15,717 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 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 20:05:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:16,085 INFO L93 Difference]: Finished difference Result 1692 states and 5383 transitions. [2021-06-12 20:05:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:16,085 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 24 [2021-06-12 20:05:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:16,087 INFO L225 Difference]: With dead ends: 1692 [2021-06-12 20:05:16,087 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 20:05:16,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 20:05:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1299. [2021-06-12 20:05:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-12 20:05:16,101 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-12 20:05:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:16,101 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-12 20:05:16,101 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 20:05:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-12 20:05:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:16,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:16,103 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:16,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:16,303 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:16,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1457190698, now seen corresponding path program 443 times [2021-06-12 20:05:16,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:16,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142139294] [2021-06-12 20:05:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:16,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142139294] [2021-06-12 20:05:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142139294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145157337] [2021-06-12 20:05:16,509 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 20:05:16,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:05:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:05:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:16,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,669 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 20:05:16,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,677 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 20:05:16,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:05:16,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:16,746 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 19 treesize of output 15 [2021-06-12 20:05:16,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:16,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:16,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:05:16,966 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1595], 1=[o_0, v_prenex_1594]} [2021-06-12 20:05:16,969 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 29 treesize of output 23 [2021-06-12 20:05:16,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:16,972 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 30 treesize of output 24 [2021-06-12 20:05:16,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,054 INFO L628 ElimStorePlain]: treesize reduction 56, result has 64.3 percent of original size [2021-06-12 20:05:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:05:17,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,059 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 20:05:17,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:17,089 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-06-12 20:05:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:05:17,093 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:05:17,096 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:17,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:17,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:17,126 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-06-12 20:05:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:17,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145157337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:17,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:17,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:17,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134116688] [2021-06-12 20:05:17,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:17,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:17,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:17,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:17,206 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:17,446 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-12 20:05:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:17,983 INFO L93 Difference]: Finished difference Result 1669 states and 5358 transitions. [2021-06-12 20:05:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:17,985 INFO L225 Difference]: With dead ends: 1669 [2021-06-12 20:05:17,986 INFO L226 Difference]: Without dead ends: 1616 [2021-06-12 20:05:17,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 852.3ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:05:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-12 20:05:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1311. [2021-06-12 20:05:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.287022900763359) internal successors, (4306), 1310 states have internal predecessors, (4306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4306 transitions. [2021-06-12 20:05:18,005 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4306 transitions. Word has length 24 [2021-06-12 20:05:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:18,005 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4306 transitions. [2021-06-12 20:05:18,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4306 transitions. [2021-06-12 20:05:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:18,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:18,006 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:18,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:18,207 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash -511139768, now seen corresponding path program 444 times [2021-06-12 20:05:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:18,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107729054] [2021-06-12 20:05:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:18,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107729054] [2021-06-12 20:05:18,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107729054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:18,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675866681] [2021-06-12 20:05:18,427 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 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 20:05:18,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:18,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,588 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 19 treesize of output 15 [2021-06-12 20:05:18,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,616 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 20:05:18,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:05:18,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-06-12 20:05:18,701 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1599], 1=[o_0, v_prenex_1598]} [2021-06-12 20:05:18,703 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 19 treesize of output 15 [2021-06-12 20:05:18,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,706 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 20 treesize of output 16 [2021-06-12 20:05:18,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,760 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 20:05:18,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,763 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 20 treesize of output 16 [2021-06-12 20:05:18,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:05:18,814 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:18,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,816 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 13 treesize of output 9 [2021-06-12 20:05:18,817 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:18,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,873 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 12 treesize of output 8 [2021-06-12 20:05:18,874 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:18,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:05:18,878 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:18,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:18,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:05:18,920 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-06-12 20:05:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:19,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675866681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:19,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:19,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:19,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420444675] [2021-06-12 20:05:19,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:19,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:19,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:19,066 INFO L87 Difference]: Start difference. First operand 1311 states and 4306 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:19,666 INFO L93 Difference]: Finished difference Result 1698 states and 5423 transitions. [2021-06-12 20:05:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:19,668 INFO L225 Difference]: With dead ends: 1698 [2021-06-12 20:05:19,668 INFO L226 Difference]: Without dead ends: 1632 [2021-06-12 20:05:19,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 681.7ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-12 20:05:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1308. [2021-06-12 20:05:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.2869166029074215) internal successors, (4296), 1307 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4296 transitions. [2021-06-12 20:05:19,689 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4296 transitions. Word has length 24 [2021-06-12 20:05:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:19,689 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 4296 transitions. [2021-06-12 20:05:19,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4296 transitions. [2021-06-12 20:05:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:19,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:19,691 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:19,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-06-12 20:05:19,891 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:19,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1757978424, now seen corresponding path program 445 times [2021-06-12 20:05:19,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:19,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220485869] [2021-06-12 20:05:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:20,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:20,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220485869] [2021-06-12 20:05:20,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220485869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192438624] [2021-06-12 20:05:20,100 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 20:05:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:20,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,263 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 17 treesize of output 13 [2021-06-12 20:05:20,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,266 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 18 treesize of output 14 [2021-06-12 20:05:20,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,319 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 18 treesize of output 14 [2021-06-12 20:05:20,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,322 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 20:05:20,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:20,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:05:20,462 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1604, v_prenex_1606, o_2, v_prenex_1608], 1=[v_prenex_1605, o_4, v_prenex_1607, v_prenex_1609]} [2021-06-12 20:05:20,465 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 20 treesize of output 16 [2021-06-12 20:05:20,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,517 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 20 treesize of output 16 [2021-06-12 20:05:20,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,573 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 19 treesize of output 15 [2021-06-12 20:05:20,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,620 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 19 treesize of output 15 [2021-06-12 20:05:20,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,666 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 12 treesize of output 8 [2021-06-12 20:05:20,667 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:20,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,711 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 11 treesize of output 7 [2021-06-12 20:05:20,712 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:20,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,755 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 8 [2021-06-12 20:05:20,756 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:20,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,798 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 11 treesize of output 7 [2021-06-12 20:05:20,799 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:20,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:20,838 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 20:05:20,838 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:05:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:20,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192438624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:20,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:20,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7187844] [2021-06-12 20:05:20,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:20,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:20,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:20,980 INFO L87 Difference]: Start difference. First operand 1308 states and 4296 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:21,809 INFO L93 Difference]: Finished difference Result 1885 states and 5945 transitions. [2021-06-12 20:05:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:21,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:21,812 INFO L225 Difference]: With dead ends: 1885 [2021-06-12 20:05:21,812 INFO L226 Difference]: Without dead ends: 1792 [2021-06-12 20:05:21,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 983.8ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:05:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-12 20:05:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1319. [2021-06-12 20:05:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.295144157814871) internal successors, (4343), 1318 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4343 transitions. [2021-06-12 20:05:21,828 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4343 transitions. Word has length 24 [2021-06-12 20:05:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:21,828 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 4343 transitions. [2021-06-12 20:05:21,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4343 transitions. [2021-06-12 20:05:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:21,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:21,829 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:22,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3626,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:22,030 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1762784502, now seen corresponding path program 446 times [2021-06-12 20:05:22,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:22,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912749480] [2021-06-12 20:05:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:22,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912749480] [2021-06-12 20:05:22,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912749480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504167379] [2021-06-12 20:05:22,329 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 20:05:22,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:22,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:22,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,510 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 17 treesize of output 13 [2021-06-12 20:05:22,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,513 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 18 treesize of output 14 [2021-06-12 20:05:22,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,565 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 18 treesize of output 14 [2021-06-12 20:05:22,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,569 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 20:05:22,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:22,617 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:05:22,732 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1614, o_2], 1=[v_prenex_1615, o_4]} [2021-06-12 20:05:22,734 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 19 treesize of output 15 [2021-06-12 20:05:22,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,757 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 20:05:22,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,779 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 11 treesize of output 7 [2021-06-12 20:05:22,780 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:22,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,801 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 11 treesize of output 7 [2021-06-12 20:05:22,802 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:22,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:22,820 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 20:05:22,820 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:05:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504167379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:22,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:22,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452615837] [2021-06-12 20:05:22,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:22,904 INFO L87 Difference]: Start difference. First operand 1319 states and 4343 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:23,386 INFO L93 Difference]: Finished difference Result 1738 states and 5544 transitions. [2021-06-12 20:05:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:23,388 INFO L225 Difference]: With dead ends: 1738 [2021-06-12 20:05:23,388 INFO L226 Difference]: Without dead ends: 1676 [2021-06-12 20:05:23,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-06-12 20:05:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1306. [2021-06-12 20:05:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.2881226053639847) internal successors, (4291), 1305 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4291 transitions. [2021-06-12 20:05:23,403 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4291 transitions. Word has length 24 [2021-06-12 20:05:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:23,403 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4291 transitions. [2021-06-12 20:05:23,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4291 transitions. [2021-06-12 20:05:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:23,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:23,405 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:23,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-12 20:05:23,605 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1030783590, now seen corresponding path program 447 times [2021-06-12 20:05:23,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:23,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514522338] [2021-06-12 20:05:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:23,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514522338] [2021-06-12 20:05:23,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514522338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866356698] [2021-06-12 20:05:23,781 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 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 20:05:23,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:23,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,901 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 17 treesize of output 13 [2021-06-12 20:05:23,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,905 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 18 treesize of output 14 [2021-06-12 20:05:23,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:23,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:23,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,955 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 17 treesize of output 13 [2021-06-12 20:05:23,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:23,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:23,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-06-12 20:05:24,155 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1620, v_prenex_1622, v_prenex_1624], 1=[v_prenex_1625, o_4, v_prenex_1621, v_prenex_1623]} [2021-06-12 20:05:24,158 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 19 treesize of output 15 [2021-06-12 20:05:24,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,208 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 20 treesize of output 16 [2021-06-12 20:05:24,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,257 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 19 treesize of output 15 [2021-06-12 20:05:24,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,304 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 20 treesize of output 16 [2021-06-12 20:05:24,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:24,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:24,351 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 12 treesize of output 8 [2021-06-12 20:05:24,352 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:24,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:24,398 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 11 treesize of output 7 [2021-06-12 20:05:24,399 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:24,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:05:24,444 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:24,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:24,486 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 11 treesize of output 7 [2021-06-12 20:05:24,487 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:24,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:24,526 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 20:05:24,526 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-12 20:05:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866356698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:24,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:24,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:24,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434921770] [2021-06-12 20:05:24,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:24,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:24,672 INFO L87 Difference]: Start difference. First operand 1306 states and 4291 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,155 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-12 20:05:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:25,969 INFO L93 Difference]: Finished difference Result 2071 states and 6499 transitions. [2021-06-12 20:05:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:25,971 INFO L225 Difference]: With dead ends: 2071 [2021-06-12 20:05:25,971 INFO L226 Difference]: Without dead ends: 1978 [2021-06-12 20:05:25,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1387.9ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:05:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-06-12 20:05:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1331. [2021-06-12 20:05:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.300751879699248) internal successors, (4390), 1330 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4390 transitions. [2021-06-12 20:05:25,988 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4390 transitions. Word has length 24 [2021-06-12 20:05:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:25,988 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4390 transitions. [2021-06-12 20:05:25,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4390 transitions. [2021-06-12 20:05:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:25,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:25,989 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:26,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-12 20:05:26,190 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1804987960, now seen corresponding path program 448 times [2021-06-12 20:05:26,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:26,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050006529] [2021-06-12 20:05:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:26,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050006529] [2021-06-12 20:05:26,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050006529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834006386] [2021-06-12 20:05:26,407 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 20:05:26,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:26,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,530 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 17 treesize of output 13 [2021-06-12 20:05:26,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,534 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 18 treesize of output 14 [2021-06-12 20:05:26,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,581 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 17 treesize of output 13 [2021-06-12 20:05:26,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:26,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:26,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-06-12 20:05:26,816 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1630], 1=[o_4, v_prenex_1631]} [2021-06-12 20:05:26,819 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 19 treesize of output 15 [2021-06-12 20:05:26,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,842 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 20:05:26,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:05:26,865 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:26,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,885 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 7 [2021-06-12 20:05:26,886 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:26,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:26,904 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 20:05:26,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-12 20:05:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834006386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:26,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:26,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566070145] [2021-06-12 20:05:26,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:26,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:26,991 INFO L87 Difference]: Start difference. First operand 1331 states and 4390 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,312 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-12 20:05:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:28,315 INFO L93 Difference]: Finished difference Result 2103 states and 6615 transitions. [2021-06-12 20:05:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:28,318 INFO L225 Difference]: With dead ends: 2103 [2021-06-12 20:05:28,318 INFO L226 Difference]: Without dead ends: 2014 [2021-06-12 20:05:28,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1431.8ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:05:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-12 20:05:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1334. [2021-06-12 20:05:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.304576144036009) internal successors, (4405), 1333 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4405 transitions. [2021-06-12 20:05:28,335 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4405 transitions. Word has length 24 [2021-06-12 20:05:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:28,335 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4405 transitions. [2021-06-12 20:05:28,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4405 transitions. [2021-06-12 20:05:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:28,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:28,337 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:28,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3663,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:28,537 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1642982730, now seen corresponding path program 449 times [2021-06-12 20:05:28,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:28,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014692628] [2021-06-12 20:05:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:28,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014692628] [2021-06-12 20:05:28,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014692628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388389430] [2021-06-12 20:05:28,730 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 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 20:05:28,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:28,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:28,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:28,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,820 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 20:05:28,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,823 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 18 treesize of output 14 [2021-06-12 20:05:28,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,839 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 20:05:28,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-12 20:05:28,912 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-12 20:05:28,914 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 19 treesize of output 15 [2021-06-12 20:05:28,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,917 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 20:05:28,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,942 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 11 treesize of output 7 [2021-06-12 20:05:28,943 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:28,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,945 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 7 [2021-06-12 20:05:28,946 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:28,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:28,966 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 20:05:28,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-12 20:05:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:29,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388389430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:29,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:29,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32911390] [2021-06-12 20:05:29,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:29,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:29,044 INFO L87 Difference]: Start difference. First operand 1334 states and 4405 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:30,114 INFO L93 Difference]: Finished difference Result 2137 states and 6740 transitions. [2021-06-12 20:05:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:05:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:30,117 INFO L225 Difference]: With dead ends: 2137 [2021-06-12 20:05:30,117 INFO L226 Difference]: Without dead ends: 2078 [2021-06-12 20:05:30,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-12 20:05:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1317. [2021-06-12 20:05:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.298632218844985) internal successors, (4341), 1316 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4341 transitions. [2021-06-12 20:05:30,134 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4341 transitions. Word has length 24 [2021-06-12 20:05:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:30,134 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 4341 transitions. [2021-06-12 20:05:30,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4341 transitions. [2021-06-12 20:05:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:05:30,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:30,135 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:30,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3675,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:30,336 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1658899902, now seen corresponding path program 450 times [2021-06-12 20:05:30,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:30,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732665663] [2021-06-12 20:05:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:30,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:30,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732665663] [2021-06-12 20:05:30,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732665663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395149725] [2021-06-12 20:05:30,507 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 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 20:05:30,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:30,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:30,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:05:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:30,604 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 27 treesize of output 21 [2021-06-12 20:05:30,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:30,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:28 [2021-06-12 20:05:30,631 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 29 treesize of output 23 [2021-06-12 20:05:30,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,633 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 30 treesize of output 24 [2021-06-12 20:05:30,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:30,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:30,643 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:05:30,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:30,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:27 [2021-06-12 20:05:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:30,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395149725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:30,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:05:30,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194375119] [2021-06-12 20:05:30,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:30,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:30,711 INFO L87 Difference]: Start difference. First operand 1317 states and 4341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:30,975 INFO L93 Difference]: Finished difference Result 1567 states and 5038 transitions. [2021-06-12 20:05:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:05:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:30,977 INFO L225 Difference]: With dead ends: 1567 [2021-06-12 20:05:30,977 INFO L226 Difference]: Without dead ends: 1536 [2021-06-12 20:05:30,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-12 20:05:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1309. [2021-06-12 20:05:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3035168195718656) internal successors, (4321), 1308 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4321 transitions. [2021-06-12 20:05:30,990 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4321 transitions. Word has length 24 [2021-06-12 20:05:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:30,990 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4321 transitions. [2021-06-12 20:05:30,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4321 transitions. [2021-06-12 20:05:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:30,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:30,992 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:31,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3680 [2021-06-12 20:05:31,192 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 491662709, now seen corresponding path program 451 times [2021-06-12 20:05:31,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:31,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910494754] [2021-06-12 20:05:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:31,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:31,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910494754] [2021-06-12 20:05:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910494754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160887030] [2021-06-12 20:05:31,252 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 20:05:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:31,319 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 23 treesize of output 17 [2021-06-12 20:05:31,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:31,321 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 22 treesize of output 16 [2021-06-12 20:05:31,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:31,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:31,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:05:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160887030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:31,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 20:05:31,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309848666] [2021-06-12 20:05:31,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:05:31,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:31,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:05:31,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:31,370 INFO L87 Difference]: Start difference. First operand 1309 states and 4321 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20:05:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:31,507 INFO L93 Difference]: Finished difference Result 1524 states and 4956 transitions. [2021-06-12 20:05:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 25 [2021-06-12 20:05:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:31,509 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 20:05:31,509 INFO L226 Difference]: Without dead ends: 1524 [2021-06-12 20:05:31,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-06-12 20:05:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1329. [2021-06-12 20:05:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 3.309487951807229) internal successors, (4395), 1328 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 4395 transitions. [2021-06-12 20:05:31,523 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 4395 transitions. Word has length 25 [2021-06-12 20:05:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:31,523 INFO L482 AbstractCegarLoop]: Abstraction has 1329 states and 4395 transitions. [2021-06-12 20:05:31,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20:05:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 4395 transitions. [2021-06-12 20:05:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:31,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:31,524 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:31,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3682 [2021-06-12 20:05:31,725 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1610597509, now seen corresponding path program 452 times [2021-06-12 20:05:31,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:31,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709163078] [2021-06-12 20:05:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:31,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709163078] [2021-06-12 20:05:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709163078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318778250] [2021-06-12 20:05:31,795 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 20:05:31,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:31,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:31,862 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 23 treesize of output 17 [2021-06-12 20:05:31,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:31,864 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 22 treesize of output 16 [2021-06-12 20:05:31,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:31,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:31,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:05:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318778250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:31,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:05:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245236276] [2021-06-12 20:05:31,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:31,929 INFO L87 Difference]: Start difference. First operand 1329 states and 4395 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 20:05:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:32,109 INFO L93 Difference]: Finished difference Result 1584 states and 5136 transitions. [2021-06-12 20:05:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:32,110 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 25 [2021-06-12 20:05:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:32,112 INFO L225 Difference]: With dead ends: 1584 [2021-06-12 20:05:32,112 INFO L226 Difference]: Without dead ends: 1584 [2021-06-12 20:05:32,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-12 20:05:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1332. [2021-06-12 20:05:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3087903831705483) internal successors, (4404), 1331 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4404 transitions. [2021-06-12 20:05:32,126 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4404 transitions. Word has length 25 [2021-06-12 20:05:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:32,126 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4404 transitions. [2021-06-12 20:05:32,126 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 20:05:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4404 transitions. [2021-06-12 20:05:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:32,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:32,127 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:32,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3685,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:32,328 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 946397971, now seen corresponding path program 453 times [2021-06-12 20:05:32,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:32,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692913304] [2021-06-12 20:05:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:32,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692913304] [2021-06-12 20:05:32,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692913304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020432453] [2021-06-12 20:05:32,389 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 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 20:05:32,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:32,457 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 23 treesize of output 17 [2021-06-12 20:05:32,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:32,459 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 22 treesize of output 16 [2021-06-12 20:05:32,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:32,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:32,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:05:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:32,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020432453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:32,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:32,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842678159] [2021-06-12 20:05:32,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:32,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:32,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:32,534 INFO L87 Difference]: Start difference. First operand 1332 states and 4404 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 20:05:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:32,835 INFO L93 Difference]: Finished difference Result 1623 states and 5223 transitions. [2021-06-12 20:05:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:32,835 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 25 [2021-06-12 20:05:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:32,837 INFO L225 Difference]: With dead ends: 1623 [2021-06-12 20:05:32,837 INFO L226 Difference]: Without dead ends: 1623 [2021-06-12 20:05:32,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-12 20:05:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1333. [2021-06-12 20:05:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.31006006006006) internal successors, (4409), 1332 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4409 transitions. [2021-06-12 20:05:32,851 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4409 transitions. Word has length 25 [2021-06-12 20:05:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:32,852 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4409 transitions. [2021-06-12 20:05:32,852 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 20:05:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4409 transitions. [2021-06-12 20:05:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:32,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:32,853 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:33,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3688 [2021-06-12 20:05:33,053 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash -540076451, now seen corresponding path program 454 times [2021-06-12 20:05:33,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:33,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400988854] [2021-06-12 20:05:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:33,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400988854] [2021-06-12 20:05:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400988854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343021399] [2021-06-12 20:05:33,118 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 20:05:33,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:33,185 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 23 treesize of output 17 [2021-06-12 20:05:33,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:33,187 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 22 treesize of output 16 [2021-06-12 20:05:33,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:33,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:33,196 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:05:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:33,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343021399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:33,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819683197] [2021-06-12 20:05:33,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:33,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:33,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:33,261 INFO L87 Difference]: Start difference. First operand 1333 states and 4409 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 20:05:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:33,476 INFO L93 Difference]: Finished difference Result 1536 states and 4986 transitions. [2021-06-12 20:05:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:33,476 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 25 [2021-06-12 20:05:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:33,478 INFO L225 Difference]: With dead ends: 1536 [2021-06-12 20:05:33,478 INFO L226 Difference]: Without dead ends: 1530 [2021-06-12 20:05:33,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-06-12 20:05:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1330. [2021-06-12 20:05:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.310007524454477) internal successors, (4399), 1329 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4399 transitions. [2021-06-12 20:05:33,492 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4399 transitions. Word has length 25 [2021-06-12 20:05:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:33,492 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4399 transitions. [2021-06-12 20:05:33,492 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 20:05:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4399 transitions. [2021-06-12 20:05:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:33,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:33,493 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:33,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-12 20:05:33,694 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash 925079125, now seen corresponding path program 455 times [2021-06-12 20:05:33,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:33,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084562723] [2021-06-12 20:05:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:33,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:33,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084562723] [2021-06-12 20:05:33,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084562723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009639608] [2021-06-12 20:05:33,758 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 20:05:33,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:33,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:33,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:33,844 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 23 treesize of output 17 [2021-06-12 20:05:33,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:33,846 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 22 treesize of output 16 [2021-06-12 20:05:33,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:33,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:33,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:05:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:33,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009639608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:33,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 20:05:33,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530137570] [2021-06-12 20:05:33,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:05:33,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:05:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:33,894 INFO L87 Difference]: Start difference. First operand 1330 states and 4399 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20:05:34,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:34,042 INFO L93 Difference]: Finished difference Result 1422 states and 4674 transitions. [2021-06-12 20:05:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:34,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 25 [2021-06-12 20:05:34,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:34,043 INFO L225 Difference]: With dead ends: 1422 [2021-06-12 20:05:34,044 INFO L226 Difference]: Without dead ends: 1422 [2021-06-12 20:05:34,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:05:34,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-12 20:05:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1336. [2021-06-12 20:05:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.308614232209738) internal successors, (4417), 1335 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4417 transitions. [2021-06-12 20:05:34,056 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4417 transitions. Word has length 25 [2021-06-12 20:05:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:34,056 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4417 transitions. [2021-06-12 20:05:34,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20:05:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4417 transitions. [2021-06-12 20:05:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:34,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:34,058 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:34,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:34,261 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash -812892691, now seen corresponding path program 456 times [2021-06-12 20:05:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:34,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768975263] [2021-06-12 20:05:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:34,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:34,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768975263] [2021-06-12 20:05:34,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768975263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124856210] [2021-06-12 20:05:34,327 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 20:05:34,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:34,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:34,400 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 23 treesize of output 17 [2021-06-12 20:05:34,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:34,402 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 22 treesize of output 16 [2021-06-12 20:05:34,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:34,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:34,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:05:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124856210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:34,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:05:34,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199777229] [2021-06-12 20:05:34,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:34,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:34,474 INFO L87 Difference]: Start difference. First operand 1336 states and 4417 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 20:05:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:34,637 INFO L93 Difference]: Finished difference Result 1518 states and 4932 transitions. [2021-06-12 20:05:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:34,637 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 25 [2021-06-12 20:05:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:34,639 INFO L225 Difference]: With dead ends: 1518 [2021-06-12 20:05:34,639 INFO L226 Difference]: Without dead ends: 1518 [2021-06-12 20:05:34,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-12 20:05:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1337. [2021-06-12 20:05:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.309880239520958) internal successors, (4422), 1336 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4422 transitions. [2021-06-12 20:05:34,661 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4422 transitions. Word has length 25 [2021-06-12 20:05:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:34,661 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4422 transitions. [2021-06-12 20:05:34,661 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 20:05:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4422 transitions. [2021-06-12 20:05:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:34,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:34,663 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:34,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3699 [2021-06-12 20:05:34,863 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1995600183, now seen corresponding path program 457 times [2021-06-12 20:05:34,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:34,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611192978] [2021-06-12 20:05:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:34,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:34,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611192978] [2021-06-12 20:05:34,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611192978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933496058] [2021-06-12 20:05:34,924 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 20:05:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:34,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:34,996 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 23 treesize of output 17 [2021-06-12 20:05:34,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:34,998 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 22 treesize of output 16 [2021-06-12 20:05:34,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:35,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:35,011 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:05:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:35,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933496058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:35,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:05:35,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110966677] [2021-06-12 20:05:35,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:35,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:35,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:35,067 INFO L87 Difference]: Start difference. First operand 1337 states and 4422 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 20:05:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:35,232 INFO L93 Difference]: Finished difference Result 1431 states and 4695 transitions. [2021-06-12 20:05:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:35,232 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 25 [2021-06-12 20:05:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:35,234 INFO L225 Difference]: With dead ends: 1431 [2021-06-12 20:05:35,234 INFO L226 Difference]: Without dead ends: 1425 [2021-06-12 20:05:35,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-12 20:05:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1333. [2021-06-12 20:05:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.309309309309309) internal successors, (4408), 1332 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4408 transitions. [2021-06-12 20:05:35,247 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4408 transitions. Word has length 25 [2021-06-12 20:05:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:35,247 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4408 transitions. [2021-06-12 20:05:35,247 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 20:05:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4408 transitions. [2021-06-12 20:05:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:35,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:35,248 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:35,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-12 20:05:35,449 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1350385547, now seen corresponding path program 458 times [2021-06-12 20:05:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:35,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102403001] [2021-06-12 20:05:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:35,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102403001] [2021-06-12 20:05:35,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102403001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478648843] [2021-06-12 20:05:35,522 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 20:05:35,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:35,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:35,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:35,595 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 22 treesize of output 16 [2021-06-12 20:05:35,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:35,601 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 23 treesize of output 17 [2021-06-12 20:05:35,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:35,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:35,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:35,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-06-12 20:05:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:35,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478648843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:35,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:05:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564267652] [2021-06-12 20:05:35,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:35,674 INFO L87 Difference]: Start difference. First operand 1333 states and 4408 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 20:05:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:35,913 INFO L93 Difference]: Finished difference Result 1464 states and 4770 transitions. [2021-06-12 20:05:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:35,913 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 25 [2021-06-12 20:05:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:35,915 INFO L225 Difference]: With dead ends: 1464 [2021-06-12 20:05:35,915 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 20:05:35,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 20:05:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1337. [2021-06-12 20:05:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.312125748502994) internal successors, (4425), 1336 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4425 transitions. [2021-06-12 20:05:35,929 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4425 transitions. Word has length 25 [2021-06-12 20:05:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:35,929 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4425 transitions. [2021-06-12 20:05:35,929 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 20:05:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4425 transitions. [2021-06-12 20:05:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:35,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:35,931 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:36,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3716,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:36,131 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:36,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1458107327, now seen corresponding path program 459 times [2021-06-12 20:05:36,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:36,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842034210] [2021-06-12 20:05:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842034210] [2021-06-12 20:05:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842034210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987977384] [2021-06-12 20:05:36,203 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 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 20:05:36,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:05:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:36,276 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 23 treesize of output 17 [2021-06-12 20:05:36,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:36,278 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 22 treesize of output 16 [2021-06-12 20:05:36,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:36,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:36,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 20:05:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:36,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987977384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:36,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:05:36,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842654044] [2021-06-12 20:05:36,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:36,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:36,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:36,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:36,347 INFO L87 Difference]: Start difference. First operand 1337 states and 4425 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 20:05:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:36,616 INFO L93 Difference]: Finished difference Result 1470 states and 4779 transitions. [2021-06-12 20:05:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:05:36,616 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 25 [2021-06-12 20:05:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:36,618 INFO L225 Difference]: With dead ends: 1470 [2021-06-12 20:05:36,618 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 20:05:36,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 20:05:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2021-06-12 20:05:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.310861423220974) internal successors, (4420), 1335 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4420 transitions. [2021-06-12 20:05:36,632 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4420 transitions. Word has length 25 [2021-06-12 20:05:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:36,632 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4420 transitions. [2021-06-12 20:05:36,632 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 20:05:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4420 transitions. [2021-06-12 20:05:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:36,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:36,642 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:36,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3721,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:36,843 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash 397329237, now seen corresponding path program 460 times [2021-06-12 20:05:36,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:36,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076063073] [2021-06-12 20:05:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:36,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:36,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076063073] [2021-06-12 20:05:36,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076063073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923104655] [2021-06-12 20:05:36,914 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 20:05:36,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:36,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:36,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:36,988 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 23 treesize of output 17 [2021-06-12 20:05:36,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:05:36,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:05:36,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:37,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:37,005 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 20:05:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:37,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923104655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:37,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:05:37,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514223750] [2021-06-12 20:05:37,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:05:37,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:05:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:05:37,055 INFO L87 Difference]: Start difference. First operand 1336 states and 4420 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 20:05:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:37,300 INFO L93 Difference]: Finished difference Result 1392 states and 4575 transitions. [2021-06-12 20:05:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:37,301 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 25 [2021-06-12 20:05:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:37,302 INFO L225 Difference]: With dead ends: 1392 [2021-06-12 20:05:37,302 INFO L226 Difference]: Without dead ends: 1380 [2021-06-12 20:05:37,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-12 20:05:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1331. [2021-06-12 20:05:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3105263157894735) internal successors, (4403), 1330 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4403 transitions. [2021-06-12 20:05:37,315 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4403 transitions. Word has length 25 [2021-06-12 20:05:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:37,315 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4403 transitions. [2021-06-12 20:05:37,315 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 20:05:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4403 transitions. [2021-06-12 20:05:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:37,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:37,316 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:37,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3727 [2021-06-12 20:05:37,517 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1041311475, now seen corresponding path program 461 times [2021-06-12 20:05:37,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:37,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414701813] [2021-06-12 20:05:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:37,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:37,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414701813] [2021-06-12 20:05:37,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414701813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095912857] [2021-06-12 20:05:37,597 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 20:05:37,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:37,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:37,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:37,682 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 17 treesize of output 13 [2021-06-12 20:05:37,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:37,685 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 16 treesize of output 12 [2021-06-12 20:05:37,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:37,702 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:05:37,703 INFO 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 20:05:37,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-12 20:05:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:37,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095912857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:37,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:37,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500852546] [2021-06-12 20:05:37,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:37,783 INFO L87 Difference]: Start difference. First operand 1331 states and 4403 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:37,965 INFO L93 Difference]: Finished difference Result 1488 states and 4774 transitions. [2021-06-12 20:05:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:05:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:37,967 INFO L225 Difference]: With dead ends: 1488 [2021-06-12 20:05:37,967 INFO L226 Difference]: Without dead ends: 1446 [2021-06-12 20:05:37,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-06-12 20:05:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1323. [2021-06-12 20:05:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.3124054462934946) internal successors, (4379), 1322 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4379 transitions. [2021-06-12 20:05:37,980 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4379 transitions. Word has length 25 [2021-06-12 20:05:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:37,980 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4379 transitions. [2021-06-12 20:05:37,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4379 transitions. [2021-06-12 20:05:37,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:37,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:37,981 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:38,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3731,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:38,182 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:38,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1567392057, now seen corresponding path program 462 times [2021-06-12 20:05:38,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:38,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871799890] [2021-06-12 20:05:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:38,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871799890] [2021-06-12 20:05:38,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871799890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748400299] [2021-06-12 20:05:38,260 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 20:05:38,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:38,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,348 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 16 treesize of output 12 [2021-06-12 20:05:38,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,350 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 17 treesize of output 13 [2021-06-12 20:05:38,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,368 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:05:38,370 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 20:05:38,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-12 20:05:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:38,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748400299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:38,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:38,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056164096] [2021-06-12 20:05:38,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:38,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:38,428 INFO L87 Difference]: Start difference. First operand 1323 states and 4379 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 20:05:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:38,656 INFO L93 Difference]: Finished difference Result 1454 states and 4701 transitions. [2021-06-12 20:05:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:38,656 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 25 [2021-06-12 20:05:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:38,658 INFO L225 Difference]: With dead ends: 1454 [2021-06-12 20:05:38,658 INFO L226 Difference]: Without dead ends: 1442 [2021-06-12 20:05:38,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-12 20:05:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1321. [2021-06-12 20:05:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.3136363636363635) internal successors, (4374), 1320 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4374 transitions. [2021-06-12 20:05:38,670 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4374 transitions. Word has length 25 [2021-06-12 20:05:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:38,670 INFO L482 AbstractCegarLoop]: Abstraction has 1321 states and 4374 transitions. [2021-06-12 20:05:38,671 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 20:05:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4374 transitions. [2021-06-12 20:05:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:38,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:38,672 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:38,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3737,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:38,872 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:38,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1467144085, now seen corresponding path program 463 times [2021-06-12 20:05:38,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:38,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282577311] [2021-06-12 20:05:38,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:38,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282577311] [2021-06-12 20:05:38,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282577311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432707332] [2021-06-12 20:05:38,953 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 20:05:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:39,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,055 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 16 treesize of output 12 [2021-06-12 20:05:39,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,057 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 17 treesize of output 13 [2021-06-12 20:05:39,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,080 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.4 percent of original size [2021-06-12 20:05:39,081 INFO 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 20:05:39,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:26 [2021-06-12 20:05:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432707332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:39,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423924132] [2021-06-12 20:05:39,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:39,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:39,119 INFO L87 Difference]: Start difference. First operand 1321 states and 4374 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 20:05:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:39,381 INFO L93 Difference]: Finished difference Result 1426 states and 4615 transitions. [2021-06-12 20:05:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:39,382 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 25 [2021-06-12 20:05:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:39,383 INFO L225 Difference]: With dead ends: 1426 [2021-06-12 20:05:39,383 INFO L226 Difference]: Without dead ends: 1412 [2021-06-12 20:05:39,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-06-12 20:05:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1343. [2021-06-12 20:05:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.298807749627422) internal successors, (4427), 1342 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4427 transitions. [2021-06-12 20:05:39,397 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4427 transitions. Word has length 25 [2021-06-12 20:05:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:39,397 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4427 transitions. [2021-06-12 20:05:39,397 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 20:05:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4427 transitions. [2021-06-12 20:05:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:39,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:39,398 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:39,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3744 [2021-06-12 20:05:39,599 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash -270827731, now seen corresponding path program 464 times [2021-06-12 20:05:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:39,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819355189] [2021-06-12 20:05:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:39,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:39,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819355189] [2021-06-12 20:05:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819355189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348798318] [2021-06-12 20:05:39,680 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 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 20:05:39,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:39,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:39,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,792 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 20:05:39,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,794 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 16 treesize of output 12 [2021-06-12 20:05:39,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,816 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.4 percent of original size [2021-06-12 20:05:39,818 INFO 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 20:05:39,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:26 [2021-06-12 20:05:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348798318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:39,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:39,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105874295] [2021-06-12 20:05:39,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:39,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:39,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:39,855 INFO L87 Difference]: Start difference. First operand 1343 states and 4427 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 20:05:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:40,066 INFO L93 Difference]: Finished difference Result 1365 states and 4489 transitions. [2021-06-12 20:05:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:40,067 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 25 [2021-06-12 20:05:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:40,068 INFO L225 Difference]: With dead ends: 1365 [2021-06-12 20:05:40,068 INFO L226 Difference]: Without dead ends: 1355 [2021-06-12 20:05:40,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-12 20:05:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1323. [2021-06-12 20:05:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.31089258698941) internal successors, (4377), 1322 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4377 transitions. [2021-06-12 20:05:40,080 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4377 transitions. Word has length 25 [2021-06-12 20:05:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:40,081 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4377 transitions. [2021-06-12 20:05:40,081 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 20:05:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4377 transitions. [2021-06-12 20:05:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:40,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:40,082 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:40,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3751,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:40,282 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 246762917, now seen corresponding path program 465 times [2021-06-12 20:05:40,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:40,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272408540] [2021-06-12 20:05:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:40,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272408540] [2021-06-12 20:05:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272408540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761509460] [2021-06-12 20:05:40,363 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 20:05:40,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:40,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:40,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:40,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:40,453 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 16 treesize of output 12 [2021-06-12 20:05:40,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,455 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 17 treesize of output 13 [2021-06-12 20:05:40,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,473 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:05:40,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:40,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:28 [2021-06-12 20:05:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:40,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761509460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:40,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:40,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202489007] [2021-06-12 20:05:40,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:40,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:40,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:40,513 INFO L87 Difference]: Start difference. First operand 1323 states and 4377 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 20:05:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:40,874 INFO L93 Difference]: Finished difference Result 1471 states and 4717 transitions. [2021-06-12 20:05:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:40,874 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 25 [2021-06-12 20:05:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:40,876 INFO L225 Difference]: With dead ends: 1471 [2021-06-12 20:05:40,876 INFO L226 Difference]: Without dead ends: 1445 [2021-06-12 20:05:40,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-06-12 20:05:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1339. [2021-06-12 20:05:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.305680119581465) internal successors, (4423), 1338 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4423 transitions. [2021-06-12 20:05:40,890 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4423 transitions. Word has length 25 [2021-06-12 20:05:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:40,890 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4423 transitions. [2021-06-12 20:05:40,890 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 20:05:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4423 transitions. [2021-06-12 20:05:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:40,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:40,892 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:41,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3758 [2021-06-12 20:05:41,108 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash -290729939, now seen corresponding path program 466 times [2021-06-12 20:05:41,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:41,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000443436] [2021-06-12 20:05:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:41,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:41,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000443436] [2021-06-12 20:05:41,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000443436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11444779] [2021-06-12 20:05:41,193 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 20:05:41,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:41,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:41,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:41,286 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 16 treesize of output 12 [2021-06-12 20:05:41,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,288 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 17 treesize of output 13 [2021-06-12 20:05:41,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:41,309 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:05:41,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:41,310 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:28 [2021-06-12 20:05:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:41,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11444779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:41,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354826333] [2021-06-12 20:05:41,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:41,365 INFO L87 Difference]: Start difference. First operand 1339 states and 4423 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 20:05:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:41,633 INFO L93 Difference]: Finished difference Result 1369 states and 4497 transitions. [2021-06-12 20:05:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:41,633 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 25 [2021-06-12 20:05:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:41,641 INFO L225 Difference]: With dead ends: 1369 [2021-06-12 20:05:41,641 INFO L226 Difference]: Without dead ends: 1351 [2021-06-12 20:05:41,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-06-12 20:05:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1319. [2021-06-12 20:05:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.315629742033384) internal successors, (4370), 1318 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4370 transitions. [2021-06-12 20:05:41,653 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4370 transitions. Word has length 25 [2021-06-12 20:05:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:41,653 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 4370 transitions. [2021-06-12 20:05:41,653 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 20:05:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4370 transitions. [2021-06-12 20:05:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:41,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:41,655 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:41,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3765,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:41,855 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1785858563, now seen corresponding path program 467 times [2021-06-12 20:05:41,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:41,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882597883] [2021-06-12 20:05:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:41,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:41,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882597883] [2021-06-12 20:05:41,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882597883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044510174] [2021-06-12 20:05:41,921 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 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 20:05:41,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:05:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:42,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,015 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 16 treesize of output 12 [2021-06-12 20:05:42,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,018 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 15 treesize of output 11 [2021-06-12 20:05:42,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,021 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 20:05:42,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,024 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 16 treesize of output 12 [2021-06-12 20:05:42,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,065 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:42,067 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 20:05:42,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:42,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044510174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:42,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:42,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:42,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458072339] [2021-06-12 20:05:42,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:42,176 INFO L87 Difference]: Start difference. First operand 1319 states and 4370 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 20:05:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:42,364 INFO L93 Difference]: Finished difference Result 2077 states and 6677 transitions. [2021-06-12 20:05:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:42,364 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 25 [2021-06-12 20:05:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:42,367 INFO L225 Difference]: With dead ends: 2077 [2021-06-12 20:05:42,367 INFO L226 Difference]: Without dead ends: 2077 [2021-06-12 20:05:42,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-06-12 20:05:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1334. [2021-06-12 20:05:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.3143285821455364) internal successors, (4418), 1333 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4418 transitions. [2021-06-12 20:05:42,384 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4418 transitions. Word has length 25 [2021-06-12 20:05:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:42,384 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4418 transitions. [2021-06-12 20:05:42,384 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 20:05:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4418 transitions. [2021-06-12 20:05:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:42,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:42,386 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:42,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3770 [2021-06-12 20:05:42,586 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -316401655, now seen corresponding path program 468 times [2021-06-12 20:05:42,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:42,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547670115] [2021-06-12 20:05:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:42,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:42,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547670115] [2021-06-12 20:05:42,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547670115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:42,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940053565] [2021-06-12 20:05:42,651 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 20:05:42,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:42,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:05:42,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,747 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 15 treesize of output 11 [2021-06-12 20:05:42,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,750 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 17 treesize of output 13 [2021-06-12 20:05:42,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,753 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 16 treesize of output 12 [2021-06-12 20:05:42,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:42,755 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 16 treesize of output 12 [2021-06-12 20:05:42,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:42,797 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:42,799 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 20:05:42,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:42,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940053565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:42,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:42,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:42,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661422910] [2021-06-12 20:05:42,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:42,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:42,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:42,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:42,949 INFO L87 Difference]: Start difference. First operand 1334 states and 4418 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 20:05:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:43,152 INFO L93 Difference]: Finished difference Result 1965 states and 6336 transitions. [2021-06-12 20:05:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:43,153 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 25 [2021-06-12 20:05:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:43,155 INFO L225 Difference]: With dead ends: 1965 [2021-06-12 20:05:43,155 INFO L226 Difference]: Without dead ends: 1965 [2021-06-12 20:05:43,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-12 20:05:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1349. [2021-06-12 20:05:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3130563798219583) internal successors, (4466), 1348 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4466 transitions. [2021-06-12 20:05:43,171 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4466 transitions. Word has length 25 [2021-06-12 20:05:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:43,171 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4466 transitions. [2021-06-12 20:05:43,171 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 20:05:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4466 transitions. [2021-06-12 20:05:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:43,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:43,173 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:43,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3783,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:43,373 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2054373471, now seen corresponding path program 469 times [2021-06-12 20:05:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:43,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849711009] [2021-06-12 20:05:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:43,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849711009] [2021-06-12 20:05:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849711009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781258892] [2021-06-12 20:05:43,437 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 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 20:05:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,535 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 17 treesize of output 13 [2021-06-12 20:05:43,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,538 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 15 treesize of output 11 [2021-06-12 20:05:43,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:43,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:43,544 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 16 treesize of output 12 [2021-06-12 20:05:43,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:43,592 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:43,594 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 20:05:43,595 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:43,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781258892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:43,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:43,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:43,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222815165] [2021-06-12 20:05:43,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:43,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:43,752 INFO L87 Difference]: Start difference. First operand 1349 states and 4466 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:44,206 INFO L93 Difference]: Finished difference Result 2079 states and 6636 transitions. [2021-06-12 20:05:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:05:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:05:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:44,209 INFO L225 Difference]: With dead ends: 2079 [2021-06-12 20:05:44,209 INFO L226 Difference]: Without dead ends: 2079 [2021-06-12 20:05:44,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:05:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-06-12 20:05:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1354. [2021-06-12 20:05:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.3200295639320028) internal successors, (4492), 1353 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4492 transitions. [2021-06-12 20:05:44,227 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4492 transitions. Word has length 25 [2021-06-12 20:05:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:44,227 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 4492 transitions. [2021-06-12 20:05:44,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4492 transitions. [2021-06-12 20:05:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:44,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:44,229 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:44,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3796,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:44,445 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash 754119403, now seen corresponding path program 470 times [2021-06-12 20:05:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:44,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616889868] [2021-06-12 20:05:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:44,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:44,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616889868] [2021-06-12 20:05:44,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616889868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:44,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803538075] [2021-06-12 20:05:44,515 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 20:05:44,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:44,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:44,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:44,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,606 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 16 treesize of output 12 [2021-06-12 20:05:44,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:44,609 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 16 treesize of output 12 [2021-06-12 20:05:44,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:44,649 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:44,651 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 20:05:44,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:44,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803538075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:44,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:44,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:44,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77997450] [2021-06-12 20:05:44,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:44,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:44,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:44,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:44,805 INFO L87 Difference]: Start difference. First operand 1354 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:45,083 INFO L93 Difference]: Finished difference Result 1983 states and 6351 transitions. [2021-06-12 20:05:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:05:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:45,086 INFO L225 Difference]: With dead ends: 1983 [2021-06-12 20:05:45,086 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 20:05:45,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 20:05:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1328. [2021-06-12 20:05:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.321024868123587) internal successors, (4407), 1327 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4407 transitions. [2021-06-12 20:05:45,102 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4407 transitions. Word has length 25 [2021-06-12 20:05:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:45,102 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4407 transitions. [2021-06-12 20:05:45,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4407 transitions. [2021-06-12 20:05:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:45,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:45,103 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:45,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3818 [2021-06-12 20:05:45,304 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 826159441, now seen corresponding path program 471 times [2021-06-12 20:05:45,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:45,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308498126] [2021-06-12 20:05:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:45,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:45,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308498126] [2021-06-12 20:05:45,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308498126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:45,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379632919] [2021-06-12 20:05:45,397 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 20:05:45,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:45,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:45,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:45,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:45,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,473 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 17 treesize of output 13 [2021-06-12 20:05:45,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:45,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,476 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 18 treesize of output 14 [2021-06-12 20:05:45,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:45,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:45,479 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 18 treesize of output 14 [2021-06-12 20:05:45,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:45,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:45,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:45,516 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:05:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379632919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:45,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:45,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:45,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777521139] [2021-06-12 20:05:45,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:45,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:45,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:45,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:45,637 INFO L87 Difference]: Start difference. First operand 1328 states and 4407 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 20:05:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:46,199 INFO L93 Difference]: Finished difference Result 1743 states and 5552 transitions. [2021-06-12 20:05:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:46,199 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 25 [2021-06-12 20:05:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:46,201 INFO L225 Difference]: With dead ends: 1743 [2021-06-12 20:05:46,202 INFO L226 Difference]: Without dead ends: 1729 [2021-06-12 20:05:46,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-12 20:05:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1348. [2021-06-12 20:05:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.307349665924276) internal successors, (4455), 1347 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4455 transitions. [2021-06-12 20:05:46,217 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4455 transitions. Word has length 25 [2021-06-12 20:05:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:46,217 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4455 transitions. [2021-06-12 20:05:46,217 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 20:05:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4455 transitions. [2021-06-12 20:05:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:46,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:46,218 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:46,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3841,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:46,419 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:46,419 INFO L82 PathProgramCache]: Analyzing trace with hash -911812375, now seen corresponding path program 472 times [2021-06-12 20:05:46,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:46,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976769596] [2021-06-12 20:05:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:46,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:46,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976769596] [2021-06-12 20:05:46,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976769596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:46,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552596508] [2021-06-12 20:05:46,505 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 20:05:46,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:46,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:46,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,579 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 17 treesize of output 13 [2021-06-12 20:05:46,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,582 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 18 treesize of output 14 [2021-06-12 20:05:46,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,585 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 18 treesize of output 14 [2021-06-12 20:05:46,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:46,588 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 17 treesize of output 13 [2021-06-12 20:05:46,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:46,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:46,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:46,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:05:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552596508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:46,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:46,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:46,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817649524] [2021-06-12 20:05:46,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:46,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:46,744 INFO L87 Difference]: Start difference. First operand 1348 states and 4455 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 20:05:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:47,215 INFO L93 Difference]: Finished difference Result 1682 states and 5426 transitions. [2021-06-12 20:05:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:05:47,215 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 25 [2021-06-12 20:05:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:47,217 INFO L225 Difference]: With dead ends: 1682 [2021-06-12 20:05:47,217 INFO L226 Difference]: Without dead ends: 1670 [2021-06-12 20:05:47,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-12 20:05:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1326. [2021-06-12 20:05:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.3230188679245285) internal successors, (4403), 1325 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4403 transitions. [2021-06-12 20:05:47,231 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4403 transitions. Word has length 25 [2021-06-12 20:05:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:47,231 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 4403 transitions. [2021-06-12 20:05:47,232 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 20:05:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4403 transitions. [2021-06-12 20:05:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:47,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:47,233 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:47,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3849,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:47,433 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:47,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1588690307, now seen corresponding path program 473 times [2021-06-12 20:05:47,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:47,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980056409] [2021-06-12 20:05:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:05:47,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:47,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980056409] [2021-06-12 20:05:47,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980056409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:47,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729688402] [2021-06-12 20:05:47,496 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 20:05:47,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:47,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:47,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:47,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:47,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:47,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,586 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 16 treesize of output 12 [2021-06-12 20:05:47,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:47,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:47,630 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:47,632 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 20:05:47,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:05:47,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729688402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:47,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:47,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153252597] [2021-06-12 20:05:47,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:47,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:47,743 INFO L87 Difference]: Start difference. First operand 1326 states and 4403 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20:05:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:47,950 INFO L93 Difference]: Finished difference Result 1959 states and 6311 transitions. [2021-06-12 20:05:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:47,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 25 [2021-06-12 20:05:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:47,952 INFO L225 Difference]: With dead ends: 1959 [2021-06-12 20:05:47,952 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 20:05:47,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 20:05:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1317. [2021-06-12 20:05:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.317629179331307) internal successors, (4366), 1316 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4366 transitions. [2021-06-12 20:05:47,976 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4366 transitions. Word has length 25 [2021-06-12 20:05:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:47,976 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 4366 transitions. [2021-06-12 20:05:47,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20:05:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4366 transitions. [2021-06-12 20:05:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:47,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:47,977 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:48,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-06-12 20:05:48,178 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash -93446007, now seen corresponding path program 474 times [2021-06-12 20:05:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:48,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859546908] [2021-06-12 20:05:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:48,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859546908] [2021-06-12 20:05:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859546908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734115561] [2021-06-12 20:05:48,247 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 20:05:48,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:05:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:48,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,332 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 20:05:48,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,335 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 16 treesize of output 12 [2021-06-12 20:05:48,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,338 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 16 treesize of output 12 [2021-06-12 20:05:48,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:48,340 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 15 treesize of output 11 [2021-06-12 20:05:48,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:48,381 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:48,383 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 20:05:48,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734115561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:48,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:48,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:48,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434406610] [2021-06-12 20:05:48,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:48,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:48,525 INFO L87 Difference]: Start difference. First operand 1317 states and 4366 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:05:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:48,719 INFO L93 Difference]: Finished difference Result 1861 states and 6005 transitions. [2021-06-12 20:05:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 25 [2021-06-12 20:05:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:48,721 INFO L225 Difference]: With dead ends: 1861 [2021-06-12 20:05:48,722 INFO L226 Difference]: Without dead ends: 1861 [2021-06-12 20:05:48,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-12 20:05:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1330. [2021-06-12 20:05:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.3197893152746425) internal successors, (4412), 1329 states have internal predecessors, (4412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4412 transitions. [2021-06-12 20:05:48,737 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4412 transitions. Word has length 25 [2021-06-12 20:05:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:48,737 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4412 transitions. [2021-06-12 20:05:48,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:05:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4412 transitions. [2021-06-12 20:05:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:48,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:48,739 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:48,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3870,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:48,939 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 330625903, now seen corresponding path program 475 times [2021-06-12 20:05:48,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:48,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547018455] [2021-06-12 20:05:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:49,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547018455] [2021-06-12 20:05:49,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547018455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018610140] [2021-06-12 20:05:49,038 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 20:05:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:49,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,111 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 18 treesize of output 14 [2021-06-12 20:05:49,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,123 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 17 treesize of output 13 [2021-06-12 20:05:49,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:49,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:49,129 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 20:05:49,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:49,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:49,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:49,165 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:05:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:49,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018610140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:49,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:49,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482785207] [2021-06-12 20:05:49,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:49,374 INFO L87 Difference]: Start difference. First operand 1330 states and 4412 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:49,652 INFO L93 Difference]: Finished difference Result 1600 states and 5214 transitions. [2021-06-12 20:05:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:05:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:49,655 INFO L225 Difference]: With dead ends: 1600 [2021-06-12 20:05:49,655 INFO L226 Difference]: Without dead ends: 1572 [2021-06-12 20:05:49,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:05:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-12 20:05:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1324. [2021-06-12 20:05:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.315948601662887) internal successors, (4387), 1323 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4387 transitions. [2021-06-12 20:05:49,668 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4387 transitions. Word has length 25 [2021-06-12 20:05:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:49,668 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4387 transitions. [2021-06-12 20:05:49,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4387 transitions. [2021-06-12 20:05:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:49,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:49,670 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:49,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3881 [2021-06-12 20:05:49,870 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1787306931, now seen corresponding path program 476 times [2021-06-12 20:05:49,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:49,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944225339] [2021-06-12 20:05:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:49,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:49,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944225339] [2021-06-12 20:05:49,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944225339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:49,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61681342] [2021-06-12 20:05:49,944 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 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 20:05:49,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:49,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:50,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,033 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 15 treesize of output 11 [2021-06-12 20:05:50,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,036 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 16 treesize of output 12 [2021-06-12 20:05:50,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,039 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 16 treesize of output 12 [2021-06-12 20:05:50,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,041 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 17 treesize of output 13 [2021-06-12 20:05:50,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,083 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:50,085 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 20:05:50,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:50,222 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1657], 1=[o_0, v_prenex_1656]} [2021-06-12 20:05:50,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:50,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,227 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 17 treesize of output 13 [2021-06-12 20:05:50,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,271 INFO L628 ElimStorePlain]: treesize reduction 72, result has 44.2 percent of original size [2021-06-12 20:05:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:05:50,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:50,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,293 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 9 treesize of output 5 [2021-06-12 20:05:50,294 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:50,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:50,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2021-06-12 20:05:50,312 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:50,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:50,328 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 20:05:50,328 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-12 20:05:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:50,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61681342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:50,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:50,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:05:50,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169467174] [2021-06-12 20:05:50,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:05:50,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:50,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:05:50,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:50,366 INFO L87 Difference]: Start difference. First operand 1324 states and 4387 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:50,848 INFO L93 Difference]: Finished difference Result 1970 states and 6261 transitions. [2021-06-12 20:05:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:05:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:05:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:50,850 INFO L225 Difference]: With dead ends: 1970 [2021-06-12 20:05:50,850 INFO L226 Difference]: Without dead ends: 1970 [2021-06-12 20:05:50,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:05:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-06-12 20:05:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1331. [2021-06-12 20:05:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3248120300751878) internal successors, (4422), 1330 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4422 transitions. [2021-06-12 20:05:50,867 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4422 transitions. Word has length 25 [2021-06-12 20:05:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:50,867 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4422 transitions. [2021-06-12 20:05:50,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4422 transitions. [2021-06-12 20:05:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:50,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:50,869 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3888,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:51,069 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 692608013, now seen corresponding path program 477 times [2021-06-12 20:05:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578524879] [2021-06-12 20:05:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:51,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578524879] [2021-06-12 20:05:51,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578524879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:51,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38268289] [2021-06-12 20:05:51,162 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 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 20:05:51,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:51,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:51,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:51,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,250 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 20:05:51,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,253 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 15 treesize of output 11 [2021-06-12 20:05:51,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,256 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 16 treesize of output 12 [2021-06-12 20:05:51,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:51,260 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 16 treesize of output 12 [2021-06-12 20:05:51,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:51,310 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.2 percent of original size [2021-06-12 20:05:51,312 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 20:05:51,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:121, output treesize:72 [2021-06-12 20:05:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:51,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38268289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:51,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:51,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268573636] [2021-06-12 20:05:51,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:51,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:51,491 INFO L87 Difference]: Start difference. First operand 1331 states and 4422 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 20:05:52,304 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-06-12 20:05:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:52,531 INFO L93 Difference]: Finished difference Result 1806 states and 5750 transitions. [2021-06-12 20:05:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:52,531 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 25 [2021-06-12 20:05:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:52,534 INFO L225 Difference]: With dead ends: 1806 [2021-06-12 20:05:52,534 INFO L226 Difference]: Without dead ends: 1792 [2021-06-12 20:05:52,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 997.5ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:05:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-12 20:05:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1352. [2021-06-12 20:05:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.319763138415988) internal successors, (4485), 1351 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4485 transitions. [2021-06-12 20:05:52,550 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4485 transitions. Word has length 25 [2021-06-12 20:05:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:52,550 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4485 transitions. [2021-06-12 20:05:52,550 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 20:05:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4485 transitions. [2021-06-12 20:05:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:52,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:52,551 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:52,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-06-12 20:05:52,752 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash 427190191, now seen corresponding path program 478 times [2021-06-12 20:05:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:52,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431112678] [2021-06-12 20:05:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:52,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:52,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431112678] [2021-06-12 20:05:52,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431112678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:52,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654412776] [2021-06-12 20:05:52,857 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 20:05:52,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:52,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:52,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,931 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 18 treesize of output 14 [2021-06-12 20:05:52,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:52,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,938 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 20:05:52,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:52,940 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 20:05:52,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:52,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:52,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:52,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:05:53,157 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1664], 1=[o_0, v_prenex_1663]} [2021-06-12 20:05:53,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:53,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:05:53,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,212 INFO L628 ElimStorePlain]: treesize reduction 76, result has 41.1 percent of original size [2021-06-12 20:05:53,214 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 9 treesize of output 7 [2021-06-12 20:05:53,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:53,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,232 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 9 treesize of output 5 [2021-06-12 20:05:53,233 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:05:53,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:53,247 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1663 vanished before elimination [2021-06-12 20:05:53,248 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 20:05:53,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-12 20:05:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:53,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654412776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:53,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:53,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:05:53,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282688745] [2021-06-12 20:05:53,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:05:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:05:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:05:53,288 INFO L87 Difference]: Start difference. First operand 1352 states and 4485 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 20:05:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:53,557 INFO L93 Difference]: Finished difference Result 1610 states and 5263 transitions. [2021-06-12 20:05:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:05:53,557 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 25 [2021-06-12 20:05:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:53,559 INFO L225 Difference]: With dead ends: 1610 [2021-06-12 20:05:53,559 INFO L226 Difference]: Without dead ends: 1610 [2021-06-12 20:05:53,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-12 20:05:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1331. [2021-06-12 20:05:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.319548872180451) internal successors, (4415), 1330 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4415 transitions. [2021-06-12 20:05:53,574 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4415 transitions. Word has length 25 [2021-06-12 20:05:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:53,574 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4415 transitions. [2021-06-12 20:05:53,574 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 20:05:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4415 transitions. [2021-06-12 20:05:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:53,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:53,575 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:53,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:53,776 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash 427534763, now seen corresponding path program 479 times [2021-06-12 20:05:53,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:53,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583043650] [2021-06-12 20:05:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:53,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:53,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583043650] [2021-06-12 20:05:53,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583043650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:53,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885334206] [2021-06-12 20:05:53,840 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 20:05:53,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:05:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,925 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 16 treesize of output 12 [2021-06-12 20:05:53,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:53,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,931 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 15 treesize of output 11 [2021-06-12 20:05:53,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:53,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:53,975 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-12 20:05:53,977 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 20:05:53,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-12 20:05:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:54,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885334206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:54,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:54,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55389827] [2021-06-12 20:05:54,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:54,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:54,158 INFO L87 Difference]: Start difference. First operand 1331 states and 4415 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 20:05:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:54,383 INFO L93 Difference]: Finished difference Result 1807 states and 5834 transitions. [2021-06-12 20:05:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:54,383 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 25 [2021-06-12 20:05:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:54,385 INFO L225 Difference]: With dead ends: 1807 [2021-06-12 20:05:54,385 INFO L226 Difference]: Without dead ends: 1792 [2021-06-12 20:05:54,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-12 20:05:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1331. [2021-06-12 20:05:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3142857142857145) internal successors, (4408), 1330 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4408 transitions. [2021-06-12 20:05:54,400 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4408 transitions. Word has length 25 [2021-06-12 20:05:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:54,400 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4408 transitions. [2021-06-12 20:05:54,400 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 20:05:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4408 transitions. [2021-06-12 20:05:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:54,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:54,401 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:54,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3929 [2021-06-12 20:05:54,602 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1494145365, now seen corresponding path program 480 times [2021-06-12 20:05:54,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:54,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933457773] [2021-06-12 20:05:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:54,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:54,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933457773] [2021-06-12 20:05:54,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933457773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:54,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282069098] [2021-06-12 20:05:54,678 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 20:05:54,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:54,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,770 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 15 treesize of output 11 [2021-06-12 20:05:54,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,773 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 16 treesize of output 12 [2021-06-12 20:05:54,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,777 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 20:05:54,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:54,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:54,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:54,851 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:05:54,856 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 20:05:54,856 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:05:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282069098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:55,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:55,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919278789] [2021-06-12 20:05:55,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:55,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:55,103 INFO L87 Difference]: Start difference. First operand 1331 states and 4408 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:55,413 INFO L93 Difference]: Finished difference Result 1822 states and 5901 transitions. [2021-06-12 20:05:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:05:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:55,415 INFO L225 Difference]: With dead ends: 1822 [2021-06-12 20:05:55,415 INFO L226 Difference]: Without dead ends: 1822 [2021-06-12 20:05:55,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-12 20:05:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1350. [2021-06-12 20:05:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.312824314306894) internal successors, (4469), 1349 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4469 transitions. [2021-06-12 20:05:55,431 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4469 transitions. Word has length 25 [2021-06-12 20:05:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:55,431 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4469 transitions. [2021-06-12 20:05:55,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4469 transitions. [2021-06-12 20:05:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:55,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:55,433 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:55,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3952,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:55,649 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -243826451, now seen corresponding path program 481 times [2021-06-12 20:05:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:55,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126936021] [2021-06-12 20:05:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:55,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:55,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126936021] [2021-06-12 20:05:55,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126936021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:55,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679512891] [2021-06-12 20:05:55,727 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 20:05:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:55,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,832 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 15 treesize of output 11 [2021-06-12 20:05:55,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,836 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 16 treesize of output 12 [2021-06-12 20:05:55,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,839 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 17 treesize of output 13 [2021-06-12 20:05:55,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:55,842 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 16 treesize of output 12 [2021-06-12 20:05:55,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:55,914 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:05:55,919 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 20:05:55,919 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:05:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:56,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679512891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:56,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:56,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:56,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727725355] [2021-06-12 20:05:56,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:56,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:56,159 INFO L87 Difference]: Start difference. First operand 1350 states and 4469 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:56,645 INFO L93 Difference]: Finished difference Result 1912 states and 6132 transitions. [2021-06-12 20:05:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:05:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:05:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:56,648 INFO L225 Difference]: With dead ends: 1912 [2021-06-12 20:05:56,648 INFO L226 Difference]: Without dead ends: 1912 [2021-06-12 20:05:56,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:05:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-12 20:05:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1355. [2021-06-12 20:05:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3197932053175774) internal successors, (4495), 1354 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4495 transitions. [2021-06-12 20:05:56,664 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4495 transitions. Word has length 25 [2021-06-12 20:05:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:56,664 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4495 transitions. [2021-06-12 20:05:56,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4495 transitions. [2021-06-12 20:05:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:56,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:56,665 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:56,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-12 20:05:56,865 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1730300873, now seen corresponding path program 482 times [2021-06-12 20:05:56,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:56,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949777002] [2021-06-12 20:05:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:56,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949777002] [2021-06-12 20:05:56,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949777002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392169866] [2021-06-12 20:05:56,939 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 20:05:56,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:56,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:56,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:05:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:57,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,031 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 17 treesize of output 13 [2021-06-12 20:05:57,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,035 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 16 treesize of output 12 [2021-06-12 20:05:57,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:57,038 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 15 treesize of output 11 [2021-06-12 20:05:57,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:57,109 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:05:57,114 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 20:05:57,114 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:05:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:57,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392169866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:57,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:57,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:05:57,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786503480] [2021-06-12 20:05:57,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:05:57,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:57,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:05:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:05:57,362 INFO L87 Difference]: Start difference. First operand 1355 states and 4495 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:57,735 INFO L93 Difference]: Finished difference Result 1822 states and 5862 transitions. [2021-06-12 20:05:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:57,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:05:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:57,738 INFO L225 Difference]: With dead ends: 1822 [2021-06-12 20:05:57,738 INFO L226 Difference]: Without dead ends: 1798 [2021-06-12 20:05:57,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-12 20:05:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1341. [2021-06-12 20:05:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.317910447761194) internal successors, (4446), 1340 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4446 transitions. [2021-06-12 20:05:57,753 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4446 transitions. Word has length 25 [2021-06-12 20:05:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:57,753 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4446 transitions. [2021-06-12 20:05:57,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:05:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4446 transitions. [2021-06-12 20:05:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:57,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:57,754 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:57,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:57,955 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1881544623, now seen corresponding path program 483 times [2021-06-12 20:05:57,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:57,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459491118] [2021-06-12 20:05:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:58,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:58,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459491118] [2021-06-12 20:05:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459491118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:58,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333169047] [2021-06-12 20:05:58,067 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 20:05:58,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:58,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:58,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:58,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:05:58,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,172 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 17 treesize of output 13 [2021-06-12 20:05:58,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:58,176 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 18 treesize of output 14 [2021-06-12 20:05:58,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:58,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:58,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:58,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:05:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:58,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333169047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:58,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:58,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680895023] [2021-06-12 20:05:58,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:58,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:58,470 INFO L87 Difference]: Start difference. First operand 1341 states and 4446 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 20:05:58,992 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2021-06-12 20:05:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:59,126 INFO L93 Difference]: Finished difference Result 1657 states and 5348 transitions. [2021-06-12 20:05:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:05:59,126 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 25 [2021-06-12 20:05:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:59,128 INFO L225 Difference]: With dead ends: 1657 [2021-06-12 20:05:59,128 INFO L226 Difference]: Without dead ends: 1643 [2021-06-12 20:05:59,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-12 20:05:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1361. [2021-06-12 20:05:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.304411764705882) internal successors, (4494), 1360 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4494 transitions. [2021-06-12 20:05:59,143 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4494 transitions. Word has length 25 [2021-06-12 20:05:59,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:59,143 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4494 transitions. [2021-06-12 20:05:59,143 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 20:05:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4494 transitions. [2021-06-12 20:05:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:05:59,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:59,144 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:59,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:59,345 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:59,345 INFO L82 PathProgramCache]: Analyzing trace with hash 143572807, now seen corresponding path program 484 times [2021-06-12 20:05:59,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:59,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442512492] [2021-06-12 20:05:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:59,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442512492] [2021-06-12 20:05:59,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442512492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184573880] [2021-06-12 20:05:59,449 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 20:05:59,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:59,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:05:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:59,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,539 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 18 treesize of output 14 [2021-06-12 20:05:59,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,543 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 18 treesize of output 14 [2021-06-12 20:05:59,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:59,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:59,550 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 17 treesize of output 13 [2021-06-12 20:05:59,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:59,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:05:59,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:05:59,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:05:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:05:59,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184573880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:59,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:59,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:05:59,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097492957] [2021-06-12 20:05:59,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:05:59,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:59,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:05:59,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:05:59,847 INFO L87 Difference]: Start difference. First operand 1361 states and 4494 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 20:06:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:00,258 INFO L93 Difference]: Finished difference Result 1596 states and 5222 transitions. [2021-06-12 20:06:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:00,258 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 25 [2021-06-12 20:06:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:00,261 INFO L225 Difference]: With dead ends: 1596 [2021-06-12 20:06:00,261 INFO L226 Difference]: Without dead ends: 1586 [2021-06-12 20:06:00,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 479.6ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-12 20:06:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1341. [2021-06-12 20:06:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3171641791044775) internal successors, (4445), 1340 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4445 transitions. [2021-06-12 20:06:00,274 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4445 transitions. Word has length 25 [2021-06-12 20:06:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:00,274 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4445 transitions. [2021-06-12 20:06:00,274 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 20:06:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4445 transitions. [2021-06-12 20:06:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:00,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:00,276 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:00,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4001,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:00,476 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash -313330219, now seen corresponding path program 485 times [2021-06-12 20:06:00,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:00,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470615431] [2021-06-12 20:06:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:00,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:00,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470615431] [2021-06-12 20:06:00,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470615431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:00,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543873475] [2021-06-12 20:06:00,553 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 20:06:00,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:06:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:00,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,661 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 15 treesize of output 11 [2021-06-12 20:06:00,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,664 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 17 treesize of output 13 [2021-06-12 20:06:00,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,668 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 16 treesize of output 12 [2021-06-12 20:06:00,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:00,671 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 16 treesize of output 12 [2021-06-12 20:06:00,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:00,742 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:00,747 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 20:06:00,747 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:00,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543873475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:00,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:00,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:00,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801970275] [2021-06-12 20:06:00,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:00,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:00,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:00,991 INFO L87 Difference]: Start difference. First operand 1341 states and 4445 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:01,360 INFO L93 Difference]: Finished difference Result 1784 states and 5789 transitions. [2021-06-12 20:06:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:01,363 INFO L225 Difference]: With dead ends: 1784 [2021-06-12 20:06:01,363 INFO L226 Difference]: Without dead ends: 1784 [2021-06-12 20:06:01,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-12 20:06:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1338. [2021-06-12 20:06:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3118922961854897) internal successors, (4428), 1337 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4428 transitions. [2021-06-12 20:06:01,384 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4428 transitions. Word has length 25 [2021-06-12 20:06:01,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:01,384 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4428 transitions. [2021-06-12 20:06:01,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4428 transitions. [2021-06-12 20:06:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:01,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:01,385 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:01,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-12 20:06:01,586 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash -854369205, now seen corresponding path program 486 times [2021-06-12 20:06:01,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:01,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265535150] [2021-06-12 20:06:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:01,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:01,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265535150] [2021-06-12 20:06:01,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265535150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:01,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930485605] [2021-06-12 20:06:01,662 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 20:06:01,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:06:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:01,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,754 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 15 treesize of output 11 [2021-06-12 20:06:01,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,757 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 16 treesize of output 12 [2021-06-12 20:06:01,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:01,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:01,763 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 20:06:01,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:01,836 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:01,841 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 20:06:01,841 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:02,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930485605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:02,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:02,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364238302] [2021-06-12 20:06:02,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:02,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:02,139 INFO L87 Difference]: Start difference. First operand 1338 states and 4428 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 20:06:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:02,524 INFO L93 Difference]: Finished difference Result 1794 states and 5826 transitions. [2021-06-12 20:06:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:02,525 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 25 [2021-06-12 20:06:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:02,527 INFO L225 Difference]: With dead ends: 1794 [2021-06-12 20:06:02,527 INFO L226 Difference]: Without dead ends: 1794 [2021-06-12 20:06:02,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-12 20:06:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1338. [2021-06-12 20:06:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3118922961854897) internal successors, (4428), 1337 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4428 transitions. [2021-06-12 20:06:02,543 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4428 transitions. Word has length 25 [2021-06-12 20:06:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:02,543 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4428 transitions. [2021-06-12 20:06:02,543 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 20:06:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4428 transitions. [2021-06-12 20:06:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:02,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:02,544 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:02,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-12 20:06:02,744 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1471563847, now seen corresponding path program 487 times [2021-06-12 20:06:02,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:02,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602099837] [2021-06-12 20:06:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:02,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602099837] [2021-06-12 20:06:02,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602099837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446088504] [2021-06-12 20:06:02,846 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 20:06:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:02,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:02,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:02,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,939 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 17 treesize of output 13 [2021-06-12 20:06:02,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:02,942 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 18 treesize of output 14 [2021-06-12 20:06:02,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:03,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:03,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:06:03,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:03,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:03,305 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 18 treesize of output 14 [2021-06-12 20:06:03,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,365 INFO L628 ElimStorePlain]: treesize reduction 96, result has 39.6 percent of original size [2021-06-12 20:06:03,367 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 9 treesize of output 7 [2021-06-12 20:06:03,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:03,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:03,388 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:03,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1706 vanished before elimination [2021-06-12 20:06:03,389 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 20:06:03,389 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:173, output treesize:22 [2021-06-12 20:06:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446088504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:03,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:03,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:03,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356406181] [2021-06-12 20:06:03,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:03,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:03,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:03,420 INFO L87 Difference]: Start difference. First operand 1338 states and 4428 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 20:06:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:04,139 INFO L93 Difference]: Finished difference Result 1792 states and 5737 transitions. [2021-06-12 20:06:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:06:04,139 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 25 [2021-06-12 20:06:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:04,142 INFO L225 Difference]: With dead ends: 1792 [2021-06-12 20:06:04,142 INFO L226 Difference]: Without dead ends: 1778 [2021-06-12 20:06:04,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 700.6ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:06:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2021-06-12 20:06:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1366. [2021-06-12 20:06:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.3106227106227104) internal successors, (4519), 1365 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4519 transitions. [2021-06-12 20:06:04,157 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4519 transitions. Word has length 25 [2021-06-12 20:06:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:04,157 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4519 transitions. [2021-06-12 20:06:04,157 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 20:06:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4519 transitions. [2021-06-12 20:06:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:04,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:04,158 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:04,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:04,359 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1206146025, now seen corresponding path program 488 times [2021-06-12 20:06:04,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:04,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015175706] [2021-06-12 20:06:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:04,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:04,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015175706] [2021-06-12 20:06:04,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015175706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:04,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485787930] [2021-06-12 20:06:04,448 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 20:06:04,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:04,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:04,508 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 17 treesize of output 13 [2021-06-12 20:06:04,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,511 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 17 treesize of output 13 [2021-06-12 20:06:04,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,513 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 18 treesize of output 14 [2021-06-12 20:06:04,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,515 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 18 treesize of output 14 [2021-06-12 20:06:04,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:04,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:04,548 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 20:06:04,661 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 17 treesize of output 13 [2021-06-12 20:06:04,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,664 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 18 treesize of output 14 [2021-06-12 20:06:04,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,666 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 18 treesize of output 14 [2021-06-12 20:06:04,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,668 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 17 treesize of output 13 [2021-06-12 20:06:04,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:04,692 INFO L628 ElimStorePlain]: treesize reduction 59, result has 27.2 percent of original size [2021-06-12 20:06:04,692 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:04,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:04,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:22 [2021-06-12 20:06:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485787930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:04,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:04,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596332843] [2021-06-12 20:06:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:04,730 INFO L87 Difference]: Start difference. First operand 1366 states and 4519 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 20:06:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:05,068 INFO L93 Difference]: Finished difference Result 1632 states and 5345 transitions. [2021-06-12 20:06:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:05,069 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 25 [2021-06-12 20:06:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:05,071 INFO L225 Difference]: With dead ends: 1632 [2021-06-12 20:06:05,071 INFO L226 Difference]: Without dead ends: 1632 [2021-06-12 20:06:05,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-12 20:06:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1331. [2021-06-12 20:06:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.313533834586466) internal successors, (4407), 1330 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4407 transitions. [2021-06-12 20:06:05,085 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4407 transitions. Word has length 25 [2021-06-12 20:06:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:05,085 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4407 transitions. [2021-06-12 20:06:05,085 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 20:06:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4407 transitions. [2021-06-12 20:06:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:05,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:05,086 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:05,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:05,287 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1097500029, now seen corresponding path program 489 times [2021-06-12 20:06:05,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:05,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298595811] [2021-06-12 20:06:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:05,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:05,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298595811] [2021-06-12 20:06:05,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298595811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:05,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234918950] [2021-06-12 20:06:05,365 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 20:06:05,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:05,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:05,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,463 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 15 treesize of output 11 [2021-06-12 20:06:05,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,467 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 16 treesize of output 12 [2021-06-12 20:06:05,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:05,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:05,473 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 17 treesize of output 13 [2021-06-12 20:06:05,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:05,546 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:05,551 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 20:06:05,551 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:05,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234918950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:05,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:05,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635364676] [2021-06-12 20:06:05,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:05,802 INFO L87 Difference]: Start difference. First operand 1331 states and 4407 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:06,353 INFO L93 Difference]: Finished difference Result 2014 states and 6380 transitions. [2021-06-12 20:06:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:06:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:06,356 INFO L225 Difference]: With dead ends: 2014 [2021-06-12 20:06:06,356 INFO L226 Difference]: Without dead ends: 2014 [2021-06-12 20:06:06,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:06:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-12 20:06:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1341. [2021-06-12 20:06:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3276119402985076) internal successors, (4459), 1340 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4459 transitions. [2021-06-12 20:06:06,372 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4459 transitions. Word has length 25 [2021-06-12 20:06:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:06,372 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4459 transitions. [2021-06-12 20:06:06,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4459 transitions. [2021-06-12 20:06:06,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:06,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:06,373 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:06,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-06-12 20:06:06,574 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1710992845, now seen corresponding path program 490 times [2021-06-12 20:06:06,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:06,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551532446] [2021-06-12 20:06:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:06,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:06,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551532446] [2021-06-12 20:06:06,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551532446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:06,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760711897] [2021-06-12 20:06:06,650 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 20:06:06,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:06,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:06,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,742 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 16 treesize of output 12 [2021-06-12 20:06:06,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,746 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 15 treesize of output 11 [2021-06-12 20:06:06,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:06,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:06,752 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 16 treesize of output 12 [2021-06-12 20:06:06,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:06,824 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:06,829 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 20:06:06,830 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:07,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760711897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:07,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:07,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:07,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005453668] [2021-06-12 20:06:07,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:07,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:07,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:07,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:07,068 INFO L87 Difference]: Start difference. First operand 1341 states and 4459 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:07,792 INFO L93 Difference]: Finished difference Result 1870 states and 5981 transitions. [2021-06-12 20:06:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:06:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:07,794 INFO L225 Difference]: With dead ends: 1870 [2021-06-12 20:06:07,794 INFO L226 Difference]: Without dead ends: 1846 [2021-06-12 20:06:07,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:06:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-06-12 20:06:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1339. [2021-06-12 20:06:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3228699551569507) internal successors, (4446), 1338 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4446 transitions. [2021-06-12 20:06:07,809 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4446 transitions. Word has length 25 [2021-06-12 20:06:07,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:07,809 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4446 transitions. [2021-06-12 20:06:07,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4446 transitions. [2021-06-12 20:06:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:07,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:07,811 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:08,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:08,011 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash 375873873, now seen corresponding path program 491 times [2021-06-12 20:06:08,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:08,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485430458] [2021-06-12 20:06:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:08,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:08,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485430458] [2021-06-12 20:06:08,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485430458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:08,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114983654] [2021-06-12 20:06:08,090 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 20:06:08,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:08,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:08,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:08,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:08,150 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 17 treesize of output 13 [2021-06-12 20:06:08,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,152 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 17 treesize of output 13 [2021-06-12 20:06:08,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,154 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 18 treesize of output 14 [2021-06-12 20:06:08,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,157 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 18 treesize of output 14 [2021-06-12 20:06:08,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:08,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:08,182 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 20:06:08,262 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 18 treesize of output 14 [2021-06-12 20:06:08,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,265 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 20:06:08,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,267 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 20:06:08,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,270 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 18 treesize of output 14 [2021-06-12 20:06:08,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,272 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 17 treesize of output 13 [2021-06-12 20:06:08,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,275 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 20:06:08,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,277 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 18 treesize of output 14 [2021-06-12 20:06:08,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,280 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 20:06:08,281 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:08,326 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-12 20:06:08,326 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:08,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:08,327 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-12 20:06:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:08,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114983654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:08,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:08,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:08,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918362732] [2021-06-12 20:06:08,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:08,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:08,372 INFO L87 Difference]: Start difference. First operand 1339 states and 4446 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 20:06:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:08,864 INFO L93 Difference]: Finished difference Result 1889 states and 5921 transitions. [2021-06-12 20:06:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:06:08,865 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 25 [2021-06-12 20:06:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:08,867 INFO L225 Difference]: With dead ends: 1889 [2021-06-12 20:06:08,867 INFO L226 Difference]: Without dead ends: 1863 [2021-06-12 20:06:08,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-06-12 20:06:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1378. [2021-06-12 20:06:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.3122730573710966) internal successors, (4561), 1377 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4561 transitions. [2021-06-12 20:06:08,883 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4561 transitions. Word has length 25 [2021-06-12 20:06:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:08,883 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4561 transitions. [2021-06-12 20:06:08,883 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 20:06:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4561 transitions. [2021-06-12 20:06:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:08,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:08,885 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:09,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-06-12 20:06:09,085 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1362097943, now seen corresponding path program 492 times [2021-06-12 20:06:09,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:09,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820461132] [2021-06-12 20:06:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:09,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820461132] [2021-06-12 20:06:09,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820461132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631615385] [2021-06-12 20:06:09,186 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 20:06:09,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:09,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:09,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,290 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 17 treesize of output 13 [2021-06-12 20:06:09,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,293 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 16 treesize of output 12 [2021-06-12 20:06:09,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,297 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 16 treesize of output 12 [2021-06-12 20:06:09,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,300 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 15 treesize of output 11 [2021-06-12 20:06:09,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,386 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:06:09,391 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 20:06:09,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-12 20:06:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,576 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 16 treesize of output 12 [2021-06-12 20:06:09,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:09,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,669 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:06:09,670 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:09,672 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 7 treesize of output 5 [2021-06-12 20:06:09,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:09,706 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 8 treesize of output 6 [2021-06-12 20:06:09,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:09,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:09,736 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1720 vanished before elimination [2021-06-12 20:06:09,736 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1722 vanished before elimination [2021-06-12 20:06:09,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:09,737 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-12 20:06:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:09,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631615385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:09,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:09,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:09,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439076398] [2021-06-12 20:06:09,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:09,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:09,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:09,778 INFO L87 Difference]: Start difference. First operand 1378 states and 4561 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 20:06:10,617 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-12 20:06:10,922 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-12 20:06:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:11,065 INFO L93 Difference]: Finished difference Result 1822 states and 5770 transitions. [2021-06-12 20:06:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:06:11,065 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 25 [2021-06-12 20:06:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:11,068 INFO L225 Difference]: With dead ends: 1822 [2021-06-12 20:06:11,068 INFO L226 Difference]: Without dead ends: 1790 [2021-06-12 20:06:11,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1276.6ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:06:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-12 20:06:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1366. [2021-06-12 20:06:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.317948717948718) internal successors, (4529), 1365 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4529 transitions. [2021-06-12 20:06:11,084 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4529 transitions. Word has length 25 [2021-06-12 20:06:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:11,084 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4529 transitions. [2021-06-12 20:06:11,084 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 20:06:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4529 transitions. [2021-06-12 20:06:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:11,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:11,085 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:11,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:11,286 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1155805693, now seen corresponding path program 493 times [2021-06-12 20:06:11,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:11,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581292434] [2021-06-12 20:06:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:11,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:11,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581292434] [2021-06-12 20:06:11,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581292434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:11,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818378124] [2021-06-12 20:06:11,370 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 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 20:06:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:11,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,472 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 15 treesize of output 11 [2021-06-12 20:06:11,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,477 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 16 treesize of output 12 [2021-06-12 20:06:11,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,480 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 16 treesize of output 12 [2021-06-12 20:06:11,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:11,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:11,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:11,570 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:11,575 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 20:06:11,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818378124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:11,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:11,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:11,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312506041] [2021-06-12 20:06:11,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:11,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:11,824 INFO L87 Difference]: Start difference. First operand 1366 states and 4529 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:12,832 INFO L93 Difference]: Finished difference Result 1983 states and 6282 transitions. [2021-06-12 20:06:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:06:12,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:12,834 INFO L225 Difference]: With dead ends: 1983 [2021-06-12 20:06:12,834 INFO L226 Difference]: Without dead ends: 1983 [2021-06-12 20:06:12,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 882.8ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:06:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-12 20:06:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1366. [2021-06-12 20:06:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.318681318681319) internal successors, (4530), 1365 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4530 transitions. [2021-06-12 20:06:12,857 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4530 transitions. Word has length 25 [2021-06-12 20:06:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:12,857 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4530 transitions. [2021-06-12 20:06:12,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4530 transitions. [2021-06-12 20:06:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:12,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:12,859 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:13,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-12 20:06:13,059 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1142801967, now seen corresponding path program 494 times [2021-06-12 20:06:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:13,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886017342] [2021-06-12 20:06:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:13,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:13,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886017342] [2021-06-12 20:06:13,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886017342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:13,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319707046] [2021-06-12 20:06:13,141 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 20:06:13,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:13,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:13,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:13,200 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 17 treesize of output 13 [2021-06-12 20:06:13,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,202 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 17 treesize of output 13 [2021-06-12 20:06:13,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,204 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 18 treesize of output 14 [2021-06-12 20:06:13,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,207 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 18 treesize of output 14 [2021-06-12 20:06:13,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:13,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:13,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 20:06:13,313 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 18 treesize of output 14 [2021-06-12 20:06:13,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,316 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 20:06:13,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,318 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 20:06:13,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,321 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 18 treesize of output 14 [2021-06-12 20:06:13,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,323 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 17 treesize of output 13 [2021-06-12 20:06:13,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,326 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 18 treesize of output 14 [2021-06-12 20:06:13,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,328 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 18 treesize of output 14 [2021-06-12 20:06:13,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:06:13,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:13,378 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-12 20:06:13,378 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:13,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:13,379 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-12 20:06:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:13,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319707046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:13,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:13,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:13,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562779570] [2021-06-12 20:06:13,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:13,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:13,444 INFO L87 Difference]: Start difference. First operand 1366 states and 4530 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 20:06:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:13,885 INFO L93 Difference]: Finished difference Result 1771 states and 5671 transitions. [2021-06-12 20:06:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:13,885 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 25 [2021-06-12 20:06:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:13,887 INFO L225 Difference]: With dead ends: 1771 [2021-06-12 20:06:13,887 INFO L226 Difference]: Without dead ends: 1763 [2021-06-12 20:06:13,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-06-12 20:06:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1363. [2021-06-12 20:06:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.31791483113069) internal successors, (4519), 1362 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4519 transitions. [2021-06-12 20:06:13,903 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4519 transitions. Word has length 25 [2021-06-12 20:06:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:13,903 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4519 transitions. [2021-06-12 20:06:13,903 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 20:06:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4519 transitions. [2021-06-12 20:06:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:13,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:13,905 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:14,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4129 [2021-06-12 20:06:14,105 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1118528849, now seen corresponding path program 495 times [2021-06-12 20:06:14,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:14,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742941898] [2021-06-12 20:06:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:14,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:14,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742941898] [2021-06-12 20:06:14,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742941898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:14,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741675285] [2021-06-12 20:06:14,204 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 20:06:14,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:06:14,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:14,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,300 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 15 treesize of output 11 [2021-06-12 20:06:14,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,304 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 16 treesize of output 12 [2021-06-12 20:06:14,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,307 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 20:06:14,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,310 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 16 treesize of output 12 [2021-06-12 20:06:14,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,398 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:06:14,403 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 20:06:14,403 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:98 [2021-06-12 20:06:14,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:14,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:14,595 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 16 treesize of output 12 [2021-06-12 20:06:14,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,687 INFO L628 ElimStorePlain]: treesize reduction 132, result has 41.3 percent of original size [2021-06-12 20:06:14,687 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:14,690 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 8 treesize of output 6 [2021-06-12 20:06:14,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,722 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1731 vanished before elimination [2021-06-12 20:06:14,725 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 8 treesize of output 6 [2021-06-12 20:06:14,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:14,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:14,755 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1733 vanished before elimination [2021-06-12 20:06:14,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:14,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:32 [2021-06-12 20:06:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:14,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741675285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:14,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:14,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:14,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699419797] [2021-06-12 20:06:14,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:14,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:14,827 INFO L87 Difference]: Start difference. First operand 1363 states and 4519 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 20:06:15,187 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-12 20:06:15,652 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-06-12 20:06:15,925 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-06-12 20:06:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:16,170 INFO L93 Difference]: Finished difference Result 1796 states and 5758 transitions. [2021-06-12 20:06:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:06:16,170 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 25 [2021-06-12 20:06:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:16,172 INFO L225 Difference]: With dead ends: 1796 [2021-06-12 20:06:16,172 INFO L226 Difference]: Without dead ends: 1796 [2021-06-12 20:06:16,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1295.4ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:06:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-06-12 20:06:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1363. [2021-06-12 20:06:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.31791483113069) internal successors, (4519), 1362 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4519 transitions. [2021-06-12 20:06:16,188 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4519 transitions. Word has length 25 [2021-06-12 20:06:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:16,188 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4519 transitions. [2021-06-12 20:06:16,188 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 20:06:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4519 transitions. [2021-06-12 20:06:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:16,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:16,189 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:16,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:16,390 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1118873421, now seen corresponding path program 496 times [2021-06-12 20:06:16,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:16,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138099568] [2021-06-12 20:06:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:16,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:16,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138099568] [2021-06-12 20:06:16,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138099568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:16,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723311135] [2021-06-12 20:06:16,468 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 20:06:16,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:16,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:16,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,575 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 16 treesize of output 12 [2021-06-12 20:06:16,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,578 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 15 treesize of output 11 [2021-06-12 20:06:16,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,581 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 17 treesize of output 13 [2021-06-12 20:06:16,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:16,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:16,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:16,657 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:16,663 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 20:06:16,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:16,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723311135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:16,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:16,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:16,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532237224] [2021-06-12 20:06:16,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:16,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:16,904 INFO L87 Difference]: Start difference. First operand 1363 states and 4519 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 20:06:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:17,225 INFO L93 Difference]: Finished difference Result 1832 states and 5884 transitions. [2021-06-12 20:06:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:17,226 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 25 [2021-06-12 20:06:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:17,228 INFO L225 Difference]: With dead ends: 1832 [2021-06-12 20:06:17,228 INFO L226 Difference]: Without dead ends: 1817 [2021-06-12 20:06:17,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-12 20:06:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1356. [2021-06-12 20:06:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3143911439114393) internal successors, (4491), 1355 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4491 transitions. [2021-06-12 20:06:17,244 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4491 transitions. Word has length 25 [2021-06-12 20:06:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:17,244 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4491 transitions. [2021-06-12 20:06:17,244 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 20:06:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4491 transitions. [2021-06-12 20:06:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:17,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:17,245 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:17,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:17,446 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 944636679, now seen corresponding path program 497 times [2021-06-12 20:06:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:17,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856897042] [2021-06-12 20:06:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:17,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856897042] [2021-06-12 20:06:17,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856897042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295864598] [2021-06-12 20:06:17,551 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 20:06:17,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,648 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 17 treesize of output 13 [2021-06-12 20:06:17,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:17,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:17,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:17,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,744 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:06:17,749 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 20:06:17,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-12 20:06:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,948 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 16 treesize of output 12 [2021-06-12 20:06:17,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:17,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,043 INFO L628 ElimStorePlain]: treesize reduction 132, result has 41.3 percent of original size [2021-06-12 20:06:18,046 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 8 treesize of output 6 [2021-06-12 20:06:18,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:18,077 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:18,080 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 8 treesize of output 6 [2021-06-12 20:06:18,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:18,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:18,110 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1745 vanished before elimination [2021-06-12 20:06:18,110 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1744 vanished before elimination [2021-06-12 20:06:18,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:18,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-12 20:06:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:18,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295864598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:18,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:18,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:18,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373884487] [2021-06-12 20:06:18,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:18,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:18,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:18,169 INFO L87 Difference]: Start difference. First operand 1356 states and 4491 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 20:06:18,673 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-12 20:06:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:18,978 INFO L93 Difference]: Finished difference Result 1706 states and 5487 transitions. [2021-06-12 20:06:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:18,978 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 25 [2021-06-12 20:06:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:18,980 INFO L225 Difference]: With dead ends: 1706 [2021-06-12 20:06:18,980 INFO L226 Difference]: Without dead ends: 1682 [2021-06-12 20:06:18,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:06:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-12 20:06:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1348. [2021-06-12 20:06:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3147735708982924) internal successors, (4465), 1347 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4465 transitions. [2021-06-12 20:06:18,995 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4465 transitions. Word has length 25 [2021-06-12 20:06:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:18,996 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4465 transitions. [2021-06-12 20:06:18,996 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 20:06:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4465 transitions. [2021-06-12 20:06:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:18,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:18,997 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:19,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:19,197 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash 64363143, now seen corresponding path program 498 times [2021-06-12 20:06:19,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:19,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770321134] [2021-06-12 20:06:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:19,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:19,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770321134] [2021-06-12 20:06:19,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770321134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:19,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383688258] [2021-06-12 20:06:19,304 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 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 20:06:19,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:19,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,399 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 16 treesize of output 12 [2021-06-12 20:06:19,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,402 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 20:06:19,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:19,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,409 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 16 treesize of output 12 [2021-06-12 20:06:19,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,495 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:06:19,500 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 20:06:19,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-12 20:06:19,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,686 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 20:06:19,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:19,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:19,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,779 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:06:19,780 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:19,782 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 8 treesize of output 6 [2021-06-12 20:06:19,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:19,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1751 vanished before elimination [2021-06-12 20:06:19,816 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 7 treesize of output 5 [2021-06-12 20:06:19,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:19,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:19,845 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1753 vanished before elimination [2021-06-12 20:06:19,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:19,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:32 [2021-06-12 20:06:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383688258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:19,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:19,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:19,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323377094] [2021-06-12 20:06:19,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:19,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:19,903 INFO L87 Difference]: Start difference. First operand 1348 states and 4465 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 20:06:20,458 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-12 20:06:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:20,650 INFO L93 Difference]: Finished difference Result 1653 states and 5382 transitions. [2021-06-12 20:06:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:20,650 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 25 [2021-06-12 20:06:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:20,652 INFO L225 Difference]: With dead ends: 1653 [2021-06-12 20:06:20,652 INFO L226 Difference]: Without dead ends: 1653 [2021-06-12 20:06:20,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-06-12 20:06:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1332. [2021-06-12 20:06:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3140495867768593) internal successors, (4411), 1331 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4411 transitions. [2021-06-12 20:06:20,667 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4411 transitions. Word has length 25 [2021-06-12 20:06:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:20,667 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4411 transitions. [2021-06-12 20:06:20,667 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 20:06:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4411 transitions. [2021-06-12 20:06:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:20,668 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:20,668 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:20,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4184 [2021-06-12 20:06:20,868 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 773587157, now seen corresponding path program 499 times [2021-06-12 20:06:20,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:20,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911774461] [2021-06-12 20:06:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:20,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911774461] [2021-06-12 20:06:20,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911774461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855965920] [2021-06-12 20:06:20,944 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 20:06:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:20,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:21,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:21,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:21,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,040 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 15 treesize of output 11 [2021-06-12 20:06:21,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:21,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:21,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:21,117 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:21,122 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 20:06:21,122 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:21,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855965920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:21,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:21,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:21,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815732006] [2021-06-12 20:06:21,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:21,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:21,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:21,345 INFO L87 Difference]: Start difference. First operand 1332 states and 4411 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 20:06:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:21,800 INFO L93 Difference]: Finished difference Result 1760 states and 5647 transitions. [2021-06-12 20:06:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:21,801 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 25 [2021-06-12 20:06:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:21,803 INFO L225 Difference]: With dead ends: 1760 [2021-06-12 20:06:21,803 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 20:06:21,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 20:06:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1344. [2021-06-12 20:06:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3037974683544302) internal successors, (4437), 1343 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4437 transitions. [2021-06-12 20:06:21,818 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4437 transitions. Word has length 25 [2021-06-12 20:06:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:21,818 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4437 transitions. [2021-06-12 20:06:21,818 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 20:06:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4437 transitions. [2021-06-12 20:06:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:21,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:21,819 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:22,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4196 [2021-06-12 20:06:22,019 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash 633158997, now seen corresponding path program 500 times [2021-06-12 20:06:22,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:22,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129254925] [2021-06-12 20:06:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:22,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:22,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129254925] [2021-06-12 20:06:22,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129254925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:22,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574855919] [2021-06-12 20:06:22,089 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 20:06:22,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:22,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,187 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 17 treesize of output 13 [2021-06-12 20:06:22,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,190 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 16 treesize of output 12 [2021-06-12 20:06:22,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,194 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 15 treesize of output 11 [2021-06-12 20:06:22,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:22,197 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 16 treesize of output 12 [2021-06-12 20:06:22,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:22,268 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:06:22,273 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 20:06:22,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:06:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:22,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574855919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:22,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:22,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:22,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347115336] [2021-06-12 20:06:22,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:22,492 INFO L87 Difference]: Start difference. First operand 1344 states and 4437 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 20:06:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:22,925 INFO L93 Difference]: Finished difference Result 1706 states and 5531 transitions. [2021-06-12 20:06:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:22,925 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 25 [2021-06-12 20:06:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:22,927 INFO L225 Difference]: With dead ends: 1706 [2021-06-12 20:06:22,927 INFO L226 Difference]: Without dead ends: 1689 [2021-06-12 20:06:22,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-06-12 20:06:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1332. [2021-06-12 20:06:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.313298271975958) internal successors, (4410), 1331 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4410 transitions. [2021-06-12 20:06:22,941 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4410 transitions. Word has length 25 [2021-06-12 20:06:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:22,941 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4410 transitions. [2021-06-12 20:06:22,941 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 20:06:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4410 transitions. [2021-06-12 20:06:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:22,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:22,942 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:23,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4212,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:23,143 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1217461897, now seen corresponding path program 501 times [2021-06-12 20:06:23,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:23,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438571607] [2021-06-12 20:06:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:23,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:23,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438571607] [2021-06-12 20:06:23,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438571607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:23,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436687483] [2021-06-12 20:06:23,216 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 20:06:23,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:23,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,354 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 15 treesize of output 11 [2021-06-12 20:06:23,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:23,357 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 16 treesize of output 12 [2021-06-12 20:06:23,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:23,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:23,380 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 20:06:23,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:55 [2021-06-12 20:06:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436687483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951006997] [2021-06-12 20:06:23,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:23,487 INFO L87 Difference]: Start difference. First operand 1332 states and 4410 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:23,711 INFO L93 Difference]: Finished difference Result 1474 states and 4834 transitions. [2021-06-12 20:06:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:23,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:23,713 INFO L225 Difference]: With dead ends: 1474 [2021-06-12 20:06:23,713 INFO L226 Difference]: Without dead ends: 1474 [2021-06-12 20:06:23,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-06-12 20:06:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1338. [2021-06-12 20:06:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3118922961854897) internal successors, (4428), 1337 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4428 transitions. [2021-06-12 20:06:23,726 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4428 transitions. Word has length 25 [2021-06-12 20:06:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:23,726 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4428 transitions. [2021-06-12 20:06:23,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4428 transitions. [2021-06-12 20:06:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:23,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:23,728 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:23,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4232 [2021-06-12 20:06:23,928 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:23,928 INFO L82 PathProgramCache]: Analyzing trace with hash -520509919, now seen corresponding path program 502 times [2021-06-12 20:06:23,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:23,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472443425] [2021-06-12 20:06:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472443425] [2021-06-12 20:06:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472443425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852124954] [2021-06-12 20:06:24,004 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 20:06:24,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:24,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:24,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:24,083 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 23 treesize of output 17 [2021-06-12 20:06:24,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:06:24,086 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 22 treesize of output 16 [2021-06-12 20:06:24,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:24,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:24,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:06:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852124954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:24,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:24,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153719619] [2021-06-12 20:06:24,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:24,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:24,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:24,164 INFO L87 Difference]: Start difference. First operand 1338 states and 4428 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:24,335 INFO L93 Difference]: Finished difference Result 1534 states and 4984 transitions. [2021-06-12 20:06:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:24,337 INFO L225 Difference]: With dead ends: 1534 [2021-06-12 20:06:24,337 INFO L226 Difference]: Without dead ends: 1534 [2021-06-12 20:06:24,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-12 20:06:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1339. [2021-06-12 20:06:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.313153961136024) internal successors, (4433), 1338 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4433 transitions. [2021-06-12 20:06:24,351 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4433 transitions. Word has length 25 [2021-06-12 20:06:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:24,351 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4433 transitions. [2021-06-12 20:06:24,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4433 transitions. [2021-06-12 20:06:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:24,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:24,352 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:24,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4239 [2021-06-12 20:06:24,553 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2006984341, now seen corresponding path program 503 times [2021-06-12 20:06:24,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:24,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614323027] [2021-06-12 20:06:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:24,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614323027] [2021-06-12 20:06:24,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614323027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045574119] [2021-06-12 20:06:24,624 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 20:06:24,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:06:24,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:24,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:24,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,775 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 15 treesize of output 11 [2021-06-12 20:06:24,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:24,778 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 16 treesize of output 12 [2021-06-12 20:06:24,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:24,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:24,801 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 20:06:24,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:55 [2021-06-12 20:06:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:24,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045574119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:24,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:24,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:24,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362822773] [2021-06-12 20:06:24,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:24,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:24,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:24,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:24,908 INFO L87 Difference]: Start difference. First operand 1339 states and 4433 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:25,141 INFO L93 Difference]: Finished difference Result 1444 states and 4738 transitions. [2021-06-12 20:06:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:25,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:25,143 INFO L225 Difference]: With dead ends: 1444 [2021-06-12 20:06:25,143 INFO L226 Difference]: Without dead ends: 1438 [2021-06-12 20:06:25,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-12 20:06:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1335. [2021-06-12 20:06:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.312593703148426) internal successors, (4419), 1334 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4419 transitions. [2021-06-12 20:06:25,156 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4419 transitions. Word has length 25 [2021-06-12 20:06:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:25,156 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4419 transitions. [2021-06-12 20:06:25,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4419 transitions. [2021-06-12 20:06:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:25,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:25,157 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:25,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:25,366 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1058002775, now seen corresponding path program 504 times [2021-06-12 20:06:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:25,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048517042] [2021-06-12 20:06:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:25,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048517042] [2021-06-12 20:06:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048517042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848174632] [2021-06-12 20:06:25,448 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 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 20:06:25,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:06:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:25,529 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 22 treesize of output 16 [2021-06-12 20:06:25,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:25,531 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 23 treesize of output 17 [2021-06-12 20:06:25,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:06:25,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:25,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:06:25,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-06-12 20:06:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848174632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:25,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:25,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:25,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530492138] [2021-06-12 20:06:25,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:25,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:25,618 INFO L87 Difference]: Start difference. First operand 1335 states and 4419 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:25,880 INFO L93 Difference]: Finished difference Result 1498 states and 4876 transitions. [2021-06-12 20:06:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:25,882 INFO L225 Difference]: With dead ends: 1498 [2021-06-12 20:06:25,882 INFO L226 Difference]: Without dead ends: 1498 [2021-06-12 20:06:25,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-06-12 20:06:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1339. [2021-06-12 20:06:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3153961136023917) internal successors, (4436), 1338 states have internal predecessors, (4436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4436 transitions. [2021-06-12 20:06:25,896 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4436 transitions. Word has length 25 [2021-06-12 20:06:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:25,896 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4436 transitions. [2021-06-12 20:06:25,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4436 transitions. [2021-06-12 20:06:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:25,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:25,897 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:26,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-06-12 20:06:26,098 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1750490099, now seen corresponding path program 505 times [2021-06-12 20:06:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577498363] [2021-06-12 20:06:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:26,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:26,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577498363] [2021-06-12 20:06:26,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577498363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:26,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442245415] [2021-06-12 20:06:26,168 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 20:06:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,302 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 15 treesize of output 11 [2021-06-12 20:06:26,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:26,305 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 16 treesize of output 12 [2021-06-12 20:06:26,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:26,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:26,326 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 20:06:26,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:06:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:26,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442245415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:26,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:26,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:26,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823611269] [2021-06-12 20:06:26,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:26,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:26,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:26,392 INFO L87 Difference]: Start difference. First operand 1339 states and 4436 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:26,764 INFO L93 Difference]: Finished difference Result 1483 states and 4822 transitions. [2021-06-12 20:06:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:06:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:26,766 INFO L225 Difference]: With dead ends: 1483 [2021-06-12 20:06:26,766 INFO L226 Difference]: Without dead ends: 1477 [2021-06-12 20:06:26,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-06-12 20:06:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1338. [2021-06-12 20:06:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3141361256544504) internal successors, (4431), 1337 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4431 transitions. [2021-06-12 20:06:26,779 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4431 transitions. Word has length 25 [2021-06-12 20:06:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:26,779 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4431 transitions. [2021-06-12 20:06:26,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4431 transitions. [2021-06-12 20:06:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:26,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:26,780 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:26,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4268,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:26,981 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash 689712009, now seen corresponding path program 506 times [2021-06-12 20:06:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:26,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078518580] [2021-06-12 20:06:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:27,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078518580] [2021-06-12 20:06:27,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078518580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132804562] [2021-06-12 20:06:27,050 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 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 20:06:27,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:27,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:27,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:27,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,187 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 16 treesize of output 12 [2021-06-12 20:06:27,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:27,190 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 15 treesize of output 11 [2021-06-12 20:06:27,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:27,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:27,212 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 20:06:27,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:06:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132804562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:27,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:27,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:27,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358724740] [2021-06-12 20:06:27,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:27,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:27,281 INFO L87 Difference]: Start difference. First operand 1338 states and 4431 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:27,622 INFO L93 Difference]: Finished difference Result 1402 states and 4609 transitions. [2021-06-12 20:06:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:27,624 INFO L225 Difference]: With dead ends: 1402 [2021-06-12 20:06:27,624 INFO L226 Difference]: Without dead ends: 1390 [2021-06-12 20:06:27,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-12 20:06:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1332. [2021-06-12 20:06:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.313298271975958) internal successors, (4410), 1331 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4410 transitions. [2021-06-12 20:06:27,636 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4410 transitions. Word has length 25 [2021-06-12 20:06:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:27,636 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4410 transitions. [2021-06-12 20:06:27,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4410 transitions. [2021-06-12 20:06:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:27,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:27,637 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:27,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4276 [2021-06-12 20:06:27,838 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -175653641, now seen corresponding path program 507 times [2021-06-12 20:06:27,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:27,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961521169] [2021-06-12 20:06:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:27,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:27,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961521169] [2021-06-12 20:06:27,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961521169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35365701] [2021-06-12 20:06:27,936 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 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 20:06:27,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:27,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:27,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:28,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,080 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 20:06:28,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:28,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:28,118 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.8 percent of original size [2021-06-12 20:06:28,120 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 20:06:28,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:32 [2021-06-12 20:06:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:28,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35365701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:28,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:28,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:28,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70548629] [2021-06-12 20:06:28,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:28,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:28,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:28,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:28,164 INFO L87 Difference]: Start difference. First operand 1332 states and 4410 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 20:06:28,419 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-12 20:06:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:28,665 INFO L93 Difference]: Finished difference Result 1435 states and 4646 transitions. [2021-06-12 20:06:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:28,665 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 25 [2021-06-12 20:06:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:28,667 INFO L225 Difference]: With dead ends: 1435 [2021-06-12 20:06:28,667 INFO L226 Difference]: Without dead ends: 1421 [2021-06-12 20:06:28,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-12 20:06:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1354. [2021-06-12 20:06:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.29859571322986) internal successors, (4463), 1353 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4463 transitions. [2021-06-12 20:06:28,680 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4463 transitions. Word has length 25 [2021-06-12 20:06:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:28,680 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 4463 transitions. [2021-06-12 20:06:28,680 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 20:06:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4463 transitions. [2021-06-12 20:06:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:28,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:28,682 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:28,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4284,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:28,882 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1913625457, now seen corresponding path program 508 times [2021-06-12 20:06:28,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:28,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119224412] [2021-06-12 20:06:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:28,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:28,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119224412] [2021-06-12 20:06:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119224412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064610185] [2021-06-12 20:06:28,969 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 20:06:28,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:28,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:29,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,122 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 20:06:29,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,124 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 16 treesize of output 12 [2021-06-12 20:06:29,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,158 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.8 percent of original size [2021-06-12 20:06:29,161 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 20:06:29,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:32 [2021-06-12 20:06:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:29,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064610185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:29,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:29,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:29,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651836124] [2021-06-12 20:06:29,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:29,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:29,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:29,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:29,203 INFO L87 Difference]: Start difference. First operand 1354 states and 4463 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 20:06:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:29,354 INFO L93 Difference]: Finished difference Result 1374 states and 4520 transitions. [2021-06-12 20:06:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:29,354 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 25 [2021-06-12 20:06:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:29,356 INFO L225 Difference]: With dead ends: 1374 [2021-06-12 20:06:29,356 INFO L226 Difference]: Without dead ends: 1364 [2021-06-12 20:06:29,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-12 20:06:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1334. [2021-06-12 20:06:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.3105776444111026) internal successors, (4413), 1333 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4413 transitions. [2021-06-12 20:06:29,368 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4413 transitions. Word has length 25 [2021-06-12 20:06:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:29,368 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4413 transitions. [2021-06-12 20:06:29,368 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 20:06:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4413 transitions. [2021-06-12 20:06:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:29,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:29,369 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:29,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-12 20:06:29,570 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:29,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1396034809, now seen corresponding path program 509 times [2021-06-12 20:06:29,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:29,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863976587] [2021-06-12 20:06:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:29,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:29,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863976587] [2021-06-12 20:06:29,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863976587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:29,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741466228] [2021-06-12 20:06:29,650 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 20:06:29,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:06:29,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:29,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,799 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 20:06:29,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:29,802 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 16 treesize of output 12 [2021-06-12 20:06:29,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:29,831 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.2 percent of original size [2021-06-12 20:06:29,832 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 20:06:29,832 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:34 [2021-06-12 20:06:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:29,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741466228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:29,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:29,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:29,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536289461] [2021-06-12 20:06:29,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:29,876 INFO L87 Difference]: Start difference. First operand 1334 states and 4413 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 20:06:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:30,136 INFO L93 Difference]: Finished difference Result 1480 states and 4748 transitions. [2021-06-12 20:06:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:06:30,136 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 25 [2021-06-12 20:06:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:30,138 INFO L225 Difference]: With dead ends: 1480 [2021-06-12 20:06:30,138 INFO L226 Difference]: Without dead ends: 1454 [2021-06-12 20:06:30,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-12 20:06:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1350. [2021-06-12 20:06:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3054114158636025) internal successors, (4459), 1349 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4459 transitions. [2021-06-12 20:06:30,160 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4459 transitions. Word has length 25 [2021-06-12 20:06:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:30,160 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4459 transitions. [2021-06-12 20:06:30,160 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 20:06:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4459 transitions. [2021-06-12 20:06:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:30,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:30,161 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:30,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:30,362 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:30,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:30,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1933527665, now seen corresponding path program 510 times [2021-06-12 20:06:30,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:30,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123242467] [2021-06-12 20:06:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:30,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123242467] [2021-06-12 20:06:30,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123242467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459068171] [2021-06-12 20:06:30,456 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 20:06:30,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:06:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:30,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,608 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 16 treesize of output 12 [2021-06-12 20:06:30,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:30,611 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 20:06:30,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:30,640 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.2 percent of original size [2021-06-12 20:06:30,641 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 2 xjuncts. [2021-06-12 20:06:30,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:34 [2021-06-12 20:06:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:30,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459068171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:30,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:30,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400944885] [2021-06-12 20:06:30,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:30,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:30,700 INFO L87 Difference]: Start difference. First operand 1350 states and 4459 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 20:06:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:30,973 INFO L93 Difference]: Finished difference Result 1378 states and 4528 transitions. [2021-06-12 20:06:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:30,973 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 25 [2021-06-12 20:06:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:30,975 INFO L225 Difference]: With dead ends: 1378 [2021-06-12 20:06:30,975 INFO L226 Difference]: Without dead ends: 1362 [2021-06-12 20:06:30,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-12 20:06:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1332. [2021-06-12 20:06:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3125469571750563) internal successors, (4409), 1331 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4409 transitions. [2021-06-12 20:06:30,987 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4409 transitions. Word has length 25 [2021-06-12 20:06:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:30,987 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4409 transitions. [2021-06-12 20:06:30,987 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 20:06:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4409 transitions. [2021-06-12 20:06:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:30,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:30,988 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:31,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:31,189 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:31,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1951946811, now seen corresponding path program 511 times [2021-06-12 20:06:31,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:31,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632338242] [2021-06-12 20:06:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:31,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:31,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632338242] [2021-06-12 20:06:31,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632338242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:31,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020822047] [2021-06-12 20:06:31,274 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 20:06:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:31,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,407 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 16 treesize of output 12 [2021-06-12 20:06:31,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,410 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 15 treesize of output 11 [2021-06-12 20:06:31,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:31,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:31,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:31,514 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:31,520 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 20:06:31,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:31,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020822047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:31,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:31,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:31,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126768382] [2021-06-12 20:06:31,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:31,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:31,711 INFO L87 Difference]: Start difference. First operand 1332 states and 4409 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:31,978 INFO L93 Difference]: Finished difference Result 1552 states and 5067 transitions. [2021-06-12 20:06:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:31,980 INFO L225 Difference]: With dead ends: 1552 [2021-06-12 20:06:31,980 INFO L226 Difference]: Without dead ends: 1552 [2021-06-12 20:06:31,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-06-12 20:06:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1347. [2021-06-12 20:06:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 3.3112927191679047) internal successors, (4457), 1346 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 4457 transitions. [2021-06-12 20:06:31,994 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 4457 transitions. Word has length 25 [2021-06-12 20:06:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:31,994 INFO L482 AbstractCegarLoop]: Abstraction has 1347 states and 4457 transitions. [2021-06-12 20:06:31,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 4457 transitions. [2021-06-12 20:06:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:31,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:31,995 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:32,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4320 [2021-06-12 20:06:32,196 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash 213974995, now seen corresponding path program 512 times [2021-06-12 20:06:32,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:32,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521478428] [2021-06-12 20:06:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:32,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:32,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521478428] [2021-06-12 20:06:32,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521478428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:32,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341998490] [2021-06-12 20:06:32,274 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 20:06:32,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:32,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,402 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 16 treesize of output 12 [2021-06-12 20:06:32,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,405 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 17 treesize of output 13 [2021-06-12 20:06:32,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,409 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 15 treesize of output 11 [2021-06-12 20:06:32,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,412 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 16 treesize of output 12 [2021-06-12 20:06:32,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,493 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:32,498 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 20:06:32,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,649 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 18 treesize of output 14 [2021-06-12 20:06:32,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:32,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,719 INFO L628 ElimStorePlain]: treesize reduction 88, result has 41.7 percent of original size [2021-06-12 20:06:32,719 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:32,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:32,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:32,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:32,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 5 [2021-06-12 20:06:32,746 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:06:32,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:32,767 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 20:06:32,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:165, output treesize:22 [2021-06-12 20:06:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:32,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341998490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:32,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:32,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852787605] [2021-06-12 20:06:32,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:32,811 INFO L87 Difference]: Start difference. First operand 1347 states and 4457 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:33,166 INFO L93 Difference]: Finished difference Result 1702 states and 5451 transitions. [2021-06-12 20:06:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:06:33,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:33,168 INFO L225 Difference]: With dead ends: 1702 [2021-06-12 20:06:33,168 INFO L226 Difference]: Without dead ends: 1702 [2021-06-12 20:06:33,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-06-12 20:06:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1352. [2021-06-12 20:06:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.318282753515914) internal successors, (4483), 1351 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4483 transitions. [2021-06-12 20:06:33,183 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4483 transitions. Word has length 25 [2021-06-12 20:06:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:33,183 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4483 transitions. [2021-06-12 20:06:33,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4483 transitions. [2021-06-12 20:06:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:33,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:33,185 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:33,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4331 [2021-06-12 20:06:33,385 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:33,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1272499427, now seen corresponding path program 513 times [2021-06-12 20:06:33,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:33,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036770179] [2021-06-12 20:06:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:33,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036770179] [2021-06-12 20:06:33,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036770179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238262171] [2021-06-12 20:06:33,460 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 20:06:33,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:06:33,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:33,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:33,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:33,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,579 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 16 treesize of output 12 [2021-06-12 20:06:33,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,583 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 15 treesize of output 11 [2021-06-12 20:06:33,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,586 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 20:06:33,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:33,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:33,685 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:33,690 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 20:06:33,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:33,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238262171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:33,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:33,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:33,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739119084] [2021-06-12 20:06:33,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:33,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:33,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:33,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:33,883 INFO L87 Difference]: Start difference. First operand 1352 states and 4483 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:34,203 INFO L93 Difference]: Finished difference Result 1552 states and 5028 transitions. [2021-06-12 20:06:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:34,205 INFO L225 Difference]: With dead ends: 1552 [2021-06-12 20:06:34,205 INFO L226 Difference]: Without dead ends: 1528 [2021-06-12 20:06:34,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-12 20:06:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1338. [2021-06-12 20:06:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3163799551234106) internal successors, (4434), 1337 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4434 transitions. [2021-06-12 20:06:34,218 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4434 transitions. Word has length 25 [2021-06-12 20:06:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:34,218 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4434 transitions. [2021-06-12 20:06:34,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4434 transitions. [2021-06-12 20:06:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:34,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:34,220 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:34,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-12 20:06:34,420 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:34,420 INFO L82 PathProgramCache]: Analyzing trace with hash 381897517, now seen corresponding path program 514 times [2021-06-12 20:06:34,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:34,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548343302] [2021-06-12 20:06:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:34,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:34,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548343302] [2021-06-12 20:06:34,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548343302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626355259] [2021-06-12 20:06:34,559 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 20:06:34,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:34,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,689 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 18 treesize of output 14 [2021-06-12 20:06:34,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,693 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 18 treesize of output 14 [2021-06-12 20:06:34,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,697 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 20:06:34,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:34,700 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 20:06:34,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:34,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:34,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:34,771 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:06:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626355259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:34,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927886638] [2021-06-12 20:06:34,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:34,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:34,972 INFO L87 Difference]: Start difference. First operand 1338 states and 4434 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:35,318 INFO L93 Difference]: Finished difference Result 1398 states and 4585 transitions. [2021-06-12 20:06:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:35,320 INFO L225 Difference]: With dead ends: 1398 [2021-06-12 20:06:35,321 INFO L226 Difference]: Without dead ends: 1370 [2021-06-12 20:06:35,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-12 20:06:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1338. [2021-06-12 20:06:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3163799551234106) internal successors, (4434), 1337 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4434 transitions. [2021-06-12 20:06:35,333 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4434 transitions. Word has length 25 [2021-06-12 20:06:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:35,333 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4434 transitions. [2021-06-12 20:06:35,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4434 transitions. [2021-06-12 20:06:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:35,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:35,335 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:35,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4356,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:35,535 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1955621227, now seen corresponding path program 515 times [2021-06-12 20:06:35,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:35,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299937956] [2021-06-12 20:06:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:35,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:35,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299937956] [2021-06-12 20:06:35,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299937956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:35,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152842129] [2021-06-12 20:06:35,642 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 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 20:06:35,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:06:35,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,782 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 20:06:35,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:35,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,790 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 18 treesize of output 14 [2021-06-12 20:06:35,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:35,794 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 20:06:35,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:35,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:35,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:35,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:06:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152842129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:36,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:36,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845419710] [2021-06-12 20:06:36,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:36,023 INFO L87 Difference]: Start difference. First operand 1338 states and 4434 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 20:06:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:36,409 INFO L93 Difference]: Finished difference Result 1439 states and 4665 transitions. [2021-06-12 20:06:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:06:36,409 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 25 [2021-06-12 20:06:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:36,410 INFO L225 Difference]: With dead ends: 1439 [2021-06-12 20:06:36,411 INFO L226 Difference]: Without dead ends: 1425 [2021-06-12 20:06:36,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-12 20:06:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1358. [2021-06-12 20:06:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3028739867354457) internal successors, (4482), 1357 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4482 transitions. [2021-06-12 20:06:36,424 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4482 transitions. Word has length 25 [2021-06-12 20:06:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:36,424 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4482 transitions. [2021-06-12 20:06:36,424 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 20:06:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4482 transitions. [2021-06-12 20:06:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:36,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:36,425 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:36,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4364 [2021-06-12 20:06:36,626 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash 601374253, now seen corresponding path program 516 times [2021-06-12 20:06:36,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:36,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960283278] [2021-06-12 20:06:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:36,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:36,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960283278] [2021-06-12 20:06:36,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960283278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:36,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015642729] [2021-06-12 20:06:36,730 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 20:06:36,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:36,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:36,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:36,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,868 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 20:06:36,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,872 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 15 treesize of output 11 [2021-06-12 20:06:36,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,876 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 16 treesize of output 12 [2021-06-12 20:06:36,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:36,879 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 16 treesize of output 12 [2021-06-12 20:06:36,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:36,977 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:36,983 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 20:06:36,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-12 20:06:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:37,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015642729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:37,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:37,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559221720] [2021-06-12 20:06:37,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:37,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:37,135 INFO L87 Difference]: Start difference. First operand 1358 states and 4482 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 20:06:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:37,593 INFO L93 Difference]: Finished difference Result 1378 states and 4539 transitions. [2021-06-12 20:06:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:06:37,593 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 25 [2021-06-12 20:06:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:37,595 INFO L225 Difference]: With dead ends: 1378 [2021-06-12 20:06:37,595 INFO L226 Difference]: Without dead ends: 1368 [2021-06-12 20:06:37,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-12 20:06:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1338. [2021-06-12 20:06:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3156320119670903) internal successors, (4433), 1337 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4433 transitions. [2021-06-12 20:06:37,607 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4433 transitions. Word has length 25 [2021-06-12 20:06:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:37,607 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4433 transitions. [2021-06-12 20:06:37,607 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 20:06:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4433 transitions. [2021-06-12 20:06:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:37,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:37,609 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:37,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4377,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:37,809 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 144471227, now seen corresponding path program 517 times [2021-06-12 20:06:37,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:37,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256480830] [2021-06-12 20:06:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:37,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:37,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256480830] [2021-06-12 20:06:37,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256480830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:37,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787859572] [2021-06-12 20:06:37,885 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 20:06:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,005 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 16 treesize of output 12 [2021-06-12 20:06:38,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,009 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 16 treesize of output 12 [2021-06-12 20:06:38,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,012 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 17 treesize of output 13 [2021-06-12 20:06:38,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:38,016 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 15 treesize of output 11 [2021-06-12 20:06:38,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:38,099 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:38,104 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 20:06:38,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:38,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787859572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:38,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:38,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:38,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342733422] [2021-06-12 20:06:38,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:38,311 INFO L87 Difference]: Start difference. First operand 1338 states and 4433 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:38,657 INFO L93 Difference]: Finished difference Result 1487 states and 4872 transitions. [2021-06-12 20:06:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:38,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:06:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:38,659 INFO L225 Difference]: With dead ends: 1487 [2021-06-12 20:06:38,659 INFO L226 Difference]: Without dead ends: 1487 [2021-06-12 20:06:38,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-12 20:06:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1332. [2021-06-12 20:06:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.311795642374155) internal successors, (4408), 1331 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4408 transitions. [2021-06-12 20:06:38,672 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4408 transitions. Word has length 25 [2021-06-12 20:06:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:38,672 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4408 transitions. [2021-06-12 20:06:38,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4408 transitions. [2021-06-12 20:06:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:38,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:38,674 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:38,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-06-12 20:06:38,874 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:38,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:38,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1270903085, now seen corresponding path program 518 times [2021-06-12 20:06:38,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:38,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870603986] [2021-06-12 20:06:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:38,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:38,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870603986] [2021-06-12 20:06:38,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870603986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:38,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617374581] [2021-06-12 20:06:38,965 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 20:06:38,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:38,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:39,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:39,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,098 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 16 treesize of output 12 [2021-06-12 20:06:39,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,102 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 15 treesize of output 11 [2021-06-12 20:06:39,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:39,105 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 16 treesize of output 12 [2021-06-12 20:06:39,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:39,185 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:39,190 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 20:06:39,190 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:39,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617374581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:39,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:39,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:39,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037730906] [2021-06-12 20:06:39,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:39,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:39,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:39,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:39,442 INFO L87 Difference]: Start difference. First operand 1332 states and 4408 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 20:06:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:39,645 INFO L93 Difference]: Finished difference Result 1463 states and 4800 transitions. [2021-06-12 20:06:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:39,646 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 25 [2021-06-12 20:06:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:39,648 INFO L225 Difference]: With dead ends: 1463 [2021-06-12 20:06:39,648 INFO L226 Difference]: Without dead ends: 1463 [2021-06-12 20:06:39,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:06:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-12 20:06:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1332. [2021-06-12 20:06:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.311795642374155) internal successors, (4408), 1331 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4408 transitions. [2021-06-12 20:06:39,662 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4408 transitions. Word has length 25 [2021-06-12 20:06:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:39,662 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4408 transitions. [2021-06-12 20:06:39,662 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 20:06:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4408 transitions. [2021-06-12 20:06:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:39,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:39,663 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:39,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4393 [2021-06-12 20:06:39,864 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:39,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1756684499, now seen corresponding path program 519 times [2021-06-12 20:06:39,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:39,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820231395] [2021-06-12 20:06:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:39,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:39,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820231395] [2021-06-12 20:06:39,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820231395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:39,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355735649] [2021-06-12 20:06:39,969 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 20:06:39,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:06:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:40,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,107 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 20:06:40,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,110 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 16 treesize of output 12 [2021-06-12 20:06:40,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:40,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,118 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 15 treesize of output 11 [2021-06-12 20:06:40,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,214 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:40,220 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 20:06:40,220 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-12 20:06:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:40,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:40,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:40,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,487 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-06-12 20:06:40,487 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:06:40,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:40,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:40,506 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1820 vanished before elimination [2021-06-12 20:06:40,507 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 20:06:40,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:153, output treesize:18 [2021-06-12 20:06:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:40,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355735649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:40,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:40,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:40,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607654052] [2021-06-12 20:06:40,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:40,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:40,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:40,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:40,545 INFO L87 Difference]: Start difference. First operand 1332 states and 4408 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 20:06:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:41,079 INFO L93 Difference]: Finished difference Result 1391 states and 4584 transitions. [2021-06-12 20:06:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:06:41,080 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 25 [2021-06-12 20:06:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:41,081 INFO L225 Difference]: With dead ends: 1391 [2021-06-12 20:06:41,081 INFO L226 Difference]: Without dead ends: 1391 [2021-06-12 20:06:41,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-12 20:06:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1311. [2021-06-12 20:06:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.3061068702290077) internal successors, (4331), 1310 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4331 transitions. [2021-06-12 20:06:41,094 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4331 transitions. Word has length 25 [2021-06-12 20:06:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:41,094 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4331 transitions. [2021-06-12 20:06:41,094 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 20:06:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4331 transitions. [2021-06-12 20:06:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:41,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:41,095 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:41,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4408,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:41,296 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash -639698583, now seen corresponding path program 520 times [2021-06-12 20:06:41,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:41,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019301944] [2021-06-12 20:06:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:41,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:41,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019301944] [2021-06-12 20:06:41,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019301944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:41,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058938832] [2021-06-12 20:06:41,375 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 20:06:41,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:41,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:41,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:41,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,495 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 16 treesize of output 12 [2021-06-12 20:06:41,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,499 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 16 treesize of output 12 [2021-06-12 20:06:41,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,502 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 15 treesize of output 11 [2021-06-12 20:06:41,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:41,505 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 20:06:41,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:41,586 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:41,591 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 20:06:41,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:41,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058938832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:41,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:41,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:41,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835230867] [2021-06-12 20:06:41,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:41,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:41,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:41,800 INFO L87 Difference]: Start difference. First operand 1311 states and 4331 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:42,160 INFO L93 Difference]: Finished difference Result 1757 states and 5560 transitions. [2021-06-12 20:06:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:06:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:42,162 INFO L225 Difference]: With dead ends: 1757 [2021-06-12 20:06:42,162 INFO L226 Difference]: Without dead ends: 1757 [2021-06-12 20:06:42,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-06-12 20:06:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1320. [2021-06-12 20:06:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.3191811978771795) internal successors, (4378), 1319 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4378 transitions. [2021-06-12 20:06:42,177 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4378 transitions. Word has length 25 [2021-06-12 20:06:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:42,177 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 4378 transitions. [2021-06-12 20:06:42,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4378 transitions. [2021-06-12 20:06:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:42,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:42,179 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:42,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4418 [2021-06-12 20:06:42,379 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2126173005, now seen corresponding path program 521 times [2021-06-12 20:06:42,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:42,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996141360] [2021-06-12 20:06:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:42,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996141360] [2021-06-12 20:06:42,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996141360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769208948] [2021-06-12 20:06:42,462 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 20:06:42,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:42,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,593 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 15 treesize of output 11 [2021-06-12 20:06:42,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:42,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:42,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:42,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:42,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:42,685 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:42,690 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 20:06:42,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:42,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769208948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:42,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:42,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486253725] [2021-06-12 20:06:42,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:42,885 INFO L87 Difference]: Start difference. First operand 1320 states and 4378 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:43,106 INFO L93 Difference]: Finished difference Result 1613 states and 5161 transitions. [2021-06-12 20:06:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:43,108 INFO L225 Difference]: With dead ends: 1613 [2021-06-12 20:06:43,108 INFO L226 Difference]: Without dead ends: 1589 [2021-06-12 20:06:43,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-12 20:06:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1318. [2021-06-12 20:06:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.3143507972665147) internal successors, (4365), 1317 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4365 transitions. [2021-06-12 20:06:43,122 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4365 transitions. Word has length 25 [2021-06-12 20:06:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:43,122 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4365 transitions. [2021-06-12 20:06:43,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4365 transitions. [2021-06-12 20:06:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:43,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:43,123 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:43,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4437,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:43,324 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash -904296497, now seen corresponding path program 522 times [2021-06-12 20:06:43,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:43,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328879022] [2021-06-12 20:06:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:43,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:43,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328879022] [2021-06-12 20:06:43,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328879022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:43,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434457625] [2021-06-12 20:06:43,427 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 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 20:06:43,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:43,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:43,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:43,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,562 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 20:06:43,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,566 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 17 treesize of output 13 [2021-06-12 20:06:43,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,569 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 18 treesize of output 14 [2021-06-12 20:06:43,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:43,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:43,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:06:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,775 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 18 treesize of output 14 [2021-06-12 20:06:43,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:43,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,961 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2021-06-12 20:06:43,961 INFO L628 ElimStorePlain]: treesize reduction 165, result has 52.4 percent of original size [2021-06-12 20:06:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:43,966 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 19 treesize of output 15 [2021-06-12 20:06:43,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:43,970 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 7 treesize of output 5 [2021-06-12 20:06:43,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,065 INFO L628 ElimStorePlain]: treesize reduction 29, result has 81.5 percent of original size [2021-06-12 20:06:44,068 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 8 treesize of output 6 [2021-06-12 20:06:44,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,112 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1836 vanished before elimination [2021-06-12 20:06:44,115 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 20:06:44,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:44,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:44,156 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:44,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1838 vanished before elimination [2021-06-12 20:06:44,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1840 vanished before elimination [2021-06-12 20:06:44,158 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 20:06:44,158 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:361, output treesize:56 [2021-06-12 20:06:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434457625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176814277] [2021-06-12 20:06:44,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:44,224 INFO L87 Difference]: Start difference. First operand 1318 states and 4365 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 20:06:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:44,619 INFO L93 Difference]: Finished difference Result 1557 states and 4986 transitions. [2021-06-12 20:06:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:44,620 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 25 [2021-06-12 20:06:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:44,626 INFO L225 Difference]: With dead ends: 1557 [2021-06-12 20:06:44,627 INFO L226 Difference]: Without dead ends: 1525 [2021-06-12 20:06:44,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-12 20:06:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1343. [2021-06-12 20:06:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.3099850968703426) internal successors, (4442), 1342 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4442 transitions. [2021-06-12 20:06:44,640 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4442 transitions. Word has length 25 [2021-06-12 20:06:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:44,640 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4442 transitions. [2021-06-12 20:06:44,640 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 20:06:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4442 transitions. [2021-06-12 20:06:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:44,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:44,641 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:44,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4457,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:44,841 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1134655147, now seen corresponding path program 523 times [2021-06-12 20:06:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:44,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563134963] [2021-06-12 20:06:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:44,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:44,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563134963] [2021-06-12 20:06:44,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563134963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:44,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60236697] [2021-06-12 20:06:44,947 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 20:06:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:45,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,084 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 20:06:45,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,088 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 18 treesize of output 14 [2021-06-12 20:06:45,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:45,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:45,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:45,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:45,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-12 20:06:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,302 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 17 treesize of output 13 [2021-06-12 20:06:45,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,306 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 18 treesize of output 14 [2021-06-12 20:06:45,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,488 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2021-06-12 20:06:45,489 INFO L628 ElimStorePlain]: treesize reduction 163, result has 53.0 percent of original size [2021-06-12 20:06:45,492 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 10 treesize of output 8 [2021-06-12 20:06:45,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:45,558 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1847 vanished before elimination [2021-06-12 20:06:45,558 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:45,562 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 7 treesize of output 5 [2021-06-12 20:06:45,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:45,566 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 20:06:45,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,660 INFO L628 ElimStorePlain]: treesize reduction 29, result has 80.5 percent of original size [2021-06-12 20:06:45,663 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 20:06:45,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:45,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:45,705 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1850 vanished before elimination [2021-06-12 20:06:45,705 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1852 vanished before elimination [2021-06-12 20:06:45,707 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 20:06:45,707 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:361, output treesize:56 [2021-06-12 20:06:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:45,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60236697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:45,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:45,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610181494] [2021-06-12 20:06:45,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:45,797 INFO L87 Difference]: Start difference. First operand 1343 states and 4442 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 20:06:46,140 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-12 20:06:46,330 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-12 20:06:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:46,428 INFO L93 Difference]: Finished difference Result 1685 states and 5326 transitions. [2021-06-12 20:06:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:06:46,428 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 25 [2021-06-12 20:06:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:46,430 INFO L225 Difference]: With dead ends: 1685 [2021-06-12 20:06:46,430 INFO L226 Difference]: Without dead ends: 1671 [2021-06-12 20:06:46,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 615.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-12 20:06:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1355. [2021-06-12 20:06:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.310192023633678) internal successors, (4482), 1354 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4482 transitions. [2021-06-12 20:06:46,445 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4482 transitions. Word has length 25 [2021-06-12 20:06:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:46,446 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4482 transitions. [2021-06-12 20:06:46,446 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 20:06:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4482 transitions. [2021-06-12 20:06:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:46,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:46,447 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:46,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4471,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:46,648 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:46,648 INFO L82 PathProgramCache]: Analyzing trace with hash -698004247, now seen corresponding path program 524 times [2021-06-12 20:06:46,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:46,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488412807] [2021-06-12 20:06:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:46,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:46,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488412807] [2021-06-12 20:06:46,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488412807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:46,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70377073] [2021-06-12 20:06:46,729 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 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 20:06:46,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,849 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 15 treesize of output 11 [2021-06-12 20:06:46,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,852 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 16 treesize of output 12 [2021-06-12 20:06:46,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,856 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 16 treesize of output 12 [2021-06-12 20:06:46,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:46,859 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 20:06:46,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:46,940 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:46,945 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 20:06:46,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:47,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70377073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:47,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:47,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:47,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086372853] [2021-06-12 20:06:47,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:47,148 INFO L87 Difference]: Start difference. First operand 1355 states and 4482 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 20:06:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:47,550 INFO L93 Difference]: Finished difference Result 1738 states and 5487 transitions. [2021-06-12 20:06:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:06:47,551 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 25 [2021-06-12 20:06:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:47,553 INFO L225 Difference]: With dead ends: 1738 [2021-06-12 20:06:47,553 INFO L226 Difference]: Without dead ends: 1738 [2021-06-12 20:06:47,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-12 20:06:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1352. [2021-06-12 20:06:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.307920059215396) internal successors, (4469), 1351 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4469 transitions. [2021-06-12 20:06:47,568 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4469 transitions. Word has length 25 [2021-06-12 20:06:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:47,568 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4469 transitions. [2021-06-12 20:06:47,568 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 20:06:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4469 transitions. [2021-06-12 20:06:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:47,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:47,570 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:47,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4485 [2021-06-12 20:06:47,770 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1576330295, now seen corresponding path program 525 times [2021-06-12 20:06:47,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:47,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899023044] [2021-06-12 20:06:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:47,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899023044] [2021-06-12 20:06:47,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899023044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258508532] [2021-06-12 20:06:47,877 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 20:06:47,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:06:47,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,020 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 16 treesize of output 12 [2021-06-12 20:06:48,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,024 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 15 treesize of output 11 [2021-06-12 20:06:48,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:48,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,031 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 16 treesize of output 12 [2021-06-12 20:06:48,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,128 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:48,134 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 20:06:48,134 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-12 20:06:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,262 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 17 treesize of output 13 [2021-06-12 20:06:48,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:48,267 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 16 treesize of output 12 [2021-06-12 20:06:48,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,358 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:06:48,358 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:48,361 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 8 treesize of output 6 [2021-06-12 20:06:48,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1861 vanished before elimination [2021-06-12 20:06:48,395 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 7 treesize of output 5 [2021-06-12 20:06:48,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:48,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:48,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1863 vanished before elimination [2021-06-12 20:06:48,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:48,426 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:32 [2021-06-12 20:06:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:48,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258508532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:48,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:48,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:48,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947053896] [2021-06-12 20:06:48,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:48,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:48,489 INFO L87 Difference]: Start difference. First operand 1352 states and 4469 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 20:06:48,731 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-12 20:06:48,860 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-12 20:06:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:49,065 INFO L93 Difference]: Finished difference Result 1588 states and 5104 transitions. [2021-06-12 20:06:49,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:49,065 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 25 [2021-06-12 20:06:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:49,067 INFO L225 Difference]: With dead ends: 1588 [2021-06-12 20:06:49,067 INFO L226 Difference]: Without dead ends: 1588 [2021-06-12 20:06:49,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:06:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-12 20:06:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1352. [2021-06-12 20:06:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.307920059215396) internal successors, (4469), 1351 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4469 transitions. [2021-06-12 20:06:49,082 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4469 transitions. Word has length 25 [2021-06-12 20:06:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:49,082 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4469 transitions. [2021-06-12 20:06:49,082 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 20:06:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4469 transitions. [2021-06-12 20:06:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:49,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:49,083 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:49,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4500 [2021-06-12 20:06:49,284 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1576674867, now seen corresponding path program 526 times [2021-06-12 20:06:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:49,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28201546] [2021-06-12 20:06:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:49,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28201546] [2021-06-12 20:06:49,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28201546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856762265] [2021-06-12 20:06:49,364 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 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 20:06:49,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:49,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:49,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:49,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,489 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 20:06:49,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,508 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 15 treesize of output 11 [2021-06-12 20:06:49,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:49,511 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 16 treesize of output 12 [2021-06-12 20:06:49,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:49,592 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:49,597 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 20:06:49,597 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:49,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856762265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:49,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:49,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:49,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645435196] [2021-06-12 20:06:49,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:49,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:49,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:49,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:49,789 INFO L87 Difference]: Start difference. First operand 1352 states and 4469 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 20:06:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:50,040 INFO L93 Difference]: Finished difference Result 1585 states and 5097 transitions. [2021-06-12 20:06:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:06:50,041 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 25 [2021-06-12 20:06:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:50,043 INFO L225 Difference]: With dead ends: 1585 [2021-06-12 20:06:50,043 INFO L226 Difference]: Without dead ends: 1570 [2021-06-12 20:06:50,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:06:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-06-12 20:06:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1345. [2021-06-12 20:06:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.3043154761904763) internal successors, (4441), 1344 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4441 transitions. [2021-06-12 20:06:50,057 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4441 transitions. Word has length 25 [2021-06-12 20:06:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:50,057 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4441 transitions. [2021-06-12 20:06:50,057 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 20:06:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4441 transitions. [2021-06-12 20:06:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:50,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:50,059 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:50,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4516,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:50,259 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1402438125, now seen corresponding path program 527 times [2021-06-12 20:06:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:50,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338605607] [2021-06-12 20:06:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:50,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:50,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338605607] [2021-06-12 20:06:50,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338605607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:50,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477267680] [2021-06-12 20:06:50,383 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 20:06:50,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:06:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,555 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 20:06:50,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,559 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 15 treesize of output 11 [2021-06-12 20:06:50,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,563 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 16 treesize of output 12 [2021-06-12 20:06:50,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,566 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 16 treesize of output 12 [2021-06-12 20:06:50,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,663 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:50,669 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 20:06:50,669 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-12 20:06:50,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,796 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 16 treesize of output 12 [2021-06-12 20:06:50,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:50,800 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 17 treesize of output 13 [2021-06-12 20:06:50,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,890 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:06:50,891 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:50,893 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 7 treesize of output 5 [2021-06-12 20:06:50,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,927 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 8 treesize of output 6 [2021-06-12 20:06:50,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:50,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:50,957 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1874 vanished before elimination [2021-06-12 20:06:50,957 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1876 vanished before elimination [2021-06-12 20:06:50,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:50,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-12 20:06:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:51,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477267680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:51,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:51,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:51,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084414610] [2021-06-12 20:06:51,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:51,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:51,021 INFO L87 Difference]: Start difference. First operand 1345 states and 4441 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 20:06:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:51,653 INFO L93 Difference]: Finished difference Result 1513 states and 4869 transitions. [2021-06-12 20:06:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:51,654 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 25 [2021-06-12 20:06:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:51,655 INFO L225 Difference]: With dead ends: 1513 [2021-06-12 20:06:51,655 INFO L226 Difference]: Without dead ends: 1489 [2021-06-12 20:06:51,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:06:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-06-12 20:06:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1327. [2021-06-12 20:06:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.306184012066365) internal successors, (4384), 1326 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4384 transitions. [2021-06-12 20:06:51,669 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4384 transitions. Word has length 25 [2021-06-12 20:06:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:51,669 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4384 transitions. [2021-06-12 20:06:51,669 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 20:06:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4384 transitions. [2021-06-12 20:06:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:51,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:51,670 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:51,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:51,871 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:51,871 INFO L82 PathProgramCache]: Analyzing trace with hash 522164589, now seen corresponding path program 528 times [2021-06-12 20:06:51,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:51,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755994149] [2021-06-12 20:06:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:51,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:51,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755994149] [2021-06-12 20:06:51,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755994149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:51,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730489840] [2021-06-12 20:06:51,971 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 20:06:52,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:52,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:52,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:52,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,112 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 16 treesize of output 12 [2021-06-12 20:06:52,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:52,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,119 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 15 treesize of output 11 [2021-06-12 20:06:52,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,216 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:52,221 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 20:06:52,221 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-12 20:06:52,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,350 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 17 treesize of output 13 [2021-06-12 20:06:52,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:52,354 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 16 treesize of output 12 [2021-06-12 20:06:52,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,444 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:06:52,444 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:06:52,447 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 7 treesize of output 5 [2021-06-12 20:06:52,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1881 vanished before elimination [2021-06-12 20:06:52,481 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 8 treesize of output 6 [2021-06-12 20:06:52,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:52,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:52,511 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1883 vanished before elimination [2021-06-12 20:06:52,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:06:52,512 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-12 20:06:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:52,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730489840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:52,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:52,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:06:52,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41378411] [2021-06-12 20:06:52,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:06:52,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:52,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:06:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:06:52,580 INFO L87 Difference]: Start difference. First operand 1327 states and 4384 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 20:06:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:53,091 INFO L93 Difference]: Finished difference Result 1441 states and 4708 transitions. [2021-06-12 20:06:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:06:53,092 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 25 [2021-06-12 20:06:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:53,093 INFO L225 Difference]: With dead ends: 1441 [2021-06-12 20:06:53,093 INFO L226 Difference]: Without dead ends: 1441 [2021-06-12 20:06:53,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-06-12 20:06:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1311. [2021-06-12 20:06:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.3053435114503817) internal successors, (4330), 1310 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4330 transitions. [2021-06-12 20:06:53,106 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4330 transitions. Word has length 25 [2021-06-12 20:06:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:53,106 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4330 transitions. [2021-06-12 20:06:53,106 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 20:06:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4330 transitions. [2021-06-12 20:06:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:53,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:53,107 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:53,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4545,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:53,308 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1757182011, now seen corresponding path program 529 times [2021-06-12 20:06:53,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:53,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48317293] [2021-06-12 20:06:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:53,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:53,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48317293] [2021-06-12 20:06:53,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48317293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:53,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378134938] [2021-06-12 20:06:53,378 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 20:06:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:53,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,500 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 17 treesize of output 13 [2021-06-12 20:06:53,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,503 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 16 treesize of output 12 [2021-06-12 20:06:53,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,507 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 15 treesize of output 11 [2021-06-12 20:06:53,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:53,510 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 16 treesize of output 12 [2021-06-12 20:06:53,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:53,592 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:53,598 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 20:06:53,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:53,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378134938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:53,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:53,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:53,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668170230] [2021-06-12 20:06:53,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:53,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:53,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:53,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:53,783 INFO L87 Difference]: Start difference. First operand 1311 states and 4330 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 20:06:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:54,235 INFO L93 Difference]: Finished difference Result 1490 states and 4791 transitions. [2021-06-12 20:06:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:54,235 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 25 [2021-06-12 20:06:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:54,237 INFO L225 Difference]: With dead ends: 1490 [2021-06-12 20:06:54,237 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 20:06:54,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:06:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 20:06:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1323. [2021-06-12 20:06:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.2950075642965206) internal successors, (4356), 1322 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4356 transitions. [2021-06-12 20:06:54,250 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4356 transitions. Word has length 25 [2021-06-12 20:06:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:54,250 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4356 transitions. [2021-06-12 20:06:54,250 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 20:06:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4356 transitions. [2021-06-12 20:06:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:54,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:54,252 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:54,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4557,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:54,452 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1090960443, now seen corresponding path program 530 times [2021-06-12 20:06:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:54,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307326225] [2021-06-12 20:06:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:54,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307326225] [2021-06-12 20:06:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307326225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521958941] [2021-06-12 20:06:54,530 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 20:06:54,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:06:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:54,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:54,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,657 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 16 treesize of output 12 [2021-06-12 20:06:54,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,661 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 16 treesize of output 12 [2021-06-12 20:06:54,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,664 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 17 treesize of output 13 [2021-06-12 20:06:54,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:54,667 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 15 treesize of output 11 [2021-06-12 20:06:54,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:54,749 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:54,754 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 20:06:54,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:06:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:06:54,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521958941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:54,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:54,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:06:54,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055454806] [2021-06-12 20:06:54,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:06:54,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:54,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:06:54,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:06:54,933 INFO L87 Difference]: Start difference. First operand 1323 states and 4356 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 20:06:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:55,232 INFO L93 Difference]: Finished difference Result 1434 states and 4672 transitions. [2021-06-12 20:06:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:55,232 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 25 [2021-06-12 20:06:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:55,234 INFO L225 Difference]: With dead ends: 1434 [2021-06-12 20:06:55,234 INFO L226 Difference]: Without dead ends: 1417 [2021-06-12 20:06:55,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:06:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-12 20:06:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1309. [2021-06-12 20:06:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.305045871559633) internal successors, (4323), 1308 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4323 transitions. [2021-06-12 20:06:55,246 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4323 transitions. Word has length 25 [2021-06-12 20:06:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:55,246 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4323 transitions. [2021-06-12 20:06:55,246 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 20:06:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4323 transitions. [2021-06-12 20:06:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:55,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:55,248 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:55,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4577,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:55,448 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1752079917, now seen corresponding path program 531 times [2021-06-12 20:06:55,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:55,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867772443] [2021-06-12 20:06:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:55,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867772443] [2021-06-12 20:06:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867772443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505531144] [2021-06-12 20:06:55,538 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 20:06:55,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:06:55,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:55,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:55,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:55,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:55,681 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 15 treesize of output 11 [2021-06-12 20:06:55,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:55,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:55,736 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 17 treesize of output 13 [2021-06-12 20:06:55,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:55,819 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:06:55,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:55,822 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:06:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:55,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505531144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:55,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:55,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:55,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030164983] [2021-06-12 20:06:55,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:55,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:55,994 INFO L87 Difference]: Start difference. First operand 1309 states and 4323 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:56,270 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-12 20:06:56,666 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-12 20:06:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:56,718 INFO L93 Difference]: Finished difference Result 1480 states and 4800 transitions. [2021-06-12 20:06:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:06:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:56,720 INFO L225 Difference]: With dead ends: 1480 [2021-06-12 20:06:56,720 INFO L226 Difference]: Without dead ends: 1480 [2021-06-12 20:06:56,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 699.4ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-12 20:06:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1313. [2021-06-12 20:06:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 3.307926829268293) internal successors, (4340), 1312 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4340 transitions. [2021-06-12 20:06:56,733 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4340 transitions. Word has length 25 [2021-06-12 20:06:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:56,733 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 4340 transitions. [2021-06-12 20:06:56,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4340 transitions. [2021-06-12 20:06:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:56,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:56,735 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:56,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:56,935 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:56,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1056412957, now seen corresponding path program 532 times [2021-06-12 20:06:56,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:56,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301660748] [2021-06-12 20:06:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:57,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:57,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301660748] [2021-06-12 20:06:57,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301660748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:57,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355955422] [2021-06-12 20:06:57,029 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 20:06:57,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:06:57,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:57,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:57,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:57,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:06:57,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:57,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:06:57,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,258 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:57,261 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 15 treesize of output 11 [2021-06-12 20:06:57,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:57,264 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 16 treesize of output 12 [2021-06-12 20:06:57,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:57,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:57,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:57,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:06:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:57,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355955422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:57,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:57,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781906605] [2021-06-12 20:06:57,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:57,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:57,462 INFO L87 Difference]: Start difference. First operand 1313 states and 4340 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:57,732 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-12 20:06:58,127 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-12 20:06:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:58,218 INFO L93 Difference]: Finished difference Result 1465 states and 4746 transitions. [2021-06-12 20:06:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:06:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:58,220 INFO L225 Difference]: With dead ends: 1465 [2021-06-12 20:06:58,220 INFO L226 Difference]: Without dead ends: 1459 [2021-06-12 20:06:58,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:06:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-12 20:06:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1312. [2021-06-12 20:06:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.3066361556064074) internal successors, (4335), 1311 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4335 transitions. [2021-06-12 20:06:58,233 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4335 transitions. Word has length 25 [2021-06-12 20:06:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:58,233 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4335 transitions. [2021-06-12 20:06:58,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4335 transitions. [2021-06-12 20:06:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:58,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:58,234 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:58,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4614,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:58,435 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:58,435 INFO L82 PathProgramCache]: Analyzing trace with hash -4365133, now seen corresponding path program 533 times [2021-06-12 20:06:58,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:58,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769134006] [2021-06-12 20:06:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:58,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769134006] [2021-06-12 20:06:58,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769134006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562204713] [2021-06-12 20:06:58,514 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 20:06:58,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:06:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:06:58,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:06:58,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:58,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:58,666 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 16 treesize of output 12 [2021-06-12 20:06:58,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:58,669 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 17 treesize of output 13 [2021-06-12 20:06:58,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,761 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:06:58,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:58,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:58,764 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 15 treesize of output 11 [2021-06-12 20:06:58,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:06:58,767 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 16 treesize of output 12 [2021-06-12 20:06:58,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:06:58,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:06:58,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:06:58,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:06:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:58,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562204713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:58,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:06:58,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:06:58,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477352746] [2021-06-12 20:06:58,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:06:58,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:06:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:06:58,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:06:58,965 INFO L87 Difference]: Start difference. First operand 1312 states and 4335 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:06:59,562 INFO L93 Difference]: Finished difference Result 1384 states and 4533 transitions. [2021-06-12 20:06:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:06:59,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:06:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:06:59,564 INFO L225 Difference]: With dead ends: 1384 [2021-06-12 20:06:59,564 INFO L226 Difference]: Without dead ends: 1372 [2021-06-12 20:06:59,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:06:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-12 20:06:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1309. [2021-06-12 20:06:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.305045871559633) internal successors, (4323), 1308 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:06:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4323 transitions. [2021-06-12 20:06:59,576 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4323 transitions. Word has length 25 [2021-06-12 20:06:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:06:59,576 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4323 transitions. [2021-06-12 20:06:59,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:06:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4323 transitions. [2021-06-12 20:06:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:06:59,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:06:59,577 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:06:59,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:06:59,778 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:06:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:06:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 910784013, now seen corresponding path program 534 times [2021-06-12 20:06:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:06:59,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656612832] [2021-06-12 20:06:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:06:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:06:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:06:59,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:06:59,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656612832] [2021-06-12 20:06:59,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656612832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:06:59,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657522037] [2021-06-12 20:06:59,876 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 20:06:59,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:06:59,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:06:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:06:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:00,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:00,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:00,008 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 20:07:00,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:00,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:00,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:00,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:00,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:00,074 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 18 treesize of output 14 [2021-06-12 20:07:00,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:00,077 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 17 treesize of output 13 [2021-06-12 20:07:00,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:00,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:00,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:00,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657522037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:00,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:00,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:00,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53182979] [2021-06-12 20:07:00,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:00,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:00,264 INFO L87 Difference]: Start difference. First operand 1309 states and 4323 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 20:07:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:00,773 INFO L93 Difference]: Finished difference Result 1421 states and 4588 transitions. [2021-06-12 20:07:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:07:00,773 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 25 [2021-06-12 20:07:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:00,775 INFO L225 Difference]: With dead ends: 1421 [2021-06-12 20:07:00,775 INFO L226 Difference]: Without dead ends: 1407 [2021-06-12 20:07:00,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-12 20:07:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1332. [2021-06-12 20:07:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.2945154019534186) internal successors, (4385), 1331 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4385 transitions. [2021-06-12 20:07:00,788 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4385 transitions. Word has length 25 [2021-06-12 20:07:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:00,788 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4385 transitions. [2021-06-12 20:07:00,788 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 20:07:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4385 transitions. [2021-06-12 20:07:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:00,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:00,789 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:00,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4644,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:00,989 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash -827187803, now seen corresponding path program 535 times [2021-06-12 20:07:00,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:00,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842768230] [2021-06-12 20:07:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:01,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:01,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842768230] [2021-06-12 20:07:01,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842768230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:01,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550426005] [2021-06-12 20:07:01,073 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 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 20:07:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:01,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:01,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:01,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:01,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:01,268 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 18 treesize of output 14 [2021-06-12 20:07:01,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:01,271 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 17 treesize of output 13 [2021-06-12 20:07:01,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:01,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:01,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:01,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:01,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550426005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:01,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:01,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:01,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443150537] [2021-06-12 20:07:01,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:01,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:01,460 INFO L87 Difference]: Start difference. First operand 1332 states and 4385 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 20:07:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:01,951 INFO L93 Difference]: Finished difference Result 1413 states and 4574 transitions. [2021-06-12 20:07:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:01,951 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 25 [2021-06-12 20:07:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:01,953 INFO L225 Difference]: With dead ends: 1413 [2021-06-12 20:07:01,953 INFO L226 Difference]: Without dead ends: 1405 [2021-06-12 20:07:01,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:07:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-12 20:07:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1330. [2021-06-12 20:07:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.294206170052671) internal successors, (4378), 1329 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4378 transitions. [2021-06-12 20:07:01,965 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4378 transitions. Word has length 25 [2021-06-12 20:07:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:01,966 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4378 transitions. [2021-06-12 20:07:01,966 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 20:07:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4378 transitions. [2021-06-12 20:07:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:01,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:01,967 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:02,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4655,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:02,167 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1364680659, now seen corresponding path program 536 times [2021-06-12 20:07:02,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:02,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201684826] [2021-06-12 20:07:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:02,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:02,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201684826] [2021-06-12 20:07:02,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201684826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:02,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241401131] [2021-06-12 20:07:02,256 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 20:07:02,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:02,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:02,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:02,391 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 16 treesize of output 12 [2021-06-12 20:07:02,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:02,395 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 17 treesize of output 13 [2021-06-12 20:07:02,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,488 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 20:07:02,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:02,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:02,491 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 16 treesize of output 12 [2021-06-12 20:07:02,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:02,494 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 15 treesize of output 11 [2021-06-12 20:07:02,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:02,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:02,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:02,541 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:111 [2021-06-12 20:07:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:02,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241401131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:02,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:02,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:02,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903686488] [2021-06-12 20:07:02,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:02,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:02,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:02,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:02,701 INFO L87 Difference]: Start difference. First operand 1330 states and 4378 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 20:07:03,073 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-06-12 20:07:03,273 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-12 20:07:03,535 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2021-06-12 20:07:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:03,571 INFO L93 Difference]: Finished difference Result 1380 states and 4510 transitions. [2021-06-12 20:07:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:07:03,571 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 25 [2021-06-12 20:07:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:03,573 INFO L225 Difference]: With dead ends: 1380 [2021-06-12 20:07:03,573 INFO L226 Difference]: Without dead ends: 1366 [2021-06-12 20:07:03,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 868.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-12 20:07:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1328. [2021-06-12 20:07:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.2946495855312734) internal successors, (4372), 1327 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4372 transitions. [2021-06-12 20:07:03,584 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4372 transitions. Word has length 25 [2021-06-12 20:07:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:03,585 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4372 transitions. [2021-06-12 20:07:03,585 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 20:07:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4372 transitions. [2021-06-12 20:07:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:03,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:03,586 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:03,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4666,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:03,786 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1357200683, now seen corresponding path program 537 times [2021-06-12 20:07:03,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:03,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242960188] [2021-06-12 20:07:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:03,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:03,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242960188] [2021-06-12 20:07:03,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242960188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:03,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548683255] [2021-06-12 20:07:03,861 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 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 20:07:03,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:07:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:03,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:04,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,002 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 16 treesize of output 12 [2021-06-12 20:07:04,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,006 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 20:07:04,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,096 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:07:04,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,099 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 15 treesize of output 11 [2021-06-12 20:07:04,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:04,102 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 16 treesize of output 12 [2021-06-12 20:07:04,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:04,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:04,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:04,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:04,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548683255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:04,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:04,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:04,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160726737] [2021-06-12 20:07:04,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:04,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:04,309 INFO L87 Difference]: Start difference. First operand 1328 states and 4372 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:04,862 INFO L93 Difference]: Finished difference Result 1676 states and 5311 transitions. [2021-06-12 20:07:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:07:04,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:04,865 INFO L225 Difference]: With dead ends: 1676 [2021-06-12 20:07:04,865 INFO L226 Difference]: Without dead ends: 1652 [2021-06-12 20:07:04,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-06-12 20:07:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1345. [2021-06-12 20:07:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.3072916666666665) internal successors, (4445), 1344 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4445 transitions. [2021-06-12 20:07:04,879 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4445 transitions. Word has length 25 [2021-06-12 20:07:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:04,879 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4445 transitions. [2021-06-12 20:07:04,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4445 transitions. [2021-06-12 20:07:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:04,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:04,881 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:05,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4678 [2021-06-12 20:07:05,081 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:05,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:05,081 INFO L82 PathProgramCache]: Analyzing trace with hash 148298273, now seen corresponding path program 538 times [2021-06-12 20:07:05,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:05,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859027315] [2021-06-12 20:07:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:05,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859027315] [2021-06-12 20:07:05,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859027315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205708336] [2021-06-12 20:07:05,170 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 20:07:05,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:05,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:05,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,307 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 15 treesize of output 11 [2021-06-12 20:07:05,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,310 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 16 treesize of output 12 [2021-06-12 20:07:05,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:05,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,361 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 20:07:05,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:05,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:05,445 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:07:05,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:05,447 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:05,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205708336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:05,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:05,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:05,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316814359] [2021-06-12 20:07:05,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:05,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:05,605 INFO L87 Difference]: Start difference. First operand 1345 states and 4445 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 20:07:05,857 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-12 20:07:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:06,074 INFO L93 Difference]: Finished difference Result 1725 states and 5477 transitions. [2021-06-12 20:07:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:06,074 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 25 [2021-06-12 20:07:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:06,076 INFO L225 Difference]: With dead ends: 1725 [2021-06-12 20:07:06,076 INFO L226 Difference]: Without dead ends: 1725 [2021-06-12 20:07:06,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 496.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-12 20:07:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1337. [2021-06-12 20:07:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.30314371257485) internal successors, (4413), 1336 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4413 transitions. [2021-06-12 20:07:06,091 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4413 transitions. Word has length 25 [2021-06-12 20:07:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:06,091 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4413 transitions. [2021-06-12 20:07:06,091 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 20:07:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4413 transitions. [2021-06-12 20:07:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:06,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:06,093 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:06,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-06-12 20:07:06,293 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1715890105, now seen corresponding path program 539 times [2021-06-12 20:07:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:06,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478653126] [2021-06-12 20:07:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:06,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:06,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478653126] [2021-06-12 20:07:06,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478653126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:06,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746990017] [2021-06-12 20:07:06,390 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 20:07:06,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:06,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:06,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:06,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,518 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 17 treesize of output 13 [2021-06-12 20:07:06,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,521 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 20:07:06,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:06,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,587 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 18 treesize of output 14 [2021-06-12 20:07:06,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:06,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:06,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:06,775 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 20:07:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,779 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 20:07:06,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,784 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 18 treesize of output 14 [2021-06-12 20:07:06,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,788 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 20:07:06,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:06,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,797 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 18 treesize of output 14 [2021-06-12 20:07:06,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,801 INFO L173 IndexEqualityManager]: detected equality via solver [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 19 treesize of output 15 [2021-06-12 20:07:06,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,806 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 20:07:06,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:06,810 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 18 treesize of output 14 [2021-06-12 20:07:06,811 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:06,928 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-12 20:07:06,929 INFO L628 ElimStorePlain]: treesize reduction 178, result has 38.4 percent of original size [2021-06-12 20:07:06,929 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:06,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:06,931 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:53 [2021-06-12 20:07:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:06,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746990017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:06,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:06,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468124139] [2021-06-12 20:07:06,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:06,996 INFO L87 Difference]: Start difference. First operand 1337 states and 4413 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 20:07:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:07,562 INFO L93 Difference]: Finished difference Result 1587 states and 5019 transitions. [2021-06-12 20:07:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:07,563 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 25 [2021-06-12 20:07:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:07,565 INFO L225 Difference]: With dead ends: 1587 [2021-06-12 20:07:07,565 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 20:07:07,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 20:07:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1362. [2021-06-12 20:07:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.299044819985305) internal successors, (4490), 1361 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4490 transitions. [2021-06-12 20:07:07,580 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4490 transitions. Word has length 25 [2021-06-12 20:07:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:07,580 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4490 transitions. [2021-06-12 20:07:07,580 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 20:07:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4490 transitions. [2021-06-12 20:07:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:07,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:07,581 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:07,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4707,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:07,781 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:07,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1946248755, now seen corresponding path program 540 times [2021-06-12 20:07:07,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:07,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373768172] [2021-06-12 20:07:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:07,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373768172] [2021-06-12 20:07:07,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373768172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263585064] [2021-06-12 20:07:07,881 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 20:07:07,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:07:07,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,009 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 20:07:08,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,012 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 18 treesize of output 14 [2021-06-12 20:07:08,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:08,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,079 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 20:07:08,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:08,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:08,136 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:08,246 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 20:07:08,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,250 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 18 treesize of output 14 [2021-06-12 20:07:08,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,254 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 19 treesize of output 15 [2021-06-12 20:07:08,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,259 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 17 treesize of output 13 [2021-06-12 20:07:08,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,263 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 20:07:08,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,267 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 18 treesize of output 14 [2021-06-12 20:07:08,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,272 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 17 treesize of output 13 [2021-06-12 20:07:08,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,276 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 18 treesize of output 14 [2021-06-12 20:07:08,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:08,280 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 18 treesize of output 14 [2021-06-12 20:07:08,280 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:08,396 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-06-12 20:07:08,396 INFO L628 ElimStorePlain]: treesize reduction 178, result has 38.4 percent of original size [2021-06-12 20:07:08,396 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:08,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:08,398 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:53 [2021-06-12 20:07:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:08,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263585064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:08,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:08,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915240491] [2021-06-12 20:07:08,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:08,485 INFO L87 Difference]: Start difference. First operand 1362 states and 4490 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 20:07:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:09,024 INFO L93 Difference]: Finished difference Result 1634 states and 5159 transitions. [2021-06-12 20:07:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:09,024 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 25 [2021-06-12 20:07:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:09,026 INFO L225 Difference]: With dead ends: 1634 [2021-06-12 20:07:09,026 INFO L226 Difference]: Without dead ends: 1620 [2021-06-12 20:07:09,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-12 20:07:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1360. [2021-06-12 20:07:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3053715967623254) internal successors, (4492), 1359 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4492 transitions. [2021-06-12 20:07:09,047 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4492 transitions. Word has length 25 [2021-06-12 20:07:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:09,047 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4492 transitions. [2021-06-12 20:07:09,047 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 20:07:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4492 transitions. [2021-06-12 20:07:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:09,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:09,048 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4727 [2021-06-12 20:07:09,249 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash 970266145, now seen corresponding path program 541 times [2021-06-12 20:07:09,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:09,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331318932] [2021-06-12 20:07:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:09,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:09,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331318932] [2021-06-12 20:07:09,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331318932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:09,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523656582] [2021-06-12 20:07:09,330 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 20:07:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:09,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,465 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 16 treesize of output 12 [2021-06-12 20:07:09,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,468 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 17 treesize of output 13 [2021-06-12 20:07:09,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,560 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:07:09,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,563 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 16 treesize of output 12 [2021-06-12 20:07:09,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:09,566 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 15 treesize of output 11 [2021-06-12 20:07:09,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:09,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:09,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:09,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:09,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523656582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:09,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:09,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796552325] [2021-06-12 20:07:09,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:09,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:09,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:09,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:09,768 INFO L87 Difference]: Start difference. First operand 1360 states and 4492 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 20:07:10,047 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 20:07:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:10,226 INFO L93 Difference]: Finished difference Result 1607 states and 5147 transitions. [2021-06-12 20:07:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:10,226 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 25 [2021-06-12 20:07:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:10,228 INFO L225 Difference]: With dead ends: 1607 [2021-06-12 20:07:10,228 INFO L226 Difference]: Without dead ends: 1607 [2021-06-12 20:07:10,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:07:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-12 20:07:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1356. [2021-06-12 20:07:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3011070110701106) internal successors, (4473), 1355 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4473 transitions. [2021-06-12 20:07:10,242 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4473 transitions. Word has length 25 [2021-06-12 20:07:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:10,242 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4473 transitions. [2021-06-12 20:07:10,242 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 20:07:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4473 transitions. [2021-06-12 20:07:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:10,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:10,244 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4737,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:10,444 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:10,444 INFO L82 PathProgramCache]: Analyzing trace with hash 764736687, now seen corresponding path program 542 times [2021-06-12 20:07:10,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992265948] [2021-06-12 20:07:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:10,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:10,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992265948] [2021-06-12 20:07:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992265948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:10,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147215177] [2021-06-12 20:07:10,544 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 20:07:10,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:10,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,672 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 18 treesize of output 14 [2021-06-12 20:07:10,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,676 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 20:07:10,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:10,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,742 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 17 treesize of output 13 [2021-06-12 20:07:10,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:10,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:10,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:10,928 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 20:07:10,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:07:10,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:10,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,941 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 19 treesize of output 15 [2021-06-12 20:07:10,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,946 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 18 treesize of output 14 [2021-06-12 20:07:10,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:10,951 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,954 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 18 treesize of output 14 [2021-06-12 20:07:10,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,959 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 17 treesize of output 13 [2021-06-12 20:07:10,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:10,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:10,963 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 17 treesize of output 13 [2021-06-12 20:07:10,963 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:11,080 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-12 20:07:11,080 INFO L628 ElimStorePlain]: treesize reduction 176, result has 38.7 percent of original size [2021-06-12 20:07:11,081 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:11,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:11,083 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:56 [2021-06-12 20:07:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:11,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147215177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:11,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:11,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:07:11,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509309118] [2021-06-12 20:07:11,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:11,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:11,181 INFO L87 Difference]: Start difference. First operand 1356 states and 4473 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 20:07:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:11,582 INFO L93 Difference]: Finished difference Result 1544 states and 4961 transitions. [2021-06-12 20:07:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:11,582 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 25 [2021-06-12 20:07:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:11,584 INFO L225 Difference]: With dead ends: 1544 [2021-06-12 20:07:11,584 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 20:07:11,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 20:07:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1349. [2021-06-12 20:07:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3026706231454006) internal successors, (4452), 1348 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4452 transitions. [2021-06-12 20:07:11,598 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4452 transitions. Word has length 25 [2021-06-12 20:07:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:11,598 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4452 transitions. [2021-06-12 20:07:11,598 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 20:07:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4452 transitions. [2021-06-12 20:07:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:11,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:11,599 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:11,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4758 [2021-06-12 20:07:11,800 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 590844517, now seen corresponding path program 543 times [2021-06-12 20:07:11,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:11,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054839386] [2021-06-12 20:07:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:11,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054839386] [2021-06-12 20:07:11,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054839386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129911872] [2021-06-12 20:07:11,891 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 20:07:11,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:11,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:11,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:12,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,020 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 17 treesize of output 13 [2021-06-12 20:07:12,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,024 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 16 treesize of output 12 [2021-06-12 20:07:12,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,126 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 20:07:12,127 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 20:07:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,130 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 16 treesize of output 12 [2021-06-12 20:07:12,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,133 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 15 treesize of output 11 [2021-06-12 20:07:12,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:12,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:12,197 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:111 [2021-06-12 20:07:12,325 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 6=[o_2]} [2021-06-12 20:07:12,329 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 7 treesize of output 5 [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 20:07:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,333 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 17 treesize of output 13 [2021-06-12 20:07:12,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,338 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 16 treesize of output 12 [2021-06-12 20:07:12,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:12,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:12,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,349 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 8 treesize of output 6 [2021-06-12 20:07:12,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,353 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 16 treesize of output 12 [2021-06-12 20:07:12,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:12,357 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 16 treesize of output 12 [2021-06-12 20:07:12,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:12,445 INFO L628 ElimStorePlain]: treesize reduction 121, result has 41.8 percent of original size [2021-06-12 20:07:12,446 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:12,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:12,447 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:283, output treesize:35 [2021-06-12 20:07:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:12,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129911872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:12,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:12,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:12,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140410070] [2021-06-12 20:07:12,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:12,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:12,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:12,502 INFO L87 Difference]: Start difference. First operand 1349 states and 4452 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 20:07:12,862 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-12 20:07:13,293 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-12 20:07:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:13,450 INFO L93 Difference]: Finished difference Result 1701 states and 5320 transitions. [2021-06-12 20:07:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:07:13,451 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 25 [2021-06-12 20:07:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:13,453 INFO L225 Difference]: With dead ends: 1701 [2021-06-12 20:07:13,453 INFO L226 Difference]: Without dead ends: 1671 [2021-06-12 20:07:13,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:07:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-12 20:07:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1356. [2021-06-12 20:07:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3055350553505534) internal successors, (4479), 1355 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4479 transitions. [2021-06-12 20:07:13,467 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4479 transitions. Word has length 25 [2021-06-12 20:07:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:13,467 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4479 transitions. [2021-06-12 20:07:13,467 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 20:07:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4479 transitions. [2021-06-12 20:07:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:13,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:13,469 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:13,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4777,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:13,669 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash -289429019, now seen corresponding path program 544 times [2021-06-12 20:07:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:13,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692370684] [2021-06-12 20:07:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:13,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:13,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692370684] [2021-06-12 20:07:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692370684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:13,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112547796] [2021-06-12 20:07:13,774 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 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 20:07:13,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,901 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 18 treesize of output 14 [2021-06-12 20:07:13,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,905 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 20:07:13,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:13,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,969 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 17 treesize of output 13 [2021-06-12 20:07:13,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:13,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:13,973 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 18 treesize of output 14 [2021-06-12 20:07:13,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:14,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:14,030 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:14,170 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-12 20:07:14,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,174 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 18 treesize of output 14 [2021-06-12 20:07:14,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,178 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 19 treesize of output 15 [2021-06-12 20:07:14,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,183 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 20:07:14,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,187 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 18 treesize of output 14 [2021-06-12 20:07:14,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:14,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,196 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 18 treesize of output 14 [2021-06-12 20:07:14,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:14,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:14,204 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 17 treesize of output 13 [2021-06-12 20:07:14,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:14,322 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-12 20:07:14,323 INFO L628 ElimStorePlain]: treesize reduction 180, result has 38.1 percent of original size [2021-06-12 20:07:14,323 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:14,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:14,325 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:53 [2021-06-12 20:07:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112547796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:14,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:14,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:07:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146677788] [2021-06-12 20:07:14,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:14,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:14,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:14,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:14,421 INFO L87 Difference]: Start difference. First operand 1356 states and 4479 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 20:07:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:14,826 INFO L93 Difference]: Finished difference Result 1616 states and 5174 transitions. [2021-06-12 20:07:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:14,826 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 25 [2021-06-12 20:07:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:14,828 INFO L225 Difference]: With dead ends: 1616 [2021-06-12 20:07:14,828 INFO L226 Difference]: Without dead ends: 1616 [2021-06-12 20:07:14,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 494.3ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-12 20:07:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1349. [2021-06-12 20:07:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3026706231454006) internal successors, (4452), 1348 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4452 transitions. [2021-06-12 20:07:14,841 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4452 transitions. Word has length 25 [2021-06-12 20:07:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:14,842 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4452 transitions. [2021-06-12 20:07:14,842 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 20:07:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4452 transitions. [2021-06-12 20:07:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:14,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:14,843 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:15,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4796 [2021-06-12 20:07:15,043 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash 945588403, now seen corresponding path program 545 times [2021-06-12 20:07:15,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:15,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498351579] [2021-06-12 20:07:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:15,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:15,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498351579] [2021-06-12 20:07:15,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498351579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:15,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828448164] [2021-06-12 20:07:15,129 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 20:07:15,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:15,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,275 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 16 treesize of output 12 [2021-06-12 20:07:15,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:15,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,330 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 16 treesize of output 12 [2021-06-12 20:07:15,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:15,334 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 17 treesize of output 13 [2021-06-12 20:07:15,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:15,419 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:07:15,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:15,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:15,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828448164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:15,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:15,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:15,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306707257] [2021-06-12 20:07:15,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:15,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:15,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:15,580 INFO L87 Difference]: Start difference. First operand 1349 states and 4452 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 20:07:15,875 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-12 20:07:16,248 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-12 20:07:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:16,380 INFO L93 Difference]: Finished difference Result 1579 states and 5020 transitions. [2021-06-12 20:07:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:16,380 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 25 [2021-06-12 20:07:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:16,382 INFO L225 Difference]: With dead ends: 1579 [2021-06-12 20:07:16,382 INFO L226 Difference]: Without dead ends: 1553 [2021-06-12 20:07:16,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 756.3ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:07:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-12 20:07:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1361. [2021-06-12 20:07:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2926470588235293) internal successors, (4478), 1360 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4478 transitions. [2021-06-12 20:07:16,396 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4478 transitions. Word has length 25 [2021-06-12 20:07:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:16,396 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4478 transitions. [2021-06-12 20:07:16,396 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 20:07:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4478 transitions. [2021-06-12 20:07:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:16,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:16,398 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:16,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4815,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:16,613 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash 279366835, now seen corresponding path program 546 times [2021-06-12 20:07:16,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:16,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653005144] [2021-06-12 20:07:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:16,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653005144] [2021-06-12 20:07:16,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653005144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975275625] [2021-06-12 20:07:16,688 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 20:07:16,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,836 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 16 treesize of output 12 [2021-06-12 20:07:16,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:16,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,929 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:07:16,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:16,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:16,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:16,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:16,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:16,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:17,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975275625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:17,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:17,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:17,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849936242] [2021-06-12 20:07:17,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:17,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:17,122 INFO L87 Difference]: Start difference. First operand 1361 states and 4478 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 20:07:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:17,583 INFO L93 Difference]: Finished difference Result 1523 states and 4901 transitions. [2021-06-12 20:07:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:17,583 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 25 [2021-06-12 20:07:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:17,585 INFO L225 Difference]: With dead ends: 1523 [2021-06-12 20:07:17,585 INFO L226 Difference]: Without dead ends: 1506 [2021-06-12 20:07:17,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-12 20:07:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1348. [2021-06-12 20:07:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3021529324424646) internal successors, (4448), 1347 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4448 transitions. [2021-06-12 20:07:17,597 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4448 transitions. Word has length 25 [2021-06-12 20:07:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:17,598 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4448 transitions. [2021-06-12 20:07:17,598 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 20:07:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4448 transitions. [2021-06-12 20:07:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:17,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:17,599 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:17,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4831,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:17,799 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:17,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1424615887, now seen corresponding path program 547 times [2021-06-12 20:07:17,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:17,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308570472] [2021-06-12 20:07:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:17,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:17,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308570472] [2021-06-12 20:07:17,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308570472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:17,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837926036] [2021-06-12 20:07:17,910 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 20:07:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:17,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:18,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,040 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 17 treesize of output 13 [2021-06-12 20:07:18,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:18,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,106 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 20:07:18,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:18,109 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 18 treesize of output 14 [2021-06-12 20:07:18,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:18,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:18,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:18,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:18,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837926036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:18,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652168141] [2021-06-12 20:07:18,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:18,323 INFO L87 Difference]: Start difference. First operand 1348 states and 4448 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 20:07:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:18,708 INFO L93 Difference]: Finished difference Result 1390 states and 4560 transitions. [2021-06-12 20:07:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:07:18,709 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 25 [2021-06-12 20:07:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:18,710 INFO L225 Difference]: With dead ends: 1390 [2021-06-12 20:07:18,710 INFO L226 Difference]: Without dead ends: 1378 [2021-06-12 20:07:18,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-12 20:07:18,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1346. [2021-06-12 20:07:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.3026022304832714) internal successors, (4442), 1345 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4442 transitions. [2021-06-12 20:07:18,723 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4442 transitions. Word has length 25 [2021-06-12 20:07:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:18,723 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 4442 transitions. [2021-06-12 20:07:18,723 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 20:07:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4442 transitions. [2021-06-12 20:07:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:18,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:18,724 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:18,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4855 [2021-06-12 20:07:18,925 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash -543714579, now seen corresponding path program 548 times [2021-06-12 20:07:18,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:18,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084399611] [2021-06-12 20:07:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:19,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084399611] [2021-06-12 20:07:19,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084399611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:19,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910589941] [2021-06-12 20:07:19,022 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 20:07:19,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:19,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:19,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:19,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,164 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 18 treesize of output 14 [2021-06-12 20:07:19,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:19,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:19,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,232 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 18 treesize of output 14 [2021-06-12 20:07:19,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,235 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 17 treesize of output 13 [2021-06-12 20:07:19,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:19,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:19,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:19,432 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:07:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,435 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 17 treesize of output 13 [2021-06-12 20:07:19,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,438 INFO L173 IndexEqualityManager]: detected equality via solver [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 18 treesize of output 14 [2021-06-12 20:07:19,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:19,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:19,446 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 17 treesize of output 13 [2021-06-12 20:07:19,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:19,499 INFO L628 ElimStorePlain]: treesize reduction 95, result has 36.2 percent of original size [2021-06-12 20:07:19,499 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:19,500 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 20:07:19,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:173, output treesize:25 [2021-06-12 20:07:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:19,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910589941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:19,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:19,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:19,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299355232] [2021-06-12 20:07:19,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:19,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:19,535 INFO L87 Difference]: Start difference. First operand 1346 states and 4442 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 20:07:19,908 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 20:07:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:20,014 INFO L93 Difference]: Finished difference Result 1469 states and 4744 transitions. [2021-06-12 20:07:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:20,015 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 25 [2021-06-12 20:07:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:20,016 INFO L225 Difference]: With dead ends: 1469 [2021-06-12 20:07:20,016 INFO L226 Difference]: Without dead ends: 1445 [2021-06-12 20:07:20,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-06-12 20:07:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1328. [2021-06-12 20:07:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.3044461190655614) internal successors, (4385), 1327 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4385 transitions. [2021-06-12 20:07:20,035 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4385 transitions. Word has length 25 [2021-06-12 20:07:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:20,035 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4385 transitions. [2021-06-12 20:07:20,035 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 20:07:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4385 transitions. [2021-06-12 20:07:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:20,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:20,036 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:20,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4866,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:20,237 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1423988115, now seen corresponding path program 549 times [2021-06-12 20:07:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:20,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60263131] [2021-06-12 20:07:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:20,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60263131] [2021-06-12 20:07:20,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60263131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216122549] [2021-06-12 20:07:20,348 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 20:07:20,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:07:20,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:20,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,475 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 15 treesize of output 11 [2021-06-12 20:07:20,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,478 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 16 treesize of output 12 [2021-06-12 20:07:20,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:20,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:20,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,536 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 17 treesize of output 13 [2021-06-12 20:07:20,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,624 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:07:20,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:20,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:111 [2021-06-12 20:07:20,751 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-12 20:07:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,754 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 17 treesize of output 13 [2021-06-12 20:07:20,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,757 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 16 treesize of output 12 [2021-06-12 20:07:20,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:20,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:20,764 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 15 treesize of output 11 [2021-06-12 20:07:20,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:20,809 INFO L628 ElimStorePlain]: treesize reduction 69, result has 40.5 percent of original size [2021-06-12 20:07:20,809 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:07:20,810 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 20:07:20,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:153, output treesize:21 [2021-06-12 20:07:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:20,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216122549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:20,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:20,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378793976] [2021-06-12 20:07:20,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:20,839 INFO L87 Difference]: Start difference. First operand 1328 states and 4385 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 20:07:21,090 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-12 20:07:21,250 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-06-12 20:07:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:21,443 INFO L93 Difference]: Finished difference Result 1394 states and 4574 transitions. [2021-06-12 20:07:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:07:21,443 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 25 [2021-06-12 20:07:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:21,445 INFO L225 Difference]: With dead ends: 1394 [2021-06-12 20:07:21,445 INFO L226 Difference]: Without dead ends: 1394 [2021-06-12 20:07:21,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:07:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-12 20:07:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1309. [2021-06-12 20:07:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3042813455657494) internal successors, (4322), 1308 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4322 transitions. [2021-06-12 20:07:21,457 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4322 transitions. Word has length 25 [2021-06-12 20:07:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:21,458 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4322 transitions. [2021-06-12 20:07:21,458 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 20:07:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4322 transitions. [2021-06-12 20:07:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:21,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:21,459 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:21,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4880 [2021-06-12 20:07:21,659 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1000829611, now seen corresponding path program 550 times [2021-06-12 20:07:21,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:21,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287716514] [2021-06-12 20:07:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:21,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:21,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287716514] [2021-06-12 20:07:21,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287716514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:21,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895275455] [2021-06-12 20:07:21,739 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 20:07:21,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:21,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:21,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:21,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,876 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 16 treesize of output 12 [2021-06-12 20:07:21,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,887 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 17 treesize of output 13 [2021-06-12 20:07:21,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:21,978 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:07:21,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:21,981 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 20:07:21,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [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 15 treesize of output 11 [2021-06-12 20:07:21,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:22,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:22,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:22,029 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:22,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895275455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:22,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:22,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:22,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643978163] [2021-06-12 20:07:22,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:22,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:22,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:22,183 INFO L87 Difference]: Start difference. First operand 1309 states and 4322 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:22,498 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 20:07:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:22,832 INFO L93 Difference]: Finished difference Result 1371 states and 4495 transitions. [2021-06-12 20:07:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:22,834 INFO L225 Difference]: With dead ends: 1371 [2021-06-12 20:07:22,834 INFO L226 Difference]: Without dead ends: 1359 [2021-06-12 20:07:22,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-12 20:07:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1311. [2021-06-12 20:07:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.301526717557252) internal successors, (4325), 1310 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4325 transitions. [2021-06-12 20:07:22,845 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4325 transitions. Word has length 25 [2021-06-12 20:07:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:22,845 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4325 transitions. [2021-06-12 20:07:22,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4325 transitions. [2021-06-12 20:07:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:22,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:22,847 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:23,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-06-12 20:07:23,047 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1149079773, now seen corresponding path program 551 times [2021-06-12 20:07:23,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:23,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793697459] [2021-06-12 20:07:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:23,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:23,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793697459] [2021-06-12 20:07:23,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793697459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:23,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078611186] [2021-06-12 20:07:23,123 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 20:07:23,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:07:23,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,260 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 16 treesize of output 12 [2021-06-12 20:07:23,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,263 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 15 treesize of output 11 [2021-06-12 20:07:23,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:23,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:23,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:23,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:23,400 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:07:23,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:23,403 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078611186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:23,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:23,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401956403] [2021-06-12 20:07:23,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:23,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:23,530 INFO L87 Difference]: Start difference. First operand 1311 states and 4325 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 20:07:23,972 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-12 20:07:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:24,105 INFO L93 Difference]: Finished difference Result 1430 states and 4610 transitions. [2021-06-12 20:07:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:24,105 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 25 [2021-06-12 20:07:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:24,107 INFO L225 Difference]: With dead ends: 1430 [2021-06-12 20:07:24,107 INFO L226 Difference]: Without dead ends: 1406 [2021-06-12 20:07:24,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-06-12 20:07:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1323. [2021-06-12 20:07:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.291225416036309) internal successors, (4351), 1322 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4351 transitions. [2021-06-12 20:07:24,119 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4351 transitions. Word has length 25 [2021-06-12 20:07:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:24,119 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4351 transitions. [2021-06-12 20:07:24,119 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 20:07:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4351 transitions. [2021-06-12 20:07:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:24,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:24,121 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:24,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4904 [2021-06-12 20:07:24,321 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1008651613, now seen corresponding path program 552 times [2021-06-12 20:07:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:24,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989115877] [2021-06-12 20:07:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:24,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:24,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989115877] [2021-06-12 20:07:24,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989115877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:24,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960235094] [2021-06-12 20:07:24,390 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 20:07:24,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:24,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:24,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,530 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 16 treesize of output 12 [2021-06-12 20:07:24,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:24,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,631 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:07:24,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:24,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:24,637 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 16 treesize of output 12 [2021-06-12 20:07:24,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:24,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:24,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:24,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-12 20:07:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:24,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960235094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:24,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:24,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271451154] [2021-06-12 20:07:24,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:24,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:24,810 INFO L87 Difference]: Start difference. First operand 1323 states and 4351 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 20:07:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:25,221 INFO L93 Difference]: Finished difference Result 1376 states and 4494 transitions. [2021-06-12 20:07:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:25,222 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 25 [2021-06-12 20:07:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:25,223 INFO L225 Difference]: With dead ends: 1376 [2021-06-12 20:07:25,223 INFO L226 Difference]: Without dead ends: 1357 [2021-06-12 20:07:25,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:07:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-06-12 20:07:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1309. [2021-06-12 20:07:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3035168195718656) internal successors, (4321), 1308 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4321 transitions. [2021-06-12 20:07:25,235 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4321 transitions. Word has length 25 [2021-06-12 20:07:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:25,235 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4321 transitions. [2021-06-12 20:07:25,235 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 20:07:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4321 transitions. [2021-06-12 20:07:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:25,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:25,237 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:25,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4918 [2021-06-12 20:07:25,437 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:25,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1699322605, now seen corresponding path program 553 times [2021-06-12 20:07:25,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:25,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371598401] [2021-06-12 20:07:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:25,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:25,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371598401] [2021-06-12 20:07:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371598401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:25,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128436497] [2021-06-12 20:07:25,498 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 20:07:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:25,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,587 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 16 treesize of output 12 [2021-06-12 20:07:25,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,590 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 17 treesize of output 13 [2021-06-12 20:07:25,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:25,593 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 16 treesize of output 12 [2021-06-12 20:07:25,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:25,637 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:25,639 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 20:07:25,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:25,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128436497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:25,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:25,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:07:25,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737126775] [2021-06-12 20:07:25,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:07:25,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:25,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:07:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:07:25,737 INFO L87 Difference]: Start difference. First operand 1309 states and 4321 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 20:07:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:25,882 INFO L93 Difference]: Finished difference Result 2018 states and 6540 transitions. [2021-06-12 20:07:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 25 [2021-06-12 20:07:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:25,884 INFO L225 Difference]: With dead ends: 2018 [2021-06-12 20:07:25,884 INFO L226 Difference]: Without dead ends: 2018 [2021-06-12 20:07:25,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-06-12 20:07:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1328. [2021-06-12 20:07:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.305199698568199) internal successors, (4386), 1327 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4386 transitions. [2021-06-12 20:07:25,900 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4386 transitions. Word has length 25 [2021-06-12 20:07:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:25,900 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4386 transitions. [2021-06-12 20:07:25,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 20:07:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4386 transitions. [2021-06-12 20:07:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:25,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:25,902 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:26,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4934 [2021-06-12 20:07:26,102 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:26,102 INFO L82 PathProgramCache]: Analyzing trace with hash 493384473, now seen corresponding path program 554 times [2021-06-12 20:07:26,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:26,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947935193] [2021-06-12 20:07:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:26,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:26,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947935193] [2021-06-12 20:07:26,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947935193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:26,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186437292] [2021-06-12 20:07:26,165 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 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 20:07:26,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:26,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,261 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 16 treesize of output 12 [2021-06-12 20:07:26,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,264 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 17 treesize of output 13 [2021-06-12 20:07:26,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,268 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 16 treesize of output 12 [2021-06-12 20:07:26,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:26,271 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 15 treesize of output 11 [2021-06-12 20:07:26,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:26,320 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:26,322 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 20:07:26,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:26,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186437292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:26,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:26,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:26,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895919070] [2021-06-12 20:07:26,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:26,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:26,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:26,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:26,460 INFO L87 Difference]: Start difference. First operand 1328 states and 4386 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 20:07:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:26,677 INFO L93 Difference]: Finished difference Result 1978 states and 6400 transitions. [2021-06-12 20:07:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:26,677 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 25 [2021-06-12 20:07:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:26,680 INFO L225 Difference]: With dead ends: 1978 [2021-06-12 20:07:26,680 INFO L226 Difference]: Without dead ends: 1978 [2021-06-12 20:07:26,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-06-12 20:07:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1343. [2021-06-12 20:07:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.3040238450074515) internal successors, (4434), 1342 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4434 transitions. [2021-06-12 20:07:26,695 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4434 transitions. Word has length 25 [2021-06-12 20:07:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:26,695 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4434 transitions. [2021-06-12 20:07:26,696 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 20:07:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4434 transitions. [2021-06-12 20:07:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:26,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:26,697 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:26,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:26,897 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1244587343, now seen corresponding path program 555 times [2021-06-12 20:07:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:26,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072396463] [2021-06-12 20:07:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:26,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072396463] [2021-06-12 20:07:26,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072396463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932225457] [2021-06-12 20:07:26,962 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 20:07:26,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,041 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 16 treesize of output 12 [2021-06-12 20:07:27,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:27,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,047 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 16 treesize of output 12 [2021-06-12 20:07:27,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:27,050 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 15 treesize of output 11 [2021-06-12 20:07:27,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:27,091 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:27,093 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 20:07:27,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:27,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932225457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:27,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:27,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:27,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528311594] [2021-06-12 20:07:27,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:27,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:27,250 INFO L87 Difference]: Start difference. First operand 1343 states and 4434 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:27,665 INFO L93 Difference]: Finished difference Result 2194 states and 6943 transitions. [2021-06-12 20:07:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:07:27,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:27,667 INFO L225 Difference]: With dead ends: 2194 [2021-06-12 20:07:27,667 INFO L226 Difference]: Without dead ends: 2194 [2021-06-12 20:07:27,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-06-12 20:07:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 1348. [2021-06-12 20:07:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3110616184112844) internal successors, (4460), 1347 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4460 transitions. [2021-06-12 20:07:27,685 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4460 transitions. Word has length 25 [2021-06-12 20:07:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:27,685 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4460 transitions. [2021-06-12 20:07:27,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4460 transitions. [2021-06-12 20:07:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:27,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:27,686 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:27,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4956 [2021-06-12 20:07:27,887 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1563905531, now seen corresponding path program 556 times [2021-06-12 20:07:27,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:27,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950564904] [2021-06-12 20:07:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:27,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:27,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950564904] [2021-06-12 20:07:27,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950564904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:27,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26029172] [2021-06-12 20:07:27,947 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 20:07:27,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:27,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,025 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 16 treesize of output 12 [2021-06-12 20:07:28,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:28,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,031 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 17 treesize of output 13 [2021-06-12 20:07:28,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:28,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,074 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:28,076 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 20:07:28,076 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:28,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26029172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:28,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:28,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799077875] [2021-06-12 20:07:28,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:28,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:28,233 INFO L87 Difference]: Start difference. First operand 1348 states and 4460 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:28,501 INFO L93 Difference]: Finished difference Result 1999 states and 6424 transitions. [2021-06-12 20:07:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:28,504 INFO L225 Difference]: With dead ends: 1999 [2021-06-12 20:07:28,504 INFO L226 Difference]: Without dead ends: 1975 [2021-06-12 20:07:28,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-12 20:07:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1322. [2021-06-12 20:07:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 3.311884935654807) internal successors, (4375), 1321 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 4375 transitions. [2021-06-12 20:07:28,520 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 4375 transitions. Word has length 25 [2021-06-12 20:07:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:28,521 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 4375 transitions. [2021-06-12 20:07:28,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 4375 transitions. [2021-06-12 20:07:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:28,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:28,522 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:28,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4974,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:28,722 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 424054335, now seen corresponding path program 557 times [2021-06-12 20:07:28,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:28,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926521135] [2021-06-12 20:07:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:28,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926521135] [2021-06-12 20:07:28,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926521135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057679599] [2021-06-12 20:07:28,800 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 20:07:28,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:28,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:28,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:28,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,866 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 18 treesize of output 14 [2021-06-12 20:07:28,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,870 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 17 treesize of output 13 [2021-06-12 20:07:28,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,873 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 17 treesize of output 13 [2021-06-12 20:07:28,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:28,876 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 18 treesize of output 14 [2021-06-12 20:07:28,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:28,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:28,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:28,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:07:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:29,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057679599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:29,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:29,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:29,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494091624] [2021-06-12 20:07:29,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:29,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:29,063 INFO L87 Difference]: Start difference. First operand 1322 states and 4375 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:29,413 INFO L93 Difference]: Finished difference Result 1798 states and 5766 transitions. [2021-06-12 20:07:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:29,415 INFO L225 Difference]: With dead ends: 1798 [2021-06-12 20:07:29,415 INFO L226 Difference]: Without dead ends: 1756 [2021-06-12 20:07:29,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-12 20:07:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1330. [2021-06-12 20:07:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.3009781790820165) internal successors, (4387), 1329 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4387 transitions. [2021-06-12 20:07:29,430 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4387 transitions. Word has length 25 [2021-06-12 20:07:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:29,430 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4387 transitions. [2021-06-12 20:07:29,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4387 transitions. [2021-06-12 20:07:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:29,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:29,431 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:29,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4993,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:29,632 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -321502983, now seen corresponding path program 558 times [2021-06-12 20:07:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:29,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314103717] [2021-06-12 20:07:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:29,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:29,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314103717] [2021-06-12 20:07:29,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314103717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:29,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160590563] [2021-06-12 20:07:29,713 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 20:07:29,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:29,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:29,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:29,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,796 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 16 treesize of output 12 [2021-06-12 20:07:29,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,799 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 16 treesize of output 12 [2021-06-12 20:07:29,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,802 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 20:07:29,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:29,805 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 15 treesize of output 11 [2021-06-12 20:07:29,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:29,857 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.2 percent of original size [2021-06-12 20:07:29,859 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 20:07:29,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:121, output treesize:72 [2021-06-12 20:07:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160590563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:30,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:30,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:30,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741136408] [2021-06-12 20:07:30,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:30,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:30,002 INFO L87 Difference]: Start difference. First operand 1330 states and 4387 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:30,707 INFO L93 Difference]: Finished difference Result 1824 states and 5809 transitions. [2021-06-12 20:07:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:30,709 INFO L225 Difference]: With dead ends: 1824 [2021-06-12 20:07:30,709 INFO L226 Difference]: Without dead ends: 1772 [2021-06-12 20:07:30,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-06-12 20:07:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1330. [2021-06-12 20:07:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.3009781790820165) internal successors, (4387), 1329 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4387 transitions. [2021-06-12 20:07:30,729 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4387 transitions. Word has length 25 [2021-06-12 20:07:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:30,729 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4387 transitions. [2021-06-12 20:07:30,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4387 transitions. [2021-06-12 20:07:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:30,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:30,731 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:30,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5000 [2021-06-12 20:07:30,931 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash -102026247, now seen corresponding path program 559 times [2021-06-12 20:07:30,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:30,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364628468] [2021-06-12 20:07:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:31,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364628468] [2021-06-12 20:07:31,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364628468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657499875] [2021-06-12 20:07:31,007 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 20:07:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:31,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:31,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,077 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 17 treesize of output 13 [2021-06-12 20:07:31,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,081 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 17 treesize of output 13 [2021-06-12 20:07:31,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,084 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 20:07:31,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:31,087 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 18 treesize of output 14 [2021-06-12 20:07:31,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:31,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:31,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:31,124 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:07:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:31,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657499875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:31,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:31,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:31,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544103720] [2021-06-12 20:07:31,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:31,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:31,240 INFO L87 Difference]: Start difference. First operand 1330 states and 4387 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 20:07:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:31,769 INFO L93 Difference]: Finished difference Result 1766 states and 5648 transitions. [2021-06-12 20:07:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:31,769 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 25 [2021-06-12 20:07:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:31,771 INFO L225 Difference]: With dead ends: 1766 [2021-06-12 20:07:31,771 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 20:07:31,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 20:07:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1346. [2021-06-12 20:07:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.2862453531598512) internal successors, (4420), 1345 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4420 transitions. [2021-06-12 20:07:31,785 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4420 transitions. Word has length 25 [2021-06-12 20:07:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:31,785 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 4420 transitions. [2021-06-12 20:07:31,785 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 20:07:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4420 transitions. [2021-06-12 20:07:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:31,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:31,787 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-06-12 20:07:31,987 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2142205795, now seen corresponding path program 560 times [2021-06-12 20:07:31,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:31,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414586702] [2021-06-12 20:07:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:32,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414586702] [2021-06-12 20:07:32,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414586702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379149205] [2021-06-12 20:07:32,072 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 20:07:32,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:32,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,138 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 18 treesize of output 14 [2021-06-12 20:07:32,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,142 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 18 treesize of output 14 [2021-06-12 20:07:32,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,145 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 17 treesize of output 13 [2021-06-12 20:07:32,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:32,148 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 20:07:32,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:32,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:32,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:32,185 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:07:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:32,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379149205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:32,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:32,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776226634] [2021-06-12 20:07:32,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:32,327 INFO L87 Difference]: Start difference. First operand 1346 states and 4420 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 20:07:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:32,688 INFO L93 Difference]: Finished difference Result 2280 states and 7113 transitions. [2021-06-12 20:07:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:32,688 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 25 [2021-06-12 20:07:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:32,691 INFO L225 Difference]: With dead ends: 2280 [2021-06-12 20:07:32,691 INFO L226 Difference]: Without dead ends: 2202 [2021-06-12 20:07:32,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-12 20:07:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1352. [2021-06-12 20:07:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.2820133234641005) internal successors, (4434), 1351 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4434 transitions. [2021-06-12 20:07:32,708 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4434 transitions. Word has length 25 [2021-06-12 20:07:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:32,708 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4434 transitions. [2021-06-12 20:07:32,708 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 20:07:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4434 transitions. [2021-06-12 20:07:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:32,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:32,709 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:32,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5021,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:32,910 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1896490861, now seen corresponding path program 561 times [2021-06-12 20:07:32,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:32,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703213856] [2021-06-12 20:07:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:32,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:32,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703213856] [2021-06-12 20:07:32,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703213856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:32,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254765378] [2021-06-12 20:07:32,969 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 20:07:32,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:07:32,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:32,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:32,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:33,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,049 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 17 treesize of output 13 [2021-06-12 20:07:33,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,053 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 16 treesize of output 12 [2021-06-12 20:07:33,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,057 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 16 treesize of output 12 [2021-06-12 20:07:33,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,060 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 15 treesize of output 11 [2021-06-12 20:07:33,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,113 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:33,115 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 20:07:33,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254765378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:33,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:33,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:07:33,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753705569] [2021-06-12 20:07:33,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:07:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:07:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:07:33,229 INFO L87 Difference]: Start difference. First operand 1352 states and 4434 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 20:07:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:33,405 INFO L93 Difference]: Finished difference Result 2413 states and 7745 transitions. [2021-06-12 20:07:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:07:33,405 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 25 [2021-06-12 20:07:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:33,408 INFO L225 Difference]: With dead ends: 2413 [2021-06-12 20:07:33,408 INFO L226 Difference]: Without dead ends: 2413 [2021-06-12 20:07:33,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-12 20:07:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1355. [2021-06-12 20:07:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2806499261447564) internal successors, (4442), 1354 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4442 transitions. [2021-06-12 20:07:33,427 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4442 transitions. Word has length 25 [2021-06-12 20:07:33,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:33,427 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4442 transitions. [2021-06-12 20:07:33,427 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 20:07:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4442 transitions. [2021-06-12 20:07:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:33,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:33,428 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:33,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5028 [2021-06-12 20:07:33,628 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash 716340121, now seen corresponding path program 562 times [2021-06-12 20:07:33,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:33,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078780148] [2021-06-12 20:07:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:33,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:33,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078780148] [2021-06-12 20:07:33,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078780148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:33,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212482132] [2021-06-12 20:07:33,699 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 20:07:33,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:33,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:33,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,778 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 16 treesize of output 12 [2021-06-12 20:07:33,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:33,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,783 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 17 treesize of output 13 [2021-06-12 20:07:33,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:33,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:33,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:33,827 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:33,829 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 20:07:33,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:33,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212482132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:33,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:33,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:33,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724390530] [2021-06-12 20:07:33,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:33,974 INFO L87 Difference]: Start difference. First operand 1355 states and 4442 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:34,150 INFO L93 Difference]: Finished difference Result 2297 states and 7376 transitions. [2021-06-12 20:07:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:07:34,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:34,153 INFO L225 Difference]: With dead ends: 2297 [2021-06-12 20:07:34,153 INFO L226 Difference]: Without dead ends: 2297 [2021-06-12 20:07:34,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-12 20:07:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1368. [2021-06-12 20:07:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.2874908558888074) internal successors, (4494), 1367 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4494 transitions. [2021-06-12 20:07:34,170 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4494 transitions. Word has length 25 [2021-06-12 20:07:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:34,170 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4494 transitions. [2021-06-12 20:07:34,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4494 transitions. [2021-06-12 20:07:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:34,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:34,172 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:34,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:34,372 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1140412031, now seen corresponding path program 563 times [2021-06-12 20:07:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:34,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378545754] [2021-06-12 20:07:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:34,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:34,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378545754] [2021-06-12 20:07:34,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378545754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:34,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360259120] [2021-06-12 20:07:34,476 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 20:07:34,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:34,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:34,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:34,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,543 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 18 treesize of output 14 [2021-06-12 20:07:34,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,547 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 18 treesize of output 14 [2021-06-12 20:07:34,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,550 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 17 treesize of output 13 [2021-06-12 20:07:34,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:34,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:34,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:34,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:34,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:34,590 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:07:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:34,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360259120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:34,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:34,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:34,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270567117] [2021-06-12 20:07:34,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:34,788 INFO L87 Difference]: Start difference. First operand 1368 states and 4494 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:35,157 INFO L93 Difference]: Finished difference Result 2120 states and 6750 transitions. [2021-06-12 20:07:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:35,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:35,160 INFO L225 Difference]: With dead ends: 2120 [2021-06-12 20:07:35,160 INFO L226 Difference]: Without dead ends: 2068 [2021-06-12 20:07:35,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-12 20:07:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1368. [2021-06-12 20:07:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.27798098024872) internal successors, (4481), 1367 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4481 transitions. [2021-06-12 20:07:35,182 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4481 transitions. Word has length 25 [2021-06-12 20:07:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:35,182 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4481 transitions. [2021-06-12 20:07:35,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4481 transitions. [2021-06-12 20:07:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:35,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:35,183 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:35,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5050 [2021-06-12 20:07:35,384 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1697874237, now seen corresponding path program 564 times [2021-06-12 20:07:35,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:35,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186591192] [2021-06-12 20:07:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:35,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186591192] [2021-06-12 20:07:35,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186591192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203451606] [2021-06-12 20:07:35,449 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 20:07:35,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:35,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:35,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:35,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,528 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 16 treesize of output 12 [2021-06-12 20:07:35,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,531 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 17 treesize of output 13 [2021-06-12 20:07:35,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,534 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 16 treesize of output 12 [2021-06-12 20:07:35,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:35,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:35,578 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-12 20:07:35,580 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 20:07:35,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-12 20:07:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:35,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203451606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:35,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:35,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:35,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031956304] [2021-06-12 20:07:35,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:35,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:35,750 INFO L87 Difference]: Start difference. First operand 1368 states and 4481 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 20:07:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:36,027 INFO L93 Difference]: Finished difference Result 2337 states and 7461 transitions. [2021-06-12 20:07:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:36,027 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 25 [2021-06-12 20:07:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:36,030 INFO L225 Difference]: With dead ends: 2337 [2021-06-12 20:07:36,030 INFO L226 Difference]: Without dead ends: 2337 [2021-06-12 20:07:36,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:07:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-12 20:07:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1374. [2021-06-12 20:07:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.2855061908230154) internal successors, (4511), 1373 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4511 transitions. [2021-06-12 20:07:36,049 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4511 transitions. Word has length 25 [2021-06-12 20:07:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:36,049 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4511 transitions. [2021-06-12 20:07:36,049 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 20:07:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4511 transitions. [2021-06-12 20:07:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:36,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:36,051 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:36,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 565 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5057 [2021-06-12 20:07:36,251 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:36,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1502394141, now seen corresponding path program 565 times [2021-06-12 20:07:36,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:36,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432366095] [2021-06-12 20:07:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:36,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:36,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432366095] [2021-06-12 20:07:36,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432366095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:36,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106634027] [2021-06-12 20:07:36,336 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 20:07:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,402 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 20:07:36,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,405 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 18 treesize of output 14 [2021-06-12 20:07:36,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,408 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 17 treesize of output 13 [2021-06-12 20:07:36,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,411 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 18 treesize of output 14 [2021-06-12 20:07:36,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:36,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:07:36,626 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1998], 1=[v_prenex_1999, o_4]} [2021-06-12 20:07:36,629 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 18 treesize of output 14 [2021-06-12 20:07:36,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,632 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 20:07:36,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,682 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-12 20:07:36,684 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 20:07:36,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:36,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,700 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1999 vanished before elimination [2021-06-12 20:07:36,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:36,702 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 9 treesize of output 5 [2021-06-12 20:07:36,703 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:07:36,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:36,718 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 20:07:36,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-12 20:07:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:36,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106634027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:36,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:36,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:36,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159878503] [2021-06-12 20:07:36,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:36,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:36,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:36,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:36,748 INFO L87 Difference]: Start difference. First operand 1374 states and 4511 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 20:07:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:37,361 INFO L93 Difference]: Finished difference Result 2066 states and 6666 transitions. [2021-06-12 20:07:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:07:37,362 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 25 [2021-06-12 20:07:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:37,364 INFO L225 Difference]: With dead ends: 2066 [2021-06-12 20:07:37,364 INFO L226 Difference]: Without dead ends: 2040 [2021-06-12 20:07:37,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:07:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-12 20:07:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1402. [2021-06-12 20:07:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.28051391862955) internal successors, (4596), 1401 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4596 transitions. [2021-06-12 20:07:37,381 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4596 transitions. Word has length 25 [2021-06-12 20:07:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:37,381 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4596 transitions. [2021-06-12 20:07:37,381 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 20:07:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4596 transitions. [2021-06-12 20:07:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:37,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:37,382 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:37,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5075 [2021-06-12 20:07:37,583 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1236976319, now seen corresponding path program 566 times [2021-06-12 20:07:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:37,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909708739] [2021-06-12 20:07:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:37,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:37,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909708739] [2021-06-12 20:07:37,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909708739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:37,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347147654] [2021-06-12 20:07:37,681 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 20:07:37,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:37,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:37,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,747 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 18 treesize of output 14 [2021-06-12 20:07:37,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,751 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 18 treesize of output 14 [2021-06-12 20:07:37,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,754 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 17 treesize of output 13 [2021-06-12 20:07:37,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:37,757 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 20:07:37,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:37,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:37,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-12 20:07:37,981 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_2003], 1=[o_4, v_prenex_2004]} [2021-06-12 20:07:37,983 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 17 treesize of output 13 [2021-06-12 20:07:37,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:37,986 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 18 treesize of output 14 [2021-06-12 20:07:37,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,031 INFO L628 ElimStorePlain]: treesize reduction 80, result has 37.0 percent of original size [2021-06-12 20:07:38,033 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 9 treesize of output 7 [2021-06-12 20:07:38,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:38,048 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:38,048 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2004 vanished before elimination [2021-06-12 20:07:38,049 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 20:07:38,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-12 20:07:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:38,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347147654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:38,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:38,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:07:38,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050763828] [2021-06-12 20:07:38,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:38,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:38,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:38,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:38,089 INFO L87 Difference]: Start difference. First operand 1402 states and 4596 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 20:07:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:38,421 INFO L93 Difference]: Finished difference Result 2128 states and 6803 transitions. [2021-06-12 20:07:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:38,421 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 25 [2021-06-12 20:07:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:38,424 INFO L225 Difference]: With dead ends: 2128 [2021-06-12 20:07:38,424 INFO L226 Difference]: Without dead ends: 2128 [2021-06-12 20:07:38,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-06-12 20:07:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1360. [2021-06-12 20:07:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.2840323767476085) internal successors, (4463), 1359 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4463 transitions. [2021-06-12 20:07:38,440 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4463 transitions. Word has length 25 [2021-06-12 20:07:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:38,441 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4463 transitions. [2021-06-12 20:07:38,441 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 20:07:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4463 transitions. [2021-06-12 20:07:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:38,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:38,442 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:38,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5084,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:38,642 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:38,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1991035803, now seen corresponding path program 567 times [2021-06-12 20:07:38,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:38,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125855507] [2021-06-12 20:07:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:38,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:38,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125855507] [2021-06-12 20:07:38,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125855507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:38,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958413483] [2021-06-12 20:07:38,726 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 20:07:38,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:38,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,824 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 17 treesize of output 13 [2021-06-12 20:07:38,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,828 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 16 treesize of output 12 [2021-06-12 20:07:38,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,832 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 15 treesize of output 11 [2021-06-12 20:07:38,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:38,836 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 16 treesize of output 12 [2021-06-12 20:07:38,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:38,920 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:38,925 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 20:07:38,925 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:39,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958413483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:39,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:39,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:39,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310244214] [2021-06-12 20:07:39,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:39,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:39,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:39,170 INFO L87 Difference]: Start difference. First operand 1360 states and 4463 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:39,496 INFO L93 Difference]: Finished difference Result 1984 states and 6401 transitions. [2021-06-12 20:07:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:39,499 INFO L225 Difference]: With dead ends: 1984 [2021-06-12 20:07:39,499 INFO L226 Difference]: Without dead ends: 1984 [2021-06-12 20:07:39,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:07:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-12 20:07:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1383. [2021-06-12 20:07:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 3.2858176555716354) internal successors, (4541), 1382 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 4541 transitions. [2021-06-12 20:07:39,516 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 4541 transitions. Word has length 25 [2021-06-12 20:07:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:39,516 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 4541 transitions. [2021-06-12 20:07:39,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 4541 transitions. [2021-06-12 20:07:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:39,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:39,517 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:39,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5092,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:39,718 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash 565959677, now seen corresponding path program 568 times [2021-06-12 20:07:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:39,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097305599] [2021-06-12 20:07:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:39,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:39,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097305599] [2021-06-12 20:07:39,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097305599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:39,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460408499] [2021-06-12 20:07:39,792 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 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 20:07:39,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:39,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,890 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 20:07:39,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,893 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 16 treesize of output 12 [2021-06-12 20:07:39,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,897 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 15 treesize of output 11 [2021-06-12 20:07:39,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:39,900 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 16 treesize of output 12 [2021-06-12 20:07:39,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:39,972 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:39,977 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 20:07:39,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:40,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460408499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:40,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:40,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774405396] [2021-06-12 20:07:40,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:40,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:40,226 INFO L87 Difference]: Start difference. First operand 1383 states and 4541 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:40,850 INFO L93 Difference]: Finished difference Result 2191 states and 6920 transitions. [2021-06-12 20:07:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:07:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:40,853 INFO L225 Difference]: With dead ends: 2191 [2021-06-12 20:07:40,853 INFO L226 Difference]: Without dead ends: 2191 [2021-06-12 20:07:40,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:07:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-12 20:07:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1388. [2021-06-12 20:07:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.2927180966113916) internal successors, (4567), 1387 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4567 transitions. [2021-06-12 20:07:40,872 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4567 transitions. Word has length 25 [2021-06-12 20:07:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:40,872 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4567 transitions. [2021-06-12 20:07:40,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4567 transitions. [2021-06-12 20:07:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:40,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:40,873 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:41,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5103,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:41,073 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash -920514745, now seen corresponding path program 569 times [2021-06-12 20:07:41,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:41,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488590963] [2021-06-12 20:07:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:41,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:41,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488590963] [2021-06-12 20:07:41,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488590963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:41,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862096633] [2021-06-12 20:07:41,156 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 20:07:41,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,245 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 20:07:41,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,249 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 16 treesize of output 12 [2021-06-12 20:07:41,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,253 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 15 treesize of output 11 [2021-06-12 20:07:41,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:41,255 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 16 treesize of output 12 [2021-06-12 20:07:41,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:41,327 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:41,332 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 20:07:41,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862096633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:41,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:41,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743338471] [2021-06-12 20:07:41,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:41,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:41,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:41,570 INFO L87 Difference]: Start difference. First operand 1388 states and 4567 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:41,958 INFO L93 Difference]: Finished difference Result 1993 states and 6392 transitions. [2021-06-12 20:07:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:41,961 INFO L225 Difference]: With dead ends: 1993 [2021-06-12 20:07:41,961 INFO L226 Difference]: Without dead ends: 1969 [2021-06-12 20:07:41,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-06-12 20:07:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1368. [2021-06-12 20:07:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.2867593269934163) internal successors, (4493), 1367 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4493 transitions. [2021-06-12 20:07:41,976 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4493 transitions. Word has length 25 [2021-06-12 20:07:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:41,976 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4493 transitions. [2021-06-12 20:07:41,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4493 transitions. [2021-06-12 20:07:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:41,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:41,977 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:42,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5120 [2021-06-12 20:07:42,178 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash 733882199, now seen corresponding path program 570 times [2021-06-12 20:07:42,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:42,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963942277] [2021-06-12 20:07:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:42,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:42,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963942277] [2021-06-12 20:07:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963942277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:42,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029553116] [2021-06-12 20:07:42,282 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 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 20:07:42,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:42,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,402 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 15 treesize of output 11 [2021-06-12 20:07:42,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:42,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,409 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 16 treesize of output 12 [2021-06-12 20:07:42,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:42,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:42,497 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:07:42,505 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 20:07:42,505 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:98 [2021-06-12 20:07:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:42,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029553116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:42,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:42,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:42,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200337905] [2021-06-12 20:07:42,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:42,815 INFO L87 Difference]: Start difference. First operand 1368 states and 4493 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:43,737 INFO L93 Difference]: Finished difference Result 1815 states and 5804 transitions. [2021-06-12 20:07:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:43,740 INFO L225 Difference]: With dead ends: 1815 [2021-06-12 20:07:43,740 INFO L226 Difference]: Without dead ends: 1763 [2021-06-12 20:07:43,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 912.7ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-06-12 20:07:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1368. [2021-06-12 20:07:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.2867593269934163) internal successors, (4493), 1367 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4493 transitions. [2021-06-12 20:07:43,754 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4493 transitions. Word has length 25 [2021-06-12 20:07:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:43,754 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4493 transitions. [2021-06-12 20:07:43,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4493 transitions. [2021-06-12 20:07:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:43,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:43,756 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:43,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5134 [2021-06-12 20:07:43,956 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1603636545, now seen corresponding path program 571 times [2021-06-12 20:07:43,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:43,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28551428] [2021-06-12 20:07:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:44,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:44,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28551428] [2021-06-12 20:07:44,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28551428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:44,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126280500] [2021-06-12 20:07:44,040 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 20:07:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:44,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,127 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 17 treesize of output 13 [2021-06-12 20:07:44,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,131 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 18 treesize of output 14 [2021-06-12 20:07:44,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,135 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 17 treesize of output 13 [2021-06-12 20:07:44,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:44,138 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 18 treesize of output 14 [2021-06-12 20:07:44,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:44,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:44,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:44,199 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126280500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:44,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:44,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507417986] [2021-06-12 20:07:44,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:44,488 INFO L87 Difference]: Start difference. First operand 1368 states and 4493 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 20:07:44,984 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2021-06-12 20:07:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:45,232 INFO L93 Difference]: Finished difference Result 1873 states and 5930 transitions. [2021-06-12 20:07:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:07:45,232 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 25 [2021-06-12 20:07:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:45,234 INFO L225 Difference]: With dead ends: 1873 [2021-06-12 20:07:45,234 INFO L226 Difference]: Without dead ends: 1847 [2021-06-12 20:07:45,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-06-12 20:07:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1412. [2021-06-12 20:07:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.2593905031892274) internal successors, (4599), 1411 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4599 transitions. [2021-06-12 20:07:45,249 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4599 transitions. Word has length 25 [2021-06-12 20:07:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:45,249 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4599 transitions. [2021-06-12 20:07:45,249 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 20:07:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4599 transitions. [2021-06-12 20:07:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:45,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:45,251 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:45,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5152 [2021-06-12 20:07:45,451 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash 953358935, now seen corresponding path program 572 times [2021-06-12 20:07:45,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:45,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140292101] [2021-06-12 20:07:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:45,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140292101] [2021-06-12 20:07:45,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140292101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113712101] [2021-06-12 20:07:45,540 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 20:07:45,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:45,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,630 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 18 treesize of output 14 [2021-06-12 20:07:45,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:45,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:45,638 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 20:07:45,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:45,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:45,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:45,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:07:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:45,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113712101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:45,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:45,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:45,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777474446] [2021-06-12 20:07:45,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:45,934 INFO L87 Difference]: Start difference. First operand 1412 states and 4599 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 20:07:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:46,494 INFO L93 Difference]: Finished difference Result 1832 states and 5816 transitions. [2021-06-12 20:07:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:46,495 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 25 [2021-06-12 20:07:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:46,497 INFO L225 Difference]: With dead ends: 1832 [2021-06-12 20:07:46,497 INFO L226 Difference]: Without dead ends: 1792 [2021-06-12 20:07:46,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-12 20:07:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1372. [2021-06-12 20:07:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.2815463165572574) internal successors, (4499), 1371 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4499 transitions. [2021-06-12 20:07:46,512 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4499 transitions. Word has length 25 [2021-06-12 20:07:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:46,512 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4499 transitions. [2021-06-12 20:07:46,512 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 20:07:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4499 transitions. [2021-06-12 20:07:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:46,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:46,513 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:46,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5161,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:46,714 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash 496455909, now seen corresponding path program 573 times [2021-06-12 20:07:46,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:46,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877946351] [2021-06-12 20:07:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:46,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:46,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877946351] [2021-06-12 20:07:46,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877946351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:46,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990740738] [2021-06-12 20:07:46,789 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 20:07:46,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:07:46,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:46,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,886 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 16 treesize of output 12 [2021-06-12 20:07:46,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,890 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 20:07:46,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,893 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 15 treesize of output 11 [2021-06-12 20:07:46,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:46,896 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 16 treesize of output 12 [2021-06-12 20:07:46,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:46,967 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:46,972 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 20:07:46,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:47,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990740738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:47,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:47,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:47,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503583256] [2021-06-12 20:07:47,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:47,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:47,212 INFO L87 Difference]: Start difference. First operand 1372 states and 4499 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:47,560 INFO L93 Difference]: Finished difference Result 1972 states and 6360 transitions. [2021-06-12 20:07:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:07:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:47,563 INFO L225 Difference]: With dead ends: 1972 [2021-06-12 20:07:47,563 INFO L226 Difference]: Without dead ends: 1972 [2021-06-12 20:07:47,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:07:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-06-12 20:07:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1379. [2021-06-12 20:07:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.2822931785195935) internal successors, (4523), 1378 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4523 transitions. [2021-06-12 20:07:47,579 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4523 transitions. Word has length 25 [2021-06-12 20:07:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:47,579 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4523 transitions. [2021-06-12 20:07:47,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4523 transitions. [2021-06-12 20:07:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:47,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:47,580 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:47,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5170 [2021-06-12 20:07:47,780 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -918918403, now seen corresponding path program 574 times [2021-06-12 20:07:47,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:47,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476091829] [2021-06-12 20:07:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:47,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:47,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476091829] [2021-06-12 20:07:47,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476091829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:47,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120945745] [2021-06-12 20:07:47,856 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 20:07:47,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:47,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,945 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 16 treesize of output 12 [2021-06-12 20:07:47,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,949 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 17 treesize of output 13 [2021-06-12 20:07:47,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:07:47,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:47,955 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 15 treesize of output 11 [2021-06-12 20:07:47,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:48,026 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:48,031 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 20:07:48,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:48,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120945745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:48,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:48,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:07:48,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044658491] [2021-06-12 20:07:48,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:48,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:48,326 INFO L87 Difference]: Start difference. First operand 1379 states and 4523 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:48,916 INFO L93 Difference]: Finished difference Result 2052 states and 6578 transitions. [2021-06-12 20:07:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:07:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:07:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:48,919 INFO L225 Difference]: With dead ends: 2052 [2021-06-12 20:07:48,919 INFO L226 Difference]: Without dead ends: 2052 [2021-06-12 20:07:48,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:07:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-06-12 20:07:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1388. [2021-06-12 20:07:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.2905551550108147) internal successors, (4564), 1387 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4564 transitions. [2021-06-12 20:07:48,936 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4564 transitions. Word has length 25 [2021-06-12 20:07:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:48,936 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4564 transitions. [2021-06-12 20:07:48,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4564 transitions. [2021-06-12 20:07:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:48,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:48,937 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:49,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5177,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:49,137 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2013617321, now seen corresponding path program 575 times [2021-06-12 20:07:49,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:49,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268688859] [2021-06-12 20:07:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:49,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:49,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268688859] [2021-06-12 20:07:49,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268688859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:49,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888782] [2021-06-12 20:07:49,242 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 20:07:49,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:49,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:49,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,330 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 18 treesize of output 14 [2021-06-12 20:07:49,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,334 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 18 treesize of output 14 [2021-06-12 20:07:49,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,337 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 20:07:49,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:49,388 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:07:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,690 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 17 treesize of output 13 [2021-06-12 20:07:49,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:49,693 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 18 treesize of output 14 [2021-06-12 20:07:49,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,755 INFO L628 ElimStorePlain]: treesize reduction 86, result has 38.1 percent of original size [2021-06-12 20:07:49,755 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:49,757 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 20:07:49,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:49,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:49,775 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2054 vanished before elimination [2021-06-12 20:07:49,776 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 20:07:49,776 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:153, output treesize:22 [2021-06-12 20:07:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:49,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:49,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:49,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658426489] [2021-06-12 20:07:49,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:49,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:49,807 INFO L87 Difference]: Start difference. First operand 1388 states and 4564 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 20:07:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:50,403 INFO L93 Difference]: Finished difference Result 1902 states and 6110 transitions. [2021-06-12 20:07:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:50,404 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 25 [2021-06-12 20:07:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:50,406 INFO L225 Difference]: With dead ends: 1902 [2021-06-12 20:07:50,406 INFO L226 Difference]: Without dead ends: 1876 [2021-06-12 20:07:50,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:50,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-06-12 20:07:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1409. [2021-06-12 20:07:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.286221590909091) internal successors, (4627), 1408 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4627 transitions. [2021-06-12 20:07:50,422 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4627 transitions. Word has length 25 [2021-06-12 20:07:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:50,422 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4627 transitions. [2021-06-12 20:07:50,422 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 20:07:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4627 transitions. [2021-06-12 20:07:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:50,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:50,424 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5192 [2021-06-12 20:07:50,624 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2015932153, now seen corresponding path program 576 times [2021-06-12 20:07:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:50,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715203457] [2021-06-12 20:07:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:50,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715203457] [2021-06-12 20:07:50,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715203457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183281791] [2021-06-12 20:07:50,751 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 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 20:07:50,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:07:50,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:50,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:50,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:50,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,842 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 18 treesize of output 14 [2021-06-12 20:07:50,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,845 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 18 treesize of output 14 [2021-06-12 20:07:50,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:50,848 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 20:07:50,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:50,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:50,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:50,909 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-12 20:07:51,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:51,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:51,233 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 17 treesize of output 13 [2021-06-12 20:07:51,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:51,236 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 18 treesize of output 14 [2021-06-12 20:07:51,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,297 INFO L628 ElimStorePlain]: treesize reduction 98, result has 39.1 percent of original size [2021-06-12 20:07:51,300 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 20:07:51,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:51,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:51,320 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2061 vanished before elimination [2021-06-12 20:07:51,320 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:51,321 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 20:07:51,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:173, output treesize:22 [2021-06-12 20:07:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:51,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183281791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:51,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:51,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:07:51,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831380780] [2021-06-12 20:07:51,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:07:51,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:51,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:07:51,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:07:51,365 INFO L87 Difference]: Start difference. First operand 1409 states and 4627 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 20:07:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:51,854 INFO L93 Difference]: Finished difference Result 1925 states and 6153 transitions. [2021-06-12 20:07:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:51,854 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 25 [2021-06-12 20:07:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:51,857 INFO L225 Difference]: With dead ends: 1925 [2021-06-12 20:07:51,857 INFO L226 Difference]: Without dead ends: 1925 [2021-06-12 20:07:51,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-12 20:07:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1376. [2021-06-12 20:07:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.2836363636363637) internal successors, (4515), 1375 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4515 transitions. [2021-06-12 20:07:51,872 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4515 transitions. Word has length 25 [2021-06-12 20:07:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:51,872 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4515 transitions. [2021-06-12 20:07:51,872 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 20:07:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4515 transitions. [2021-06-12 20:07:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:51,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:51,874 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:52,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5202,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:52,074 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2016276725, now seen corresponding path program 577 times [2021-06-12 20:07:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:52,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673632721] [2021-06-12 20:07:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:52,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:52,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673632721] [2021-06-12 20:07:52,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673632721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:52,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594166517] [2021-06-12 20:07:52,149 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 20:07:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:52,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:52,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,260 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 16 treesize of output 12 [2021-06-12 20:07:52,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,263 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 15 treesize of output 11 [2021-06-12 20:07:52,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,267 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 17 treesize of output 13 [2021-06-12 20:07:52,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:52,270 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 16 treesize of output 12 [2021-06-12 20:07:52,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:52,343 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:52,348 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 20:07:52,348 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:52,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594166517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:52,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:52,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:52,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318433881] [2021-06-12 20:07:52,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:52,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:52,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:52,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:52,631 INFO L87 Difference]: Start difference. First operand 1376 states and 4515 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 20:07:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:52,924 INFO L93 Difference]: Finished difference Result 1943 states and 6242 transitions. [2021-06-12 20:07:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:52,925 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 25 [2021-06-12 20:07:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:52,927 INFO L225 Difference]: With dead ends: 1943 [2021-06-12 20:07:52,927 INFO L226 Difference]: Without dead ends: 1915 [2021-06-12 20:07:52,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-06-12 20:07:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1374. [2021-06-12 20:07:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.283321194464676) internal successors, (4508), 1373 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4508 transitions. [2021-06-12 20:07:52,942 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4508 transitions. Word has length 25 [2021-06-12 20:07:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:52,942 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4508 transitions. [2021-06-12 20:07:52,942 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 20:07:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4508 transitions. [2021-06-12 20:07:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:52,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:52,943 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:53,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5211 [2021-06-12 20:07:53,144 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash -287713901, now seen corresponding path program 578 times [2021-06-12 20:07:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:53,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926620335] [2021-06-12 20:07:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:53,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926620335] [2021-06-12 20:07:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926620335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958752263] [2021-06-12 20:07:53,222 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 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 20:07:53,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:07:53,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:53,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:53,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,319 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 16 treesize of output 12 [2021-06-12 20:07:53,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,322 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 20:07:53,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,326 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 16 treesize of output 12 [2021-06-12 20:07:53,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:53,329 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 15 treesize of output 11 [2021-06-12 20:07:53,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:53,401 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:07:53,406 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 20:07:53,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:07:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958752263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:53,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:53,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695260358] [2021-06-12 20:07:53,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:53,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:53,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:53,653 INFO L87 Difference]: Start difference. First operand 1374 states and 4508 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:54,186 INFO L93 Difference]: Finished difference Result 2235 states and 7029 transitions. [2021-06-12 20:07:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:07:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:54,189 INFO L225 Difference]: With dead ends: 2235 [2021-06-12 20:07:54,189 INFO L226 Difference]: Without dead ends: 2235 [2021-06-12 20:07:54,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:07:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-12 20:07:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1384. [2021-06-12 20:07:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.297180043383948) internal successors, (4560), 1383 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 4560 transitions. [2021-06-12 20:07:54,207 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 4560 transitions. Word has length 25 [2021-06-12 20:07:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:54,207 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 4560 transitions. [2021-06-12 20:07:54,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 4560 transitions. [2021-06-12 20:07:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:54,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:54,209 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:54,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5231 [2021-06-12 20:07:54,409 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1774188323, now seen corresponding path program 579 times [2021-06-12 20:07:54,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:54,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179639001] [2021-06-12 20:07:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:54,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179639001] [2021-06-12 20:07:54,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179639001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351373493] [2021-06-12 20:07:54,478 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 20:07:54,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:07:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:54,534 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 20:07:54,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:07:54,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:07:54,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,540 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 15 treesize of output 11 [2021-06-12 20:07:54,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:54,564 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-06-12 20:07:54,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:54,564 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-06-12 20:07:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:54,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351373493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:54,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:54,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:54,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077640779] [2021-06-12 20:07:54,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:54,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:54,656 INFO L87 Difference]: Start difference. First operand 1384 states and 4560 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:54,972 INFO L93 Difference]: Finished difference Result 2091 states and 6630 transitions. [2021-06-12 20:07:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:54,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:07:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:54,974 INFO L225 Difference]: With dead ends: 2091 [2021-06-12 20:07:54,974 INFO L226 Difference]: Without dead ends: 2067 [2021-06-12 20:07:54,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:07:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-12 20:07:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1379. [2021-06-12 20:07:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.2902757619738754) internal successors, (4534), 1378 states have internal predecessors, (4534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4534 transitions. [2021-06-12 20:07:54,991 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4534 transitions. Word has length 25 [2021-06-12 20:07:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:54,991 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4534 transitions. [2021-06-12 20:07:54,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:07:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4534 transitions. [2021-06-12 20:07:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:54,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:54,992 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:55,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5254 [2021-06-12 20:07:55,193 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1185660001, now seen corresponding path program 580 times [2021-06-12 20:07:55,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:55,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585730684] [2021-06-12 20:07:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:55,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:55,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585730684] [2021-06-12 20:07:55,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585730684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:55,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300636430] [2021-06-12 20:07:55,270 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 20:07:55,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:07:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:55,325 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 17 treesize of output 13 [2021-06-12 20:07:55,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,327 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 17 treesize of output 13 [2021-06-12 20:07:55,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,329 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 18 treesize of output 14 [2021-06-12 20:07:55,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,332 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 18 treesize of output 14 [2021-06-12 20:07:55,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:55,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:55,365 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 20:07:55,448 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 18 treesize of output 14 [2021-06-12 20:07:55,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,450 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 20:07:55,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,453 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 20:07:55,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,456 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 18 treesize of output 14 [2021-06-12 20:07:55,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,458 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 17 treesize of output 13 [2021-06-12 20:07:55,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,461 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 18 treesize of output 14 [2021-06-12 20:07:55,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,463 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 18 treesize of output 14 [2021-06-12 20:07:55,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,465 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 20:07:55,466 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:55,512 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-12 20:07:55,512 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:55,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:55,513 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-12 20:07:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:55,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300636430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:55,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:55,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:55,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105826147] [2021-06-12 20:07:55,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:55,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:55,557 INFO L87 Difference]: Start difference. First operand 1379 states and 4534 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 20:07:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:56,057 INFO L93 Difference]: Finished difference Result 2012 states and 6292 transitions. [2021-06-12 20:07:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:07:56,057 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 25 [2021-06-12 20:07:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:56,059 INFO L225 Difference]: With dead ends: 2012 [2021-06-12 20:07:56,059 INFO L226 Difference]: Without dead ends: 1986 [2021-06-12 20:07:56,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-06-12 20:07:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1418. [2021-06-12 20:07:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.280875088214538) internal successors, (4649), 1417 states have internal predecessors, (4649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4649 transitions. [2021-06-12 20:07:56,082 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4649 transitions. Word has length 25 [2021-06-12 20:07:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:56,082 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4649 transitions. [2021-06-12 20:07:56,082 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 20:07:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4649 transitions. [2021-06-12 20:07:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:56,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:56,083 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:56,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:56,284 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash -552311815, now seen corresponding path program 581 times [2021-06-12 20:07:56,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:56,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955268881] [2021-06-12 20:07:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:56,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955268881] [2021-06-12 20:07:56,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955268881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741178566] [2021-06-12 20:07:56,374 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 20:07:56,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:07:56,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:56,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,462 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 18 treesize of output 14 [2021-06-12 20:07:56,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,466 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 20:07:56,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:07:56,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,473 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 17 treesize of output 13 [2021-06-12 20:07:56,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:07:56,525 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:07:56,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,727 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 19 treesize of output 15 [2021-06-12 20:07:56,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:07:56,731 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 18 treesize of output 14 [2021-06-12 20:07:56,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,863 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-12 20:07:56,863 INFO L628 ElimStorePlain]: treesize reduction 181, result has 38.9 percent of original size [2021-06-12 20:07:56,866 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 7 treesize of output 5 [2021-06-12 20:07:56,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,910 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 8 treesize of output 6 [2021-06-12 20:07:56,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,950 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:56,950 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2078 vanished before elimination [2021-06-12 20:07:56,953 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 20:07:56,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:56,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:56,990 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2080 vanished before elimination [2021-06-12 20:07:56,990 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2081 vanished before elimination [2021-06-12 20:07:56,991 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 20:07:56,991 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 16 variables, input treesize:321, output treesize:47 [2021-06-12 20:07:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:07:57,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741178566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:57,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:57,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:07:57,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966077119] [2021-06-12 20:07:57,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:07:57,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:07:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:07:57,057 INFO L87 Difference]: Start difference. First operand 1418 states and 4649 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 20:07:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:58,159 INFO L93 Difference]: Finished difference Result 2025 states and 6322 transitions. [2021-06-12 20:07:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:07:58,159 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 25 [2021-06-12 20:07:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:58,162 INFO L225 Difference]: With dead ends: 2025 [2021-06-12 20:07:58,162 INFO L226 Difference]: Without dead ends: 1993 [2021-06-12 20:07:58,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1056.6ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:07:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-06-12 20:07:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1402. [2021-06-12 20:07:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.2869379014989293) internal successors, (4605), 1401 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4605 transitions. [2021-06-12 20:07:58,179 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4605 transitions. Word has length 25 [2021-06-12 20:07:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:58,179 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4605 transitions. [2021-06-12 20:07:58,179 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 20:07:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4605 transitions. [2021-06-12 20:07:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:58,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:58,181 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:58,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5265 [2021-06-12 20:07:58,381 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash -346019565, now seen corresponding path program 582 times [2021-06-12 20:07:58,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:58,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896878976] [2021-06-12 20:07:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:58,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:58,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896878976] [2021-06-12 20:07:58,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896878976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:58,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923132174] [2021-06-12 20:07:58,448 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 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 20:07:58,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:07:58,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:07:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:07:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:58,505 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 20:07:58,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,507 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 16 treesize of output 12 [2021-06-12 20:07:58,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:07:58,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,511 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 15 treesize of output 11 [2021-06-12 20:07:58,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:58,535 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-06-12 20:07:58,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:58,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-06-12 20:07:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923132174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:58,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:58,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:58,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567647654] [2021-06-12 20:07:58,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:58,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:58,631 INFO L87 Difference]: Start difference. First operand 1402 states and 4605 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 20:07:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:07:58,955 INFO L93 Difference]: Finished difference Result 2204 states and 6966 transitions. [2021-06-12 20:07:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:07:58,956 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 25 [2021-06-12 20:07:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:07:58,958 INFO L225 Difference]: With dead ends: 2204 [2021-06-12 20:07:58,958 INFO L226 Difference]: Without dead ends: 2204 [2021-06-12 20:07:58,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:07:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-12 20:07:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1406. [2021-06-12 20:07:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 3.2918149466192173) internal successors, (4625), 1405 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:07:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 4625 transitions. [2021-06-12 20:07:58,978 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 4625 transitions. Word has length 25 [2021-06-12 20:07:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:07:58,978 INFO L482 AbstractCegarLoop]: Abstraction has 1406 states and 4625 transitions. [2021-06-12 20:07:58,978 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 20:07:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 4625 transitions. [2021-06-12 20:07:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:07:58,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:07:58,979 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:07:59,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5279,583 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:07:59,180 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:07:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:07:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash -333015839, now seen corresponding path program 583 times [2021-06-12 20:07:59,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:07:59,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434059903] [2021-06-12 20:07:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:07:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:59,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:07:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434059903] [2021-06-12 20:07:59,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434059903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540852748] [2021-06-12 20:07:59,255 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 20:07:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:07:59,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:07:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:07:59,308 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 20:07:59,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,311 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 17 treesize of output 13 [2021-06-12 20:07:59,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,313 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 18 treesize of output 14 [2021-06-12 20:07:59,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:07:59,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:07:59,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:59,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 20:07:59,420 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 18 treesize of output 14 [2021-06-12 20:07:59,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,423 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 19 treesize of output 15 [2021-06-12 20:07:59,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,426 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 20:07:59,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,435 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 18 treesize of output 14 [2021-06-12 20:07:59,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,438 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 17 treesize of output 13 [2021-06-12 20:07:59,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,441 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 18 treesize of output 14 [2021-06-12 20:07:59,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:07:59,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,447 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 20:07:59,448 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:07:59,507 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-12 20:07:59,507 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:07:59,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:07:59,508 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-12 20:07:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:07:59,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540852748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:07:59,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:07:59,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:07:59,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538920529] [2021-06-12 20:07:59,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:07:59,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:07:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:07:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:07:59,588 INFO L87 Difference]: Start difference. First operand 1406 states and 4625 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 20:08:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:00,045 INFO L93 Difference]: Finished difference Result 2097 states and 6574 transitions. [2021-06-12 20:08:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:08:00,046 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 25 [2021-06-12 20:08:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:00,048 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 20:08:00,048 INFO L226 Difference]: Without dead ends: 2081 [2021-06-12 20:08:00,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-06-12 20:08:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1410. [2021-06-12 20:08:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2938254080908447) internal successors, (4641), 1409 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4641 transitions. [2021-06-12 20:08:00,066 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4641 transitions. Word has length 25 [2021-06-12 20:08:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:00,067 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4641 transitions. [2021-06-12 20:08:00,067 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 20:08:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4641 transitions. [2021-06-12 20:08:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:00,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:00,068 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:00,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5284 [2021-06-12 20:08:00,268 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1928314977, now seen corresponding path program 584 times [2021-06-12 20:08:00,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:00,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126005189] [2021-06-12 20:08:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:00,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126005189] [2021-06-12 20:08:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126005189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848537508] [2021-06-12 20:08:00,352 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 20:08:00,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:00,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:00,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,409 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 17 treesize of output 13 [2021-06-12 20:08:00,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,412 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 18 treesize of output 14 [2021-06-12 20:08:00,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,414 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 18 treesize of output 14 [2021-06-12 20:08:00,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:00,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:00,439 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-12 20:08:00,520 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 18 treesize of output 14 [2021-06-12 20:08:00,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,523 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 19 treesize of output 15 [2021-06-12 20:08:00,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,533 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 17 treesize of output 13 [2021-06-12 20:08:00,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:00,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:00,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,541 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 18 treesize of output 14 [2021-06-12 20:08:00,541 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,543 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 18 treesize of output 14 [2021-06-12 20:08:00,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,546 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 19 treesize of output 15 [2021-06-12 20:08:00,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:00,592 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-12 20:08:00,592 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:00,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:00,593 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-12 20:08:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:00,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848537508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:00,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:00,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:00,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319253892] [2021-06-12 20:08:00,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:00,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:00,668 INFO L87 Difference]: Start difference. First operand 1410 states and 4641 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 20:08:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:01,080 INFO L93 Difference]: Finished difference Result 2137 states and 6711 transitions. [2021-06-12 20:08:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:08:01,080 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 25 [2021-06-12 20:08:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:01,083 INFO L225 Difference]: With dead ends: 2137 [2021-06-12 20:08:01,083 INFO L226 Difference]: Without dead ends: 2137 [2021-06-12 20:08:01,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-06-12 20:08:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1410. [2021-06-12 20:08:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2959545777146912) internal successors, (4644), 1409 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4644 transitions. [2021-06-12 20:08:01,100 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4644 transitions. Word has length 25 [2021-06-12 20:08:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:01,100 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4644 transitions. [2021-06-12 20:08:01,100 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 20:08:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4644 transitions. [2021-06-12 20:08:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:01,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:01,102 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:01,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5290 [2021-06-12 20:08:01,302 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1928659549, now seen corresponding path program 585 times [2021-06-12 20:08:01,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:01,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596299577] [2021-06-12 20:08:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:01,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:01,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596299577] [2021-06-12 20:08:01,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596299577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:01,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846698561] [2021-06-12 20:08:01,375 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 20:08:01,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:01,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,472 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 17 treesize of output 13 [2021-06-12 20:08:01,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,475 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 15 treesize of output 11 [2021-06-12 20:08:01,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,479 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 16 treesize of output 12 [2021-06-12 20:08:01,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:01,482 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 16 treesize of output 12 [2021-06-12 20:08:01,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:01,553 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:08:01,558 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 20:08:01,558 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:08:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:01,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846698561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:01,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:01,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914299820] [2021-06-12 20:08:01,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:01,799 INFO L87 Difference]: Start difference. First operand 1410 states and 4644 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 20:08:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:02,510 INFO L93 Difference]: Finished difference Result 2128 states and 6741 transitions. [2021-06-12 20:08:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:08:02,510 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 25 [2021-06-12 20:08:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:02,513 INFO L225 Difference]: With dead ends: 2128 [2021-06-12 20:08:02,513 INFO L226 Difference]: Without dead ends: 2100 [2021-06-12 20:08:02,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 627.0ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-12 20:08:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1409. [2021-06-12 20:08:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.2954545454545454) internal successors, (4640), 1408 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4640 transitions. [2021-06-12 20:08:02,530 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4640 transitions. Word has length 25 [2021-06-12 20:08:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:02,530 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4640 transitions. [2021-06-12 20:08:02,530 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 20:08:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4640 transitions. [2021-06-12 20:08:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:02,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:02,531 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:02,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5295,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:02,732 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1754422807, now seen corresponding path program 586 times [2021-06-12 20:08:02,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:02,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562283839] [2021-06-12 20:08:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:02,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:02,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562283839] [2021-06-12 20:08:02,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562283839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:02,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865352375] [2021-06-12 20:08:02,854 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 20:08:02,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:02,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,947 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 17 treesize of output 13 [2021-06-12 20:08:02,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,951 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 18 treesize of output 14 [2021-06-12 20:08:02,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,954 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 17 treesize of output 13 [2021-06-12 20:08:02,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:02,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:02,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:02,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:03,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:03,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-12 20:08:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:03,242 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 18 treesize of output 14 [2021-06-12 20:08:03,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:03,247 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 20:08:03,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,406 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 20:08:03,407 INFO L628 ElimStorePlain]: treesize reduction 148, result has 51.8 percent of original size [2021-06-12 20:08:03,407 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2096 vanished before elimination [2021-06-12 20:08:03,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:03,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:03,411 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 20:08:03,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,415 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 7 treesize of output 5 [2021-06-12 20:08:03,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,502 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.1 percent of original size [2021-06-12 20:08:03,505 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 10 treesize of output 8 [2021-06-12 20:08:03,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:03,545 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2094 vanished before elimination [2021-06-12 20:08:03,545 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:03,548 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 20:08:03,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:03,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:03,584 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2098 vanished before elimination [2021-06-12 20:08:03,586 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 20:08:03,586 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:321, output treesize:47 [2021-06-12 20:08:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:03,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865352375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:03,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:03,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295029997] [2021-06-12 20:08:03,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:03,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:03,674 INFO L87 Difference]: Start difference. First operand 1409 states and 4640 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 20:08:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:04,224 INFO L93 Difference]: Finished difference Result 1918 states and 6095 transitions. [2021-06-12 20:08:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:04,224 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 25 [2021-06-12 20:08:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:04,227 INFO L225 Difference]: With dead ends: 1918 [2021-06-12 20:08:04,227 INFO L226 Difference]: Without dead ends: 1894 [2021-06-12 20:08:04,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-12 20:08:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1399. [2021-06-12 20:08:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.291845493562232) internal successors, (4602), 1398 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4602 transitions. [2021-06-12 20:08:04,243 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4602 transitions. Word has length 25 [2021-06-12 20:08:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:04,243 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4602 transitions. [2021-06-12 20:08:04,243 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 20:08:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4602 transitions. [2021-06-12 20:08:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:04,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:04,245 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:04,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5315,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:04,445 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 874149271, now seen corresponding path program 587 times [2021-06-12 20:08:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:04,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681171463] [2021-06-12 20:08:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:04,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:04,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681171463] [2021-06-12 20:08:04,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681171463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:04,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445171450] [2021-06-12 20:08:04,537 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 20:08:04,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:08:04,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:04,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,658 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 16 treesize of output 12 [2021-06-12 20:08:04,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,662 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 16 treesize of output 12 [2021-06-12 20:08:04,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,668 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 20:08:04,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,672 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 15 treesize of output 11 [2021-06-12 20:08:04,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:04,772 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-12 20:08:04,780 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 20:08:04,780 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:98 [2021-06-12 20:08:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:04,962 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 16 treesize of output 12 [2021-06-12 20:08:04,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [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 17 treesize of output 13 [2021-06-12 20:08:04,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:05,059 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:08:05,059 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:05,061 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 7 treesize of output 5 [2021-06-12 20:08:05,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:05,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:05,093 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2104 vanished before elimination [2021-06-12 20:08:05,096 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 8 treesize of output 6 [2021-06-12 20:08:05,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:05,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:05,127 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2106 vanished before elimination [2021-06-12 20:08:05,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:05,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:29 [2021-06-12 20:08:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445171450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:05,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:05,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:05,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622576864] [2021-06-12 20:08:05,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:05,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:05,197 INFO L87 Difference]: Start difference. First operand 1399 states and 4602 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 20:08:05,518 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-12 20:08:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:05,993 INFO L93 Difference]: Finished difference Result 1893 states and 6075 transitions. [2021-06-12 20:08:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:08:05,993 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 25 [2021-06-12 20:08:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:05,996 INFO L225 Difference]: With dead ends: 1893 [2021-06-12 20:08:05,996 INFO L226 Difference]: Without dead ends: 1893 [2021-06-12 20:08:05,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-06-12 20:08:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1378. [2021-06-12 20:08:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.2883079157588964) internal successors, (4528), 1377 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4528 transitions. [2021-06-12 20:08:06,011 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4528 transitions. Word has length 25 [2021-06-12 20:08:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:06,012 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4528 transitions. [2021-06-12 20:08:06,012 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 20:08:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4528 transitions. [2021-06-12 20:08:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:06,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:06,013 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:06,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5329,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:06,213 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1583373285, now seen corresponding path program 588 times [2021-06-12 20:08:06,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:06,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403376048] [2021-06-12 20:08:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:06,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:06,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403376048] [2021-06-12 20:08:06,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403376048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:06,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845354128] [2021-06-12 20:08:06,288 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 20:08:06,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:06,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:06,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,381 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 17 treesize of output 13 [2021-06-12 20:08:06,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:06,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:06,387 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 16 treesize of output 12 [2021-06-12 20:08:06,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:06,466 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:08:06,471 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 20:08:06,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:08:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:06,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845354128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:06,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:06,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:06,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417790023] [2021-06-12 20:08:06,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:06,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:06,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:06,697 INFO L87 Difference]: Start difference. First operand 1378 states and 4528 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 20:08:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:07,092 INFO L93 Difference]: Finished difference Result 2043 states and 6432 transitions. [2021-06-12 20:08:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:07,092 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 25 [2021-06-12 20:08:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:07,094 INFO L225 Difference]: With dead ends: 2043 [2021-06-12 20:08:07,094 INFO L226 Difference]: Without dead ends: 2001 [2021-06-12 20:08:07,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-06-12 20:08:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1388. [2021-06-12 20:08:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.2782984859408795) internal successors, (4547), 1387 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4547 transitions. [2021-06-12 20:08:07,117 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4547 transitions. Word has length 25 [2021-06-12 20:08:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:07,117 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4547 transitions. [2021-06-12 20:08:07,117 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 20:08:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4547 transitions. [2021-06-12 20:08:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:07,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:07,118 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:07,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5346,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:07,319 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1442945125, now seen corresponding path program 589 times [2021-06-12 20:08:07,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:07,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869802379] [2021-06-12 20:08:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:07,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:07,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869802379] [2021-06-12 20:08:07,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869802379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:07,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940506774] [2021-06-12 20:08:07,390 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 20:08:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,487 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 17 treesize of output 13 [2021-06-12 20:08:07,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,491 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 16 treesize of output 12 [2021-06-12 20:08:07,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,494 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 16 treesize of output 12 [2021-06-12 20:08:07,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:07,497 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 15 treesize of output 11 [2021-06-12 20:08:07,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:07,569 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-12 20:08:07,574 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 20:08:07,574 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-12 20:08:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:07,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940506774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:07,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:07,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:07,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043127172] [2021-06-12 20:08:07,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:07,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:07,790 INFO L87 Difference]: Start difference. First operand 1388 states and 4547 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 20:08:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:08,221 INFO L93 Difference]: Finished difference Result 1978 states and 6287 transitions. [2021-06-12 20:08:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:08:08,221 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 25 [2021-06-12 20:08:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:08,224 INFO L225 Difference]: With dead ends: 1978 [2021-06-12 20:08:08,224 INFO L226 Difference]: Without dead ends: 1942 [2021-06-12 20:08:08,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:08:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-06-12 20:08:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1370. [2021-06-12 20:08:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.2863403944485023) internal successors, (4499), 1369 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4499 transitions. [2021-06-12 20:08:08,240 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4499 transitions. Word has length 25 [2021-06-12 20:08:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:08,240 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 4499 transitions. [2021-06-12 20:08:08,240 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 20:08:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4499 transitions. [2021-06-12 20:08:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:08,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:08,241 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:08,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5366 [2021-06-12 20:08:08,442 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash 931957645, now seen corresponding path program 590 times [2021-06-12 20:08:08,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:08,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791923690] [2021-06-12 20:08:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:08,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:08,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791923690] [2021-06-12 20:08:08,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791923690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:08,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246704553] [2021-06-12 20:08:08,516 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 20:08:08,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:08,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:08,578 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 24 treesize of output 18 [2021-06-12 20:08:08,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,580 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 24 treesize of output 18 [2021-06-12 20:08:08,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:08,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:08,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:08,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 20:08:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:08,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246704553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:08,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:08,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:08,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70972432] [2021-06-12 20:08:08,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:08,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:08,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:08,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:08,662 INFO L87 Difference]: Start difference. First operand 1370 states and 4499 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20:08:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:08,858 INFO L93 Difference]: Finished difference Result 1697 states and 5502 transitions. [2021-06-12 20:08:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:08,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 25 [2021-06-12 20:08:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:08,860 INFO L225 Difference]: With dead ends: 1697 [2021-06-12 20:08:08,861 INFO L226 Difference]: Without dead ends: 1655 [2021-06-12 20:08:08,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-12 20:08:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1349. [2021-06-12 20:08:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3078635014836797) internal successors, (4459), 1348 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4459 transitions. [2021-06-12 20:08:08,874 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4459 transitions. Word has length 25 [2021-06-12 20:08:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:08,874 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4459 transitions. [2021-06-12 20:08:08,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20:08:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4459 transitions. [2021-06-12 20:08:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:08,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:08,876 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:09,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5386 [2021-06-12 20:08:09,076 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:09,076 INFO L82 PathProgramCache]: Analyzing trace with hash 16517035, now seen corresponding path program 591 times [2021-06-12 20:08:09,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:09,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118623989] [2021-06-12 20:08:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:09,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:09,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118623989] [2021-06-12 20:08:09,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118623989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:09,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733452208] [2021-06-12 20:08:09,137 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 20:08:09,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:09,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:09,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:09,200 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 23 treesize of output 17 [2021-06-12 20:08:09,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:09,202 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 22 treesize of output 16 [2021-06-12 20:08:09,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:09,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:09,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:08:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:09,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733452208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:09,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:09,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:09,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856660809] [2021-06-12 20:08:09,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:09,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:09,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:09,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:09,281 INFO L87 Difference]: Start difference. First operand 1349 states and 4459 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 20:08:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:09,470 INFO L93 Difference]: Finished difference Result 1926 states and 6206 transitions. [2021-06-12 20:08:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 25 [2021-06-12 20:08:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:09,473 INFO L225 Difference]: With dead ends: 1926 [2021-06-12 20:08:09,473 INFO L226 Difference]: Without dead ends: 1917 [2021-06-12 20:08:09,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-06-12 20:08:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1355. [2021-06-12 20:08:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.307237813884786) internal successors, (4478), 1354 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4478 transitions. [2021-06-12 20:08:09,489 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4478 transitions. Word has length 25 [2021-06-12 20:08:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:09,489 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4478 transitions. [2021-06-12 20:08:09,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 20:08:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4478 transitions. [2021-06-12 20:08:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:09,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:09,490 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:09,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5389,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:09,691 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:09,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1860020883, now seen corresponding path program 592 times [2021-06-12 20:08:09,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:09,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677740734] [2021-06-12 20:08:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:09,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:09,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677740734] [2021-06-12 20:08:09,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677740734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:09,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354170137] [2021-06-12 20:08:09,776 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 20:08:09,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:09,861 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 24 treesize of output 18 [2021-06-12 20:08:09,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,864 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 24 treesize of output 18 [2021-06-12 20:08:09,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:09,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:09,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:09,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 20:08:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354170137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:09,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:09,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:09,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652415712] [2021-06-12 20:08:09,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:09,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:09,965 INFO L87 Difference]: Start difference. First operand 1355 states and 4478 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:10,147 INFO L93 Difference]: Finished difference Result 1681 states and 5480 transitions. [2021-06-12 20:08:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:10,150 INFO L225 Difference]: With dead ends: 1681 [2021-06-12 20:08:10,150 INFO L226 Difference]: Without dead ends: 1665 [2021-06-12 20:08:10,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-06-12 20:08:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1343. [2021-06-12 20:08:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.304769001490313) internal successors, (4435), 1342 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4435 transitions. [2021-06-12 20:08:10,164 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4435 transitions. Word has length 25 [2021-06-12 20:08:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:10,164 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4435 transitions. [2021-06-12 20:08:10,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4435 transitions. [2021-06-12 20:08:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:10,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:10,165 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:10,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5393,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:10,366 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash -260170605, now seen corresponding path program 593 times [2021-06-12 20:08:10,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:10,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302041649] [2021-06-12 20:08:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:10,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302041649] [2021-06-12 20:08:10,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302041649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35479869] [2021-06-12 20:08:10,424 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 20:08:10,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:10,489 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 23 treesize of output 17 [2021-06-12 20:08:10,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:08:10,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:10,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:10,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:10,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:08:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35479869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:10,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:08:10,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908433639] [2021-06-12 20:08:10,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:10,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:10,544 INFO L87 Difference]: Start difference. First operand 1343 states and 4435 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 20:08:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:10,686 INFO L93 Difference]: Finished difference Result 1903 states and 6177 transitions. [2021-06-12 20:08:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 25 [2021-06-12 20:08:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:10,689 INFO L225 Difference]: With dead ends: 1903 [2021-06-12 20:08:10,689 INFO L226 Difference]: Without dead ends: 1903 [2021-06-12 20:08:10,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-06-12 20:08:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1337. [2021-06-12 20:08:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.302395209580838) internal successors, (4412), 1336 states have internal predecessors, (4412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4412 transitions. [2021-06-12 20:08:10,714 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4412 transitions. Word has length 25 [2021-06-12 20:08:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:10,714 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4412 transitions. [2021-06-12 20:08:10,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 20:08:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4412 transitions. [2021-06-12 20:08:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:10,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:10,715 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:10,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5397 [2021-06-12 20:08:10,916 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1942306919, now seen corresponding path program 594 times [2021-06-12 20:08:10,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:10,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666707882] [2021-06-12 20:08:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:10,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:10,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666707882] [2021-06-12 20:08:10,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666707882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:10,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646010624] [2021-06-12 20:08:10,976 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 20:08:11,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:11,045 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 23 treesize of output 17 [2021-06-12 20:08:11,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:11,047 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 22 treesize of output 16 [2021-06-12 20:08:11,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:11,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:11,056 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:08:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:11,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646010624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:11,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:11,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:08:11,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116146512] [2021-06-12 20:08:11,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:11,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:11,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:11,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:11,112 INFO L87 Difference]: Start difference. First operand 1337 states and 4412 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20:08:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:11,252 INFO L93 Difference]: Finished difference Result 1885 states and 6118 transitions. [2021-06-12 20:08:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 25 [2021-06-12 20:08:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:11,255 INFO L225 Difference]: With dead ends: 1885 [2021-06-12 20:08:11,255 INFO L226 Difference]: Without dead ends: 1885 [2021-06-12 20:08:11,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-06-12 20:08:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1331. [2021-06-12 20:08:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3) internal successors, (4389), 1330 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4389 transitions. [2021-06-12 20:08:11,270 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4389 transitions. Word has length 25 [2021-06-12 20:08:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:11,270 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4389 transitions. [2021-06-12 20:08:11,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20:08:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4389 transitions. [2021-06-12 20:08:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:11,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:11,272 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:11,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5400,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:11,472 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -61553981, now seen corresponding path program 595 times [2021-06-12 20:08:11,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:11,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521796203] [2021-06-12 20:08:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:11,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:11,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521796203] [2021-06-12 20:08:11,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521796203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:11,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097197630] [2021-06-12 20:08:11,540 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 20:08:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:11,605 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 23 treesize of output 17 [2021-06-12 20:08:11,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:11,607 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 22 treesize of output 16 [2021-06-12 20:08:11,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:11,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:11,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:11,616 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-12 20:08:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:11,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097197630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:11,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:11,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:11,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918758639] [2021-06-12 20:08:11,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:11,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:11,682 INFO L87 Difference]: Start difference. First operand 1331 states and 4389 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:11,918 INFO L93 Difference]: Finished difference Result 1860 states and 6038 transitions. [2021-06-12 20:08:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:08:11,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 25 [2021-06-12 20:08:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:11,921 INFO L225 Difference]: With dead ends: 1860 [2021-06-12 20:08:11,921 INFO L226 Difference]: Without dead ends: 1860 [2021-06-12 20:08:11,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-12 20:08:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1315. [2021-06-12 20:08:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 3.3013698630136985) internal successors, (4338), 1314 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4338 transitions. [2021-06-12 20:08:11,936 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4338 transitions. Word has length 25 [2021-06-12 20:08:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:11,936 INFO L482 AbstractCegarLoop]: Abstraction has 1315 states and 4338 transitions. [2021-06-12 20:08:11,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4338 transitions. [2021-06-12 20:08:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:11,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:11,937 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:12,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5403,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:12,138 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1156252899, now seen corresponding path program 596 times [2021-06-12 20:08:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:12,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596512176] [2021-06-12 20:08:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:12,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:12,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596512176] [2021-06-12 20:08:12,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596512176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:12,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924586202] [2021-06-12 20:08:12,214 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 20:08:12,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:12,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:12,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:12,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:12,285 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 24 treesize of output 18 [2021-06-12 20:08:12,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,288 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 24 treesize of output 18 [2021-06-12 20:08:12,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:12,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:12,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-12 20:08:12,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:12,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,380 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 27 treesize of output 21 [2021-06-12 20:08:12,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:12,383 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 26 treesize of output 20 [2021-06-12 20:08:12,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:12,386 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 27 treesize of output 21 [2021-06-12 20:08:12,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:12,416 INFO L628 ElimStorePlain]: treesize reduction 47, result has 31.9 percent of original size [2021-06-12 20:08:12,416 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:12,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:12,417 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:22 [2021-06-12 20:08:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:12,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924586202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:12,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:12,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:12,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299187726] [2021-06-12 20:08:12,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:12,446 INFO L87 Difference]: Start difference. First operand 1315 states and 4338 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:12,783 INFO L93 Difference]: Finished difference Result 1686 states and 5449 transitions. [2021-06-12 20:08:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 25 [2021-06-12 20:08:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:12,785 INFO L225 Difference]: With dead ends: 1686 [2021-06-12 20:08:12,785 INFO L226 Difference]: Without dead ends: 1678 [2021-06-12 20:08:12,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-06-12 20:08:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1325. [2021-06-12 20:08:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 3.2968277945619335) internal successors, (4365), 1324 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4365 transitions. [2021-06-12 20:08:12,803 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4365 transitions. Word has length 25 [2021-06-12 20:08:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:12,803 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 4365 transitions. [2021-06-12 20:08:12,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4365 transitions. [2021-06-12 20:08:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:12,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:12,804 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:13,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5407 [2021-06-12 20:08:13,005 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1421670721, now seen corresponding path program 597 times [2021-06-12 20:08:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:13,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894376077] [2021-06-12 20:08:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:13,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:13,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894376077] [2021-06-12 20:08:13,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894376077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:13,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77501479] [2021-06-12 20:08:13,093 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 20:08:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:13,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:13,160 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 23 treesize of output 17 [2021-06-12 20:08:13,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:13,162 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 22 treesize of output 16 [2021-06-12 20:08:13,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:13,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:13,174 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:08:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77501479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:13,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:13,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:13,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335005270] [2021-06-12 20:08:13,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:13,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:13,252 INFO L87 Difference]: Start difference. First operand 1325 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:13,559 INFO L93 Difference]: Finished difference Result 1649 states and 5370 transitions. [2021-06-12 20:08:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 25 [2021-06-12 20:08:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:13,561 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 20:08:13,561 INFO L226 Difference]: Without dead ends: 1649 [2021-06-12 20:08:13,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-12 20:08:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1301. [2021-06-12 20:08:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3007692307692307) internal successors, (4291), 1300 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4291 transitions. [2021-06-12 20:08:13,576 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4291 transitions. Word has length 25 [2021-06-12 20:08:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:13,576 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4291 transitions. [2021-06-12 20:08:13,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4291 transitions. [2021-06-12 20:08:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:13,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:13,577 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:13,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5412,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:13,778 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1871082899, now seen corresponding path program 598 times [2021-06-12 20:08:13,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:13,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927916914] [2021-06-12 20:08:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:13,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927916914] [2021-06-12 20:08:13,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927916914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17803019] [2021-06-12 20:08:13,847 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 20:08:13,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:13,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:13,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:13,921 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 22 treesize of output 16 [2021-06-12 20:08:13,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:08:13,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:13,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:13,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:13,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:08:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:13,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17803019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:13,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:13,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 20:08:13,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490149502] [2021-06-12 20:08:13,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:08:13,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:08:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:13,967 INFO L87 Difference]: Start difference. First operand 1301 states and 4291 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20:08:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:14,087 INFO L93 Difference]: Finished difference Result 1438 states and 4722 transitions. [2021-06-12 20:08:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 25 [2021-06-12 20:08:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:14,089 INFO L225 Difference]: With dead ends: 1438 [2021-06-12 20:08:14,089 INFO L226 Difference]: Without dead ends: 1438 [2021-06-12 20:08:14,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:08:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-12 20:08:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1308. [2021-06-12 20:08:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.299158377964805) internal successors, (4312), 1307 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4312 transitions. [2021-06-12 20:08:14,102 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4312 transitions. Word has length 25 [2021-06-12 20:08:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:14,102 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 4312 transitions. [2021-06-12 20:08:14,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20:08:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4312 transitions. [2021-06-12 20:08:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:14,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:14,104 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:14,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5417,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:14,304 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash 331203867, now seen corresponding path program 599 times [2021-06-12 20:08:14,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:14,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098936343] [2021-06-12 20:08:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:14,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:14,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098936343] [2021-06-12 20:08:14,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098936343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:14,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551119340] [2021-06-12 20:08:14,367 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 20:08:14,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:14,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:14,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:14,442 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 22 treesize of output 16 [2021-06-12 20:08:14,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:08:14,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:14,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:14,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:14,457 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:08:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:14,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551119340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:14,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:14,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:08:14,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62573606] [2021-06-12 20:08:14,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:14,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:14,510 INFO L87 Difference]: Start difference. First operand 1308 states and 4312 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 20:08:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:14,617 INFO L93 Difference]: Finished difference Result 1514 states and 4957 transitions. [2021-06-12 20:08:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:14,618 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 25 [2021-06-12 20:08:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:14,619 INFO L225 Difference]: With dead ends: 1514 [2021-06-12 20:08:14,619 INFO L226 Difference]: Without dead ends: 1514 [2021-06-12 20:08:14,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-12 20:08:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1314. [2021-06-12 20:08:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.2977913175932976) internal successors, (4330), 1313 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4330 transitions. [2021-06-12 20:08:14,633 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4330 transitions. Word has length 25 [2021-06-12 20:08:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:14,633 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4330 transitions. [2021-06-12 20:08:14,633 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 20:08:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4330 transitions. [2021-06-12 20:08:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:14,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:14,641 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:14,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5420 [2021-06-12 20:08:14,841 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1637830377, now seen corresponding path program 600 times [2021-06-12 20:08:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618309137] [2021-06-12 20:08:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:14,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:14,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618309137] [2021-06-12 20:08:14,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618309137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825376067] [2021-06-12 20:08:14,914 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 20:08:14,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:14,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:14,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:14,995 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 24 treesize of output 18 [2021-06-12 20:08:14,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:14,997 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 24 treesize of output 18 [2021-06-12 20:08:14,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:15,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 20:08:15,051 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 26 treesize of output 20 [2021-06-12 20:08:15,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,053 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 27 treesize of output 21 [2021-06-12 20:08:15,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,086 INFO L628 ElimStorePlain]: treesize reduction 67, result has 37.4 percent of original size [2021-06-12 20:08:15,086 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:15,087 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 19 treesize of output 15 [2021-06-12 20:08:15,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:15,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2116 vanished before elimination [2021-06-12 20:08:15,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,098 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:22 [2021-06-12 20:08:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:15,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825376067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:15,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:15,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:15,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542158269] [2021-06-12 20:08:15,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:15,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:15,126 INFO L87 Difference]: Start difference. First operand 1314 states and 4330 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 20:08:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:15,346 INFO L93 Difference]: Finished difference Result 1492 states and 4847 transitions. [2021-06-12 20:08:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:15,346 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 25 [2021-06-12 20:08:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:15,348 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 20:08:15,348 INFO L226 Difference]: Without dead ends: 1478 [2021-06-12 20:08:15,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-12 20:08:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1324. [2021-06-12 20:08:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.3008314436885864) internal successors, (4367), 1323 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4367 transitions. [2021-06-12 20:08:15,361 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4367 transitions. Word has length 25 [2021-06-12 20:08:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:15,361 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4367 transitions. [2021-06-12 20:08:15,361 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 20:08:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4367 transitions. [2021-06-12 20:08:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:15,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:15,363 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:15,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5428,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:15,563 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:15,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1903248199, now seen corresponding path program 601 times [2021-06-12 20:08:15,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:15,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346340259] [2021-06-12 20:08:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:15,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:15,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346340259] [2021-06-12 20:08:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346340259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:15,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665159066] [2021-06-12 20:08:15,635 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 20:08:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:15,723 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 24 treesize of output 18 [2021-06-12 20:08:15,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,726 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 24 treesize of output 18 [2021-06-12 20:08:15,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:15,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-12 20:08:15,779 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 26 treesize of output 20 [2021-06-12 20:08:15,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,781 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 27 treesize of output 21 [2021-06-12 20:08:15,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,811 INFO L628 ElimStorePlain]: treesize reduction 78, result has 27.1 percent of original size [2021-06-12 20:08:15,811 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:15,812 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 7 treesize of output 5 [2021-06-12 20:08:15,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:15,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:15,823 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2117 vanished before elimination [2021-06-12 20:08:15,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:15,824 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:22 [2021-06-12 20:08:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665159066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:15,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:15,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:15,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603701477] [2021-06-12 20:08:15,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:15,859 INFO L87 Difference]: Start difference. First operand 1324 states and 4367 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 20:08:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:16,021 INFO L93 Difference]: Finished difference Result 1413 states and 4646 transitions. [2021-06-12 20:08:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:16,022 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 25 [2021-06-12 20:08:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:16,023 INFO L225 Difference]: With dead ends: 1413 [2021-06-12 20:08:16,023 INFO L226 Difference]: Without dead ends: 1413 [2021-06-12 20:08:16,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-12 20:08:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1289. [2021-06-12 20:08:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3035714285714284) internal successors, (4255), 1288 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4255 transitions. [2021-06-12 20:08:16,037 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4255 transitions. Word has length 25 [2021-06-12 20:08:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:16,037 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4255 transitions. [2021-06-12 20:08:16,037 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 20:08:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4255 transitions. [2021-06-12 20:08:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:16,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:16,038 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:16,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 602 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5432 [2021-06-12 20:08:16,238 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1563652661, now seen corresponding path program 602 times [2021-06-12 20:08:16,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:16,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200152025] [2021-06-12 20:08:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:16,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200152025] [2021-06-12 20:08:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200152025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546480830] [2021-06-12 20:08:16,307 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 20:08:16,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:16,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:16,382 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 22 treesize of output 16 [2021-06-12 20:08:16,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:16,384 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 23 treesize of output 17 [2021-06-12 20:08:16,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:16,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:16,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:16,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-12 20:08:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546480830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:16,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:16,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:16,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776818718] [2021-06-12 20:08:16,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:16,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:16,460 INFO L87 Difference]: Start difference. First operand 1289 states and 4255 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 20:08:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:16,711 INFO L93 Difference]: Finished difference Result 1483 states and 4811 transitions. [2021-06-12 20:08:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:16,711 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 25 [2021-06-12 20:08:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:16,713 INFO L225 Difference]: With dead ends: 1483 [2021-06-12 20:08:16,713 INFO L226 Difference]: Without dead ends: 1483 [2021-06-12 20:08:16,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-06-12 20:08:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1303. [2021-06-12 20:08:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.30568356374808) internal successors, (4304), 1302 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4304 transitions. [2021-06-12 20:08:16,726 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4304 transitions. Word has length 25 [2021-06-12 20:08:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:16,726 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4304 transitions. [2021-06-12 20:08:16,726 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 20:08:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4304 transitions. [2021-06-12 20:08:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:16,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:16,727 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:16,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5435,603 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:16,928 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1077871247, now seen corresponding path program 603 times [2021-06-12 20:08:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:16,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279772602] [2021-06-12 20:08:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:16,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:16,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279772602] [2021-06-12 20:08:16,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279772602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:16,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316571211] [2021-06-12 20:08:16,996 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 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 20:08:17,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:17,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:17,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:17,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:17,078 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 23 treesize of output 17 [2021-06-12 20:08:17,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:17,080 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 22 treesize of output 16 [2021-06-12 20:08:17,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:17,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:08:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:17,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316571211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:17,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106653181] [2021-06-12 20:08:17,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:17,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:17,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:17,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:17,150 INFO L87 Difference]: Start difference. First operand 1303 states and 4304 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 20:08:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:17,324 INFO L93 Difference]: Finished difference Result 1581 states and 5101 transitions. [2021-06-12 20:08:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:17,324 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 25 [2021-06-12 20:08:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:17,326 INFO L225 Difference]: With dead ends: 1581 [2021-06-12 20:08:17,326 INFO L226 Difference]: Without dead ends: 1581 [2021-06-12 20:08:17,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-06-12 20:08:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1310. [2021-06-12 20:08:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.3200916730328496) internal successors, (4346), 1309 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4346 transitions. [2021-06-12 20:08:17,340 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4346 transitions. Word has length 25 [2021-06-12 20:08:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:17,340 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4346 transitions. [2021-06-12 20:08:17,340 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 20:08:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4346 transitions. [2021-06-12 20:08:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:17,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:17,341 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:17,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5440,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:17,541 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1945260615, now seen corresponding path program 604 times [2021-06-12 20:08:17,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:17,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545708727] [2021-06-12 20:08:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545708727] [2021-06-12 20:08:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545708727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805535220] [2021-06-12 20:08:17,608 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 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 20:08:17,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:17,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:17,699 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 23 treesize of output 17 [2021-06-12 20:08:17,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:17,701 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 22 treesize of output 16 [2021-06-12 20:08:17,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:17,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:17,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:08:17,751 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 24 treesize of output 18 [2021-06-12 20:08:17,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,753 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 24 treesize of output 18 [2021-06-12 20:08:17,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,765 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-06-12 20:08:17,765 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:17,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:08:17,765 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-06-12 20:08:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805535220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798099236] [2021-06-12 20:08:17,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:17,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:17,781 INFO L87 Difference]: Start difference. First operand 1310 states and 4346 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 20:08:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:17,991 INFO L93 Difference]: Finished difference Result 1458 states and 4771 transitions. [2021-06-12 20:08:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:17,991 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 25 [2021-06-12 20:08:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:17,993 INFO L225 Difference]: With dead ends: 1458 [2021-06-12 20:08:17,993 INFO L226 Difference]: Without dead ends: 1458 [2021-06-12 20:08:17,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-06-12 20:08:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1303. [2021-06-12 20:08:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.3110599078341014) internal successors, (4311), 1302 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4311 transitions. [2021-06-12 20:08:18,006 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4311 transitions. Word has length 25 [2021-06-12 20:08:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:18,006 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4311 transitions. [2021-06-12 20:08:18,006 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 20:08:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4311 transitions. [2021-06-12 20:08:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:18,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:18,007 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:18,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5450 [2021-06-12 20:08:18,208 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash -333975085, now seen corresponding path program 605 times [2021-06-12 20:08:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:18,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078982256] [2021-06-12 20:08:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:18,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:18,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078982256] [2021-06-12 20:08:18,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078982256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:18,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649983935] [2021-06-12 20:08:18,277 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 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 20:08:18,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:18,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:18,353 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 23 treesize of output 17 [2021-06-12 20:08:18,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:18,356 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 22 treesize of output 16 [2021-06-12 20:08:18,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:18,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:18,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:18,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-06-12 20:08:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649983935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:18,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:18,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 20:08:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680488920] [2021-06-12 20:08:18,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:08:18,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:08:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:08:18,425 INFO L87 Difference]: Start difference. First operand 1303 states and 4311 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 20:08:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:18,661 INFO L93 Difference]: Finished difference Result 1414 states and 4626 transitions. [2021-06-12 20:08:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:08:18,661 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 25 [2021-06-12 20:08:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:18,663 INFO L225 Difference]: With dead ends: 1414 [2021-06-12 20:08:18,663 INFO L226 Difference]: Without dead ends: 1384 [2021-06-12 20:08:18,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-12 20:08:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1303. [2021-06-12 20:08:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.30568356374808) internal successors, (4304), 1302 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4304 transitions. [2021-06-12 20:08:18,675 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4304 transitions. Word has length 25 [2021-06-12 20:08:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:18,676 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4304 transitions. [2021-06-12 20:08:18,676 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 20:08:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4304 transitions. [2021-06-12 20:08:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:18,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:18,677 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:18,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5452 [2021-06-12 20:08:18,877 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1540929083, now seen corresponding path program 606 times [2021-06-12 20:08:18,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:18,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122823357] [2021-06-12 20:08:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:18,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:18,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122823357] [2021-06-12 20:08:18,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122823357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:18,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759708678] [2021-06-12 20:08:18,956 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 20:08:18,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,077 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 16 treesize of output 12 [2021-06-12 20:08:19,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,080 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 16 treesize of output 12 [2021-06-12 20:08:19,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,084 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 15 treesize of output 11 [2021-06-12 20:08:19,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:19,087 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 17 treesize of output 13 [2021-06-12 20:08:19,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:19,168 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:19,173 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 20:08:19,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:19,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759708678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:19,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:19,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:19,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134339754] [2021-06-12 20:08:19,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:19,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:19,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:19,378 INFO L87 Difference]: Start difference. First operand 1303 states and 4304 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:19,672 INFO L93 Difference]: Finished difference Result 1569 states and 5111 transitions. [2021-06-12 20:08:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:19,674 INFO L225 Difference]: With dead ends: 1569 [2021-06-12 20:08:19,674 INFO L226 Difference]: Without dead ends: 1569 [2021-06-12 20:08:19,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-06-12 20:08:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1330. [2021-06-12 20:08:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.310007524454477) internal successors, (4399), 1329 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4399 transitions. [2021-06-12 20:08:19,688 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4399 transitions. Word has length 25 [2021-06-12 20:08:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:19,688 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4399 transitions. [2021-06-12 20:08:19,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4399 transitions. [2021-06-12 20:08:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:19,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:19,689 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:19,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5457 [2021-06-12 20:08:19,890 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -197042733, now seen corresponding path program 607 times [2021-06-12 20:08:19,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:19,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556934333] [2021-06-12 20:08:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:19,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:19,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556934333] [2021-06-12 20:08:19,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556934333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:19,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397184806] [2021-06-12 20:08:19,970 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 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 20:08:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:20,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,103 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 16 treesize of output 12 [2021-06-12 20:08:20,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,107 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 20:08:20,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:20,110 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 16 treesize of output 12 [2021-06-12 20:08:20,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:20,191 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:20,196 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 20:08:20,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:20,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397184806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:20,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:20,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:20,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682947969] [2021-06-12 20:08:20,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:20,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:20,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:20,408 INFO L87 Difference]: Start difference. First operand 1330 states and 4399 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:20,697 INFO L93 Difference]: Finished difference Result 1761 states and 5585 transitions. [2021-06-12 20:08:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:08:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:20,700 INFO L225 Difference]: With dead ends: 1761 [2021-06-12 20:08:20,700 INFO L226 Difference]: Without dead ends: 1761 [2021-06-12 20:08:20,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-06-12 20:08:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1335. [2021-06-12 20:08:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.317091454272864) internal successors, (4425), 1334 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4425 transitions. [2021-06-12 20:08:20,715 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4425 transitions. Word has length 25 [2021-06-12 20:08:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:20,715 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4425 transitions. [2021-06-12 20:08:20,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4425 transitions. [2021-06-12 20:08:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:20,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:20,717 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:20,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5464 [2021-06-12 20:08:20,917 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1683517155, now seen corresponding path program 608 times [2021-06-12 20:08:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:20,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106605942] [2021-06-12 20:08:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:20,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:20,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106605942] [2021-06-12 20:08:20,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106605942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:20,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763262733] [2021-06-12 20:08:20,987 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 20:08:21,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:21,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:21,061 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 16 treesize of output 12 [2021-06-12 20:08:21,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,063 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 16 treesize of output 12 [2021-06-12 20:08:21,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,065 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 15 treesize of output 11 [2021-06-12 20:08:21,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,067 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 17 treesize of output 13 [2021-06-12 20:08:21,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,099 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-06-12 20:08:21,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:21,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-06-12 20:08:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:21,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:21,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,190 INFO L628 ElimStorePlain]: treesize reduction 66, result has 30.5 percent of original size [2021-06-12 20:08:21,190 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:21,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:21,202 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2128 vanished before elimination [2021-06-12 20:08:21,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:21,203 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:109, output treesize:22 [2021-06-12 20:08:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:21,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763262733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:21,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:21,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:21,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005550275] [2021-06-12 20:08:21,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:21,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:21,234 INFO L87 Difference]: Start difference. First operand 1335 states and 4425 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:21,406 INFO L93 Difference]: Finished difference Result 1572 states and 5081 transitions. [2021-06-12 20:08:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:08:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:21,408 INFO L225 Difference]: With dead ends: 1572 [2021-06-12 20:08:21,408 INFO L226 Difference]: Without dead ends: 1548 [2021-06-12 20:08:21,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-06-12 20:08:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1321. [2021-06-12 20:08:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.315151515151515) internal successors, (4376), 1320 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4376 transitions. [2021-06-12 20:08:21,422 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4376 transitions. Word has length 25 [2021-06-12 20:08:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:21,422 INFO L482 AbstractCegarLoop]: Abstraction has 1321 states and 4376 transitions. [2021-06-12 20:08:21,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4376 transitions. [2021-06-12 20:08:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:21,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:21,423 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:21,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5483 [2021-06-12 20:08:21,624 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash 190356525, now seen corresponding path program 609 times [2021-06-12 20:08:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:21,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017416155] [2021-06-12 20:08:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:21,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:21,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017416155] [2021-06-12 20:08:21,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017416155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:21,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141917741] [2021-06-12 20:08:21,712 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 20:08:21,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:21,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:21,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,862 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 15 treesize of output 11 [2021-06-12 20:08:21,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,865 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 16 treesize of output 12 [2021-06-12 20:08:21,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,869 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 17 treesize of output 13 [2021-06-12 20:08:21,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:21,872 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 16 treesize of output 12 [2021-06-12 20:08:21,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:21,966 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:08:21,981 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 20:08:21,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:110 [2021-06-12 20:08:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:22,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141917741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:22,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:22,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:22,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219605618] [2021-06-12 20:08:22,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:22,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:22,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:22,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:22,147 INFO L87 Difference]: Start difference. First operand 1321 states and 4376 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 20:08:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:22,543 INFO L93 Difference]: Finished difference Result 1503 states and 4847 transitions. [2021-06-12 20:08:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:22,544 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 25 [2021-06-12 20:08:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:22,545 INFO L225 Difference]: With dead ends: 1503 [2021-06-12 20:08:22,545 INFO L226 Difference]: Without dead ends: 1475 [2021-06-12 20:08:22,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-12 20:08:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1339. [2021-06-12 20:08:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.29745889387145) internal successors, (4412), 1338 states have internal predecessors, (4412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4412 transitions. [2021-06-12 20:08:22,558 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4412 transitions. Word has length 25 [2021-06-12 20:08:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:22,559 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4412 transitions. [2021-06-12 20:08:22,559 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 20:08:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4412 transitions. [2021-06-12 20:08:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:22,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:22,560 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:22,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5490,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:22,760 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1577118895, now seen corresponding path program 610 times [2021-06-12 20:08:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:22,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903122823] [2021-06-12 20:08:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:22,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:22,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903122823] [2021-06-12 20:08:22,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903122823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:22,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286622948] [2021-06-12 20:08:22,850 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 20:08:22,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:22,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:22,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,974 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 18 treesize of output 14 [2021-06-12 20:08:22,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,977 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 18 treesize of output 14 [2021-06-12 20:08:22,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,981 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 17 treesize of output 13 [2021-06-12 20:08:22,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:22,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:22,984 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 20:08:22,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:23,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:23,042 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 20:08:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:23,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286622948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:23,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:23,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:23,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176166927] [2021-06-12 20:08:23,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:23,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:23,224 INFO L87 Difference]: Start difference. First operand 1339 states and 4412 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 20:08:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:23,515 INFO L93 Difference]: Finished difference Result 1488 states and 4833 transitions. [2021-06-12 20:08:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:23,516 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 25 [2021-06-12 20:08:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:23,517 INFO L225 Difference]: With dead ends: 1488 [2021-06-12 20:08:23,517 INFO L226 Difference]: Without dead ends: 1448 [2021-06-12 20:08:23,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-06-12 20:08:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1342. [2021-06-12 20:08:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.294556301267711) internal successors, (4418), 1341 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4418 transitions. [2021-06-12 20:08:23,531 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4418 transitions. Word has length 25 [2021-06-12 20:08:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:23,531 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4418 transitions. [2021-06-12 20:08:23,531 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 20:08:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4418 transitions. [2021-06-12 20:08:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:23,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:23,532 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:23,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5508 [2021-06-12 20:08:23,733 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:23,733 INFO L82 PathProgramCache]: Analyzing trace with hash -266546501, now seen corresponding path program 611 times [2021-06-12 20:08:23,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:23,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588707133] [2021-06-12 20:08:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:23,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588707133] [2021-06-12 20:08:23,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588707133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645663508] [2021-06-12 20:08:23,818 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 20:08:23,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:08:23,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:23,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,947 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 15 treesize of output 11 [2021-06-12 20:08:23,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:23,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,954 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 17 treesize of output 13 [2021-06-12 20:08:23,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:23,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:23,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:23,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,038 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:24,043 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 20:08:24,043 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:24,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645663508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:24,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:24,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:24,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904840629] [2021-06-12 20:08:24,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:24,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:24,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:24,239 INFO L87 Difference]: Start difference. First operand 1342 states and 4418 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:24,514 INFO L93 Difference]: Finished difference Result 1601 states and 5204 transitions. [2021-06-12 20:08:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:24,517 INFO L225 Difference]: With dead ends: 1601 [2021-06-12 20:08:24,517 INFO L226 Difference]: Without dead ends: 1601 [2021-06-12 20:08:24,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-06-12 20:08:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1348. [2021-06-12 20:08:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.291759465478842) internal successors, (4434), 1347 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4434 transitions. [2021-06-12 20:08:24,530 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4434 transitions. Word has length 25 [2021-06-12 20:08:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:24,530 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4434 transitions. [2021-06-12 20:08:24,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4434 transitions. [2021-06-12 20:08:24,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:24,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:24,532 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:24,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5516 [2021-06-12 20:08:24,732 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1681920813, now seen corresponding path program 612 times [2021-06-12 20:08:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:24,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498483293] [2021-06-12 20:08:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:24,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:24,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498483293] [2021-06-12 20:08:24,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498483293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:24,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140459972] [2021-06-12 20:08:24,810 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 20:08:24,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:24,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,931 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 15 treesize of output 11 [2021-06-12 20:08:24,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:24,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,938 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 16 treesize of output 12 [2021-06-12 20:08:24,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:24,941 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 17 treesize of output 13 [2021-06-12 20:08:24,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:25,025 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:25,030 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 20:08:25,030 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140459972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:25,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:25,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:25,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934246282] [2021-06-12 20:08:25,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:25,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:25,286 INFO L87 Difference]: Start difference. First operand 1348 states and 4434 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:25,655 INFO L93 Difference]: Finished difference Result 1674 states and 5391 transitions. [2021-06-12 20:08:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:25,657 INFO L225 Difference]: With dead ends: 1674 [2021-06-12 20:08:25,657 INFO L226 Difference]: Without dead ends: 1674 [2021-06-12 20:08:25,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-12 20:08:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1361. [2021-06-12 20:08:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3036764705882353) internal successors, (4493), 1360 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4493 transitions. [2021-06-12 20:08:25,672 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4493 transitions. Word has length 25 [2021-06-12 20:08:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:25,672 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4493 transitions. [2021-06-12 20:08:25,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4493 transitions. [2021-06-12 20:08:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:25,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:25,674 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:25,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5527,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:25,874 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:25,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1518347565, now seen corresponding path program 613 times [2021-06-12 20:08:25,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:25,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593934433] [2021-06-12 20:08:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:25,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593934433] [2021-06-12 20:08:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593934433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812355824] [2021-06-12 20:08:25,966 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 20:08:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:25,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:25,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:26,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:26,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,087 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 18 treesize of output 14 [2021-06-12 20:08:26,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,099 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 18 treesize of output 14 [2021-06-12 20:08:26,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,102 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 20:08:26,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:26,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:26,160 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 20:08:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,385 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 18 treesize of output 14 [2021-06-12 20:08:26,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:26,388 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 17 treesize of output 13 [2021-06-12 20:08:26,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,444 INFO L628 ElimStorePlain]: treesize reduction 86, result has 38.1 percent of original size [2021-06-12 20:08:26,446 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 9 treesize of output 7 [2021-06-12 20:08:26,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:26,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:26,463 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:26,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2153 vanished before elimination [2021-06-12 20:08:26,464 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 20:08:26,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:153, output treesize:22 [2021-06-12 20:08:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:26,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812355824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:26,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:26,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:26,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013646181] [2021-06-12 20:08:26,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:26,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:26,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:26,495 INFO L87 Difference]: Start difference. First operand 1361 states and 4493 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 20:08:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:26,834 INFO L93 Difference]: Finished difference Result 1603 states and 5168 transitions. [2021-06-12 20:08:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:08:26,834 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 25 [2021-06-12 20:08:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:26,836 INFO L225 Difference]: With dead ends: 1603 [2021-06-12 20:08:26,836 INFO L226 Difference]: Without dead ends: 1589 [2021-06-12 20:08:26,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-12 20:08:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1370. [2021-06-12 20:08:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.2972972972972974) internal successors, (4514), 1369 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4514 transitions. [2021-06-12 20:08:26,850 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4514 transitions. Word has length 25 [2021-06-12 20:08:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:26,850 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 4514 transitions. [2021-06-12 20:08:26,850 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 20:08:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4514 transitions. [2021-06-12 20:08:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:26,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:26,851 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:27,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5540,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:27,051 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:27,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1252929743, now seen corresponding path program 614 times [2021-06-12 20:08:27,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:27,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676952158] [2021-06-12 20:08:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:27,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676952158] [2021-06-12 20:08:27,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676952158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122049220] [2021-06-12 20:08:27,142 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 20:08:27,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:27,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:27,215 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 20:08:27,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,218 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 18 treesize of output 14 [2021-06-12 20:08:27,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,220 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 18 treesize of output 14 [2021-06-12 20:08:27,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,222 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 17 treesize of output 13 [2021-06-12 20:08:27,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:27,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:27,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-12 20:08:27,335 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 17 treesize of output 13 [2021-06-12 20:08:27,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,340 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 18 treesize of output 14 [2021-06-12 20:08:27,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,370 INFO L628 ElimStorePlain]: treesize reduction 64, result has 32.6 percent of original size [2021-06-12 20:08:27,371 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 9 treesize of output 7 [2021-06-12 20:08:27,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:27,382 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:27,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2156 vanished before elimination [2021-06-12 20:08:27,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:27,382 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:109, output treesize:22 [2021-06-12 20:08:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:27,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122049220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:27,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:27,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:27,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432385056] [2021-06-12 20:08:27,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:27,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:27,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:27,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:27,419 INFO L87 Difference]: Start difference. First operand 1370 states and 4514 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 20:08:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:27,567 INFO L93 Difference]: Finished difference Result 1561 states and 5077 transitions. [2021-06-12 20:08:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:27,567 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 25 [2021-06-12 20:08:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:27,569 INFO L225 Difference]: With dead ends: 1561 [2021-06-12 20:08:27,569 INFO L226 Difference]: Without dead ends: 1561 [2021-06-12 20:08:27,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-06-12 20:08:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1349. [2021-06-12 20:08:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.2967359050445104) internal successors, (4444), 1348 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4444 transitions. [2021-06-12 20:08:27,591 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4444 transitions. Word has length 25 [2021-06-12 20:08:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:27,592 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4444 transitions. [2021-06-12 20:08:27,592 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 20:08:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4444 transitions. [2021-06-12 20:08:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:27,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:27,593 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:27,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5550 [2021-06-12 20:08:27,793 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1253274315, now seen corresponding path program 615 times [2021-06-12 20:08:27,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:27,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880309492] [2021-06-12 20:08:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:27,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880309492] [2021-06-12 20:08:27,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880309492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074913703] [2021-06-12 20:08:27,868 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 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 20:08:27,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:27,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:27,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,988 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 16 treesize of output 12 [2021-06-12 20:08:27,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,991 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 16 treesize of output 12 [2021-06-12 20:08:27,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,995 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 17 treesize of output 13 [2021-06-12 20:08:27,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:27,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:27,998 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 15 treesize of output 11 [2021-06-12 20:08:27,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,081 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:28,086 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 20:08:28,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:28,277 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 18 treesize of output 14 [2021-06-12 20:08:28,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:28,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:28,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,348 INFO L628 ElimStorePlain]: treesize reduction 88, result has 41.7 percent of original size [2021-06-12 20:08:28,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2162 vanished before elimination [2021-06-12 20:08:28,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:28,351 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 17 treesize of output 13 [2021-06-12 20:08:28,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:28,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:28,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:28,374 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 9 treesize of output 5 [2021-06-12 20:08:28,375 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:28,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:28,396 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 20:08:28,396 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:165, output treesize:22 [2021-06-12 20:08:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:28,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074913703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:28,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:28,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:28,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776305670] [2021-06-12 20:08:28,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:28,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:28,426 INFO L87 Difference]: Start difference. First operand 1349 states and 4444 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 20:08:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:28,707 INFO L93 Difference]: Finished difference Result 1570 states and 5081 transitions. [2021-06-12 20:08:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:28,708 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 25 [2021-06-12 20:08:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:28,709 INFO L225 Difference]: With dead ends: 1570 [2021-06-12 20:08:28,710 INFO L226 Difference]: Without dead ends: 1542 [2021-06-12 20:08:28,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-06-12 20:08:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1335. [2021-06-12 20:08:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.2946026986506745) internal successors, (4395), 1334 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4395 transitions. [2021-06-12 20:08:28,723 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4395 transitions. Word has length 25 [2021-06-12 20:08:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:28,723 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4395 transitions. [2021-06-12 20:08:28,723 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 20:08:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4395 transitions. [2021-06-12 20:08:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:28,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:28,725 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:28,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5554,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:28,925 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1050716311, now seen corresponding path program 616 times [2021-06-12 20:08:28,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:28,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574259347] [2021-06-12 20:08:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:29,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574259347] [2021-06-12 20:08:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574259347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289485626] [2021-06-12 20:08:29,006 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 20:08:29,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,133 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 15 treesize of output 11 [2021-06-12 20:08:29,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,137 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 16 treesize of output 12 [2021-06-12 20:08:29,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,140 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 16 treesize of output 12 [2021-06-12 20:08:29,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:29,143 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 17 treesize of output 13 [2021-06-12 20:08:29,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:29,227 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:29,239 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 20:08:29,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289485626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:29,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:29,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668426809] [2021-06-12 20:08:29,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:29,428 INFO L87 Difference]: Start difference. First operand 1335 states and 4395 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:29,796 INFO L93 Difference]: Finished difference Result 1875 states and 5918 transitions. [2021-06-12 20:08:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:08:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:29,799 INFO L225 Difference]: With dead ends: 1875 [2021-06-12 20:08:29,799 INFO L226 Difference]: Without dead ends: 1875 [2021-06-12 20:08:29,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:29,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-12 20:08:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1349. [2021-06-12 20:08:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.311572700296736) internal successors, (4464), 1348 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4464 transitions. [2021-06-12 20:08:29,815 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4464 transitions. Word has length 25 [2021-06-12 20:08:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:29,815 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4464 transitions. [2021-06-12 20:08:29,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4464 transitions. [2021-06-12 20:08:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:29,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:29,817 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5562 [2021-06-12 20:08:30,017 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1757776563, now seen corresponding path program 617 times [2021-06-12 20:08:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590301339] [2021-06-12 20:08:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:30,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590301339] [2021-06-12 20:08:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590301339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675668541] [2021-06-12 20:08:30,099 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 20:08:30,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:30,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,226 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 16 treesize of output 12 [2021-06-12 20:08:30,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:30,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,233 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 15 treesize of output 11 [2021-06-12 20:08:30,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:30,236 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 16 treesize of output 12 [2021-06-12 20:08:30,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:30,317 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:30,322 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 20:08:30,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:30,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675668541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:30,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:30,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:30,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516433281] [2021-06-12 20:08:30,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:30,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:30,519 INFO L87 Difference]: Start difference. First operand 1349 states and 4464 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:31,028 INFO L93 Difference]: Finished difference Result 1737 states and 5534 transitions. [2021-06-12 20:08:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:08:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:08:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:31,030 INFO L225 Difference]: With dead ends: 1737 [2021-06-12 20:08:31,030 INFO L226 Difference]: Without dead ends: 1713 [2021-06-12 20:08:31,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:08:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-12 20:08:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1344. [2021-06-12 20:08:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.304542069992554) internal successors, (4438), 1343 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4438 transitions. [2021-06-12 20:08:31,045 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4438 transitions. Word has length 25 [2021-06-12 20:08:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:31,045 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4438 transitions. [2021-06-12 20:08:31,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4438 transitions. [2021-06-12 20:08:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:31,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:31,046 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:31,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5581 [2021-06-12 20:08:31,247 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash 422657591, now seen corresponding path program 618 times [2021-06-12 20:08:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:31,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976361153] [2021-06-12 20:08:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:31,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976361153] [2021-06-12 20:08:31,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976361153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701359771] [2021-06-12 20:08:31,330 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 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 20:08:31,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,476 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 16 treesize of output 12 [2021-06-12 20:08:31,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,479 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 16 treesize of output 12 [2021-06-12 20:08:31,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,483 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 20:08:31,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,486 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 15 treesize of output 11 [2021-06-12 20:08:31,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,575 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:31,582 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 20:08:31,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:95 [2021-06-12 20:08:31,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,699 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 16 treesize of output 12 [2021-06-12 20:08:31,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:31,703 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 20:08:31,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,781 INFO L628 ElimStorePlain]: treesize reduction 109, result has 41.4 percent of original size [2021-06-12 20:08:31,784 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 7 treesize of output 5 [2021-06-12 20:08:31,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:31,811 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:31,814 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 8 treesize of output 6 [2021-06-12 20:08:31,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:31,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:31,840 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2175 vanished before elimination [2021-06-12 20:08:31,840 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2178 vanished before elimination [2021-06-12 20:08:31,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:31,841 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:209, output treesize:29 [2021-06-12 20:08:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:31,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701359771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:31,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:31,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:31,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947575752] [2021-06-12 20:08:31,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:31,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:31,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:31,882 INFO L87 Difference]: Start difference. First operand 1344 states and 4438 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 20:08:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:32,507 INFO L93 Difference]: Finished difference Result 1749 states and 5479 transitions. [2021-06-12 20:08:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:08:32,507 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 25 [2021-06-12 20:08:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:32,509 INFO L225 Difference]: With dead ends: 1749 [2021-06-12 20:08:32,509 INFO L226 Difference]: Without dead ends: 1723 [2021-06-12 20:08:32,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2021-06-12 20:08:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1383. [2021-06-12 20:08:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 3.2945007235890014) internal successors, (4553), 1382 states have internal predecessors, (4553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 4553 transitions. [2021-06-12 20:08:32,524 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 4553 transitions. Word has length 25 [2021-06-12 20:08:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:32,524 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 4553 transitions. [2021-06-12 20:08:32,524 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 20:08:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 4553 transitions. [2021-06-12 20:08:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:32,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:32,526 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:32,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5605 [2021-06-12 20:08:32,726 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1315314225, now seen corresponding path program 619 times [2021-06-12 20:08:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:32,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399833578] [2021-06-12 20:08:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:32,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:32,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399833578] [2021-06-12 20:08:32,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399833578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:32,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176000826] [2021-06-12 20:08:32,808 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 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 20:08:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:32,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,924 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 18 treesize of output 14 [2021-06-12 20:08:32,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:32,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,931 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 20:08:32,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:32,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:32,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:32,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:32,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 20:08:33,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:33,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:33,129 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 18 treesize of output 14 [2021-06-12 20:08:33,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:33,133 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 17 treesize of output 13 [2021-06-12 20:08:33,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,291 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-06-12 20:08:33,292 INFO L628 ElimStorePlain]: treesize reduction 152, result has 50.5 percent of original size [2021-06-12 20:08:33,295 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 8 treesize of output 6 [2021-06-12 20:08:33,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:33,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2188 vanished before elimination [2021-06-12 20:08:33,356 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:33,359 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 7 treesize of output 5 [2021-06-12 20:08:33,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 20:08:33,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,443 INFO L628 ElimStorePlain]: treesize reduction 24, result has 80.3 percent of original size [2021-06-12 20:08:33,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2186 vanished before elimination [2021-06-12 20:08:33,446 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 7 treesize of output 5 [2021-06-12 20:08:33,446 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:33,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:33,482 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2190 vanished before elimination [2021-06-12 20:08:33,484 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 20:08:33,484 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:321, output treesize:47 [2021-06-12 20:08:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:33,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176000826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:33,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:33,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:33,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366122749] [2021-06-12 20:08:33,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:33,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:33,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:33,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:33,549 INFO L87 Difference]: Start difference. First operand 1383 states and 4553 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 20:08:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:33,948 INFO L93 Difference]: Finished difference Result 1696 states and 5361 transitions. [2021-06-12 20:08:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:33,949 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 25 [2021-06-12 20:08:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:33,950 INFO L225 Difference]: With dead ends: 1696 [2021-06-12 20:08:33,950 INFO L226 Difference]: Without dead ends: 1658 [2021-06-12 20:08:33,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-06-12 20:08:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1369. [2021-06-12 20:08:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.2997076023391814) internal successors, (4514), 1368 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 4514 transitions. [2021-06-12 20:08:33,965 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 4514 transitions. Word has length 25 [2021-06-12 20:08:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:33,966 INFO L482 AbstractCegarLoop]: Abstraction has 1369 states and 4514 transitions. [2021-06-12 20:08:33,966 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 20:08:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 4514 transitions. [2021-06-12 20:08:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:33,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:33,967 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:34,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5623,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:34,167 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1109021975, now seen corresponding path program 620 times [2021-06-12 20:08:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:34,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460044346] [2021-06-12 20:08:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:34,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:34,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460044346] [2021-06-12 20:08:34,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460044346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:34,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795058652] [2021-06-12 20:08:34,247 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 20:08:34,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:34,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:34,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,373 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 16 treesize of output 12 [2021-06-12 20:08:34,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:34,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,380 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 16 treesize of output 12 [2021-06-12 20:08:34,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:34,383 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 20:08:34,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:34,467 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:34,472 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 20:08:34,472 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:34,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795058652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:34,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:34,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:34,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830183100] [2021-06-12 20:08:34,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:34,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:34,689 INFO L87 Difference]: Start difference. First operand 1369 states and 4514 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:35,323 INFO L93 Difference]: Finished difference Result 1836 states and 5809 transitions. [2021-06-12 20:08:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:08:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:35,325 INFO L225 Difference]: With dead ends: 1836 [2021-06-12 20:08:35,325 INFO L226 Difference]: Without dead ends: 1836 [2021-06-12 20:08:35,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:08:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-06-12 20:08:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1376. [2021-06-12 20:08:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.3047272727272725) internal successors, (4544), 1375 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4544 transitions. [2021-06-12 20:08:35,341 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4544 transitions. Word has length 25 [2021-06-12 20:08:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:35,341 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4544 transitions. [2021-06-12 20:08:35,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4544 transitions. [2021-06-12 20:08:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:35,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:35,343 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:35,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5637,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:35,543 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1096018249, now seen corresponding path program 621 times [2021-06-12 20:08:35,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:35,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453389257] [2021-06-12 20:08:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:35,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:35,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453389257] [2021-06-12 20:08:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453389257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:35,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740021008] [2021-06-12 20:08:35,626 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 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 20:08:35,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:08:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:35,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,787 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 16 treesize of output 12 [2021-06-12 20:08:35,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,801 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 15 treesize of output 11 [2021-06-12 20:08:35,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,806 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 16 treesize of output 12 [2021-06-12 20:08:35,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:35,810 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 17 treesize of output 13 [2021-06-12 20:08:35,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:35,907 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:08:35,915 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 20:08:35,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:110 [2021-06-12 20:08:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:36,039 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 16 treesize of output 12 [2021-06-12 20:08:36,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:36,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:36,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,133 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:08:36,136 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 8 treesize of output 6 [2021-06-12 20:08:36,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:36,168 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:36,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:36,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:36,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:36,200 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2200 vanished before elimination [2021-06-12 20:08:36,200 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2201 vanished before elimination [2021-06-12 20:08:36,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:36,201 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:29 [2021-06-12 20:08:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:36,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740021008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:36,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:36,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:36,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523207918] [2021-06-12 20:08:36,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:36,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:36,266 INFO L87 Difference]: Start difference. First operand 1376 states and 4544 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 20:08:36,492 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-12 20:08:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:36,842 INFO L93 Difference]: Finished difference Result 1788 states and 5638 transitions. [2021-06-12 20:08:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:36,842 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 25 [2021-06-12 20:08:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:36,844 INFO L225 Difference]: With dead ends: 1788 [2021-06-12 20:08:36,844 INFO L226 Difference]: Without dead ends: 1780 [2021-06-12 20:08:36,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:08:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-12 20:08:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1371. [2021-06-12 20:08:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3043795620437955) internal successors, (4527), 1370 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4527 transitions. [2021-06-12 20:08:36,860 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4527 transitions. Word has length 25 [2021-06-12 20:08:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:36,860 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4527 transitions. [2021-06-12 20:08:36,860 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 20:08:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4527 transitions. [2021-06-12 20:08:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:36,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:36,861 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:37,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5660 [2021-06-12 20:08:37,062 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1165312567, now seen corresponding path program 622 times [2021-06-12 20:08:37,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:37,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365859034] [2021-06-12 20:08:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:37,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:37,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365859034] [2021-06-12 20:08:37,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365859034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:37,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750959293] [2021-06-12 20:08:37,147 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 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 20:08:37,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:37,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,271 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 18 treesize of output 14 [2021-06-12 20:08:37,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,275 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 18 treesize of output 14 [2021-06-12 20:08:37,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:37,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:37,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:37,339 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 20:08:37,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,464 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 20:08:37,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,469 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 18 treesize of output 14 [2021-06-12 20:08:37,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,624 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-12 20:08:37,625 INFO L628 ElimStorePlain]: treesize reduction 150, result has 51.1 percent of original size [2021-06-12 20:08:37,628 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 9 treesize of output 7 [2021-06-12 20:08:37,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2210 vanished before elimination [2021-06-12 20:08:37,687 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:37,690 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 8 treesize of output 6 [2021-06-12 20:08:37,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:37,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2214 vanished before elimination [2021-06-12 20:08:37,750 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 7 treesize of output 5 [2021-06-12 20:08:37,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:37,754 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 20:08:37,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:37,831 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.1 percent of original size [2021-06-12 20:08:37,831 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2212 vanished before elimination [2021-06-12 20:08:37,832 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 20:08:37,832 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:321, output treesize:47 [2021-06-12 20:08:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:37,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750959293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:37,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:37,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:37,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119491872] [2021-06-12 20:08:37,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:37,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:37,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:37,938 INFO L87 Difference]: Start difference. First operand 1371 states and 4527 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 20:08:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:38,261 INFO L93 Difference]: Finished difference Result 1816 states and 5753 transitions. [2021-06-12 20:08:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:38,261 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 25 [2021-06-12 20:08:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:38,263 INFO L225 Difference]: With dead ends: 1816 [2021-06-12 20:08:38,264 INFO L226 Difference]: Without dead ends: 1816 [2021-06-12 20:08:38,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-12 20:08:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1377. [2021-06-12 20:08:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 3.309593023255814) internal successors, (4554), 1376 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 4554 transitions. [2021-06-12 20:08:38,279 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 4554 transitions. Word has length 25 [2021-06-12 20:08:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:38,279 INFO L482 AbstractCegarLoop]: Abstraction has 1377 states and 4554 transitions. [2021-06-12 20:08:38,279 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 20:08:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 4554 transitions. [2021-06-12 20:08:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:38,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:38,281 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:38,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5682 [2021-06-12 20:08:38,481 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1165657139, now seen corresponding path program 623 times [2021-06-12 20:08:38,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:38,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929262362] [2021-06-12 20:08:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:38,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929262362] [2021-06-12 20:08:38,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929262362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857988255] [2021-06-12 20:08:38,558 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 20:08:38,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:38,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:38,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,687 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 16 treesize of output 12 [2021-06-12 20:08:38,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:38,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,694 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 15 treesize of output 11 [2021-06-12 20:08:38,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:38,697 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 17 treesize of output 13 [2021-06-12 20:08:38,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:38,787 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:38,792 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 20:08:38,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:38,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857988255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:38,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:38,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:38,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335540402] [2021-06-12 20:08:38,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:38,990 INFO L87 Difference]: Start difference. First operand 1377 states and 4554 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 20:08:39,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:39,208 INFO L93 Difference]: Finished difference Result 1767 states and 5613 transitions. [2021-06-12 20:08:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:39,209 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 25 [2021-06-12 20:08:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:39,211 INFO L225 Difference]: With dead ends: 1767 [2021-06-12 20:08:39,211 INFO L226 Difference]: Without dead ends: 1739 [2021-06-12 20:08:39,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-06-12 20:08:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1370. [2021-06-12 20:08:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.3060628195763333) internal successors, (4526), 1369 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4526 transitions. [2021-06-12 20:08:39,226 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4526 transitions. Word has length 25 [2021-06-12 20:08:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:39,226 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 4526 transitions. [2021-06-12 20:08:39,226 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 20:08:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4526 transitions. [2021-06-12 20:08:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:39,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:39,227 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:39,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5695 [2021-06-12 20:08:39,428 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 991420397, now seen corresponding path program 624 times [2021-06-12 20:08:39,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:39,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503277298] [2021-06-12 20:08:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:39,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503277298] [2021-06-12 20:08:39,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503277298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:39,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516470072] [2021-06-12 20:08:39,513 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 20:08:39,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:39,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:39,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,672 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 16 treesize of output 12 [2021-06-12 20:08:39,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,676 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 15 treesize of output 11 [2021-06-12 20:08:39,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,680 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 17 treesize of output 13 [2021-06-12 20:08:39,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,684 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 16 treesize of output 12 [2021-06-12 20:08:39,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,781 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:08:39,789 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 20:08:39,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:110 [2021-06-12 20:08:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,916 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 17 treesize of output 13 [2021-06-12 20:08:39,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:39,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:39,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:39,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,012 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-12 20:08:40,012 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:40,015 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 7 treesize of output 5 [2021-06-12 20:08:40,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:40,050 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 8 treesize of output 6 [2021-06-12 20:08:40,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:40,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:40,080 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2223 vanished before elimination [2021-06-12 20:08:40,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2226 vanished before elimination [2021-06-12 20:08:40,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:40,082 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:29 [2021-06-12 20:08:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:40,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516470072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:40,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:40,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604217962] [2021-06-12 20:08:40,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:40,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:40,150 INFO L87 Difference]: Start difference. First operand 1370 states and 4526 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 20:08:40,389 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-12 20:08:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:40,625 INFO L93 Difference]: Finished difference Result 1582 states and 5106 transitions. [2021-06-12 20:08:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:40,626 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 25 [2021-06-12 20:08:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:40,628 INFO L225 Difference]: With dead ends: 1582 [2021-06-12 20:08:40,628 INFO L226 Difference]: Without dead ends: 1558 [2021-06-12 20:08:40,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:08:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-06-12 20:08:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1360. [2021-06-12 20:08:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.30242825607064) internal successors, (4488), 1359 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4488 transitions. [2021-06-12 20:08:40,642 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4488 transitions. Word has length 25 [2021-06-12 20:08:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:40,642 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4488 transitions. [2021-06-12 20:08:40,642 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 20:08:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4488 transitions. [2021-06-12 20:08:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:40,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:40,644 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:40,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5715,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:40,844 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash 111146861, now seen corresponding path program 625 times [2021-06-12 20:08:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:40,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119662543] [2021-06-12 20:08:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:40,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:40,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119662543] [2021-06-12 20:08:40,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119662543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:40,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886279150] [2021-06-12 20:08:40,932 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 20:08:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:41,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,050 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 17 treesize of output 13 [2021-06-12 20:08:41,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,054 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 18 treesize of output 14 [2021-06-12 20:08:41,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,058 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 18 treesize of output 14 [2021-06-12 20:08:41,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:41,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:41,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-12 20:08:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,253 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 18 treesize of output 14 [2021-06-12 20:08:41,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:41,258 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 20:08:41,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,384 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-12 20:08:41,384 INFO L628 ElimStorePlain]: treesize reduction 181, result has 38.9 percent of original size [2021-06-12 20:08:41,384 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:41,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:08:41,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,429 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2236 vanished before elimination [2021-06-12 20:08:41,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:41,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2234 vanished before elimination [2021-06-12 20:08:41,473 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 7 treesize of output 5 [2021-06-12 20:08:41,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:41,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:41,510 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2238 vanished before elimination [2021-06-12 20:08:41,512 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 20:08:41,512 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 16 variables, input treesize:321, output treesize:47 [2021-06-12 20:08:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:41,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886279150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:41,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:41,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883878234] [2021-06-12 20:08:41,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:41,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:41,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:41,610 INFO L87 Difference]: Start difference. First operand 1360 states and 4488 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 20:08:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:41,843 INFO L93 Difference]: Finished difference Result 1629 states and 5259 transitions. [2021-06-12 20:08:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:41,843 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 25 [2021-06-12 20:08:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:41,845 INFO L225 Difference]: With dead ends: 1629 [2021-06-12 20:08:41,845 INFO L226 Difference]: Without dead ends: 1629 [2021-06-12 20:08:41,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-06-12 20:08:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1341. [2021-06-12 20:08:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3) internal successors, (4422), 1340 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4422 transitions. [2021-06-12 20:08:41,860 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4422 transitions. Word has length 25 [2021-06-12 20:08:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:41,860 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4422 transitions. [2021-06-12 20:08:41,860 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 20:08:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4422 transitions. [2021-06-12 20:08:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:41,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:41,861 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:42,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5733,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:42,062 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash 820370875, now seen corresponding path program 626 times [2021-06-12 20:08:42,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:42,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318461135] [2021-06-12 20:08:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:42,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:42,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318461135] [2021-06-12 20:08:42,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318461135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:42,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578379066] [2021-06-12 20:08:42,136 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 20:08:42,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:42,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:42,211 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 16 treesize of output 12 [2021-06-12 20:08:42,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:08:42,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,216 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 15 treesize of output 11 [2021-06-12 20:08:42,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,218 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 17 treesize of output 13 [2021-06-12 20:08:42,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,250 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-06-12 20:08:42,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:42,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-06-12 20:08:42,287 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 18 treesize of output 14 [2021-06-12 20:08:42,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,290 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 18 treesize of output 14 [2021-06-12 20:08:42,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,358 INFO L628 ElimStorePlain]: treesize reduction 117, result has 39.4 percent of original size [2021-06-12 20:08:42,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:42,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:42,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:08:42,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:42,411 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:42,412 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 9 treesize of output 7 [2021-06-12 20:08:42,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:42,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:42,437 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 11 treesize of output 7 [2021-06-12 20:08:42,439 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 20:08:42,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:42,459 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2244 vanished before elimination [2021-06-12 20:08:42,459 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2239 vanished before elimination [2021-06-12 20:08:42,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:08:42,460 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:207, output treesize:45 [2021-06-12 20:08:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:42,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578379066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:42,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:42,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:42,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027481010] [2021-06-12 20:08:42,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:42,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:42,513 INFO L87 Difference]: Start difference. First operand 1341 states and 4422 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 20:08:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:42,820 INFO L93 Difference]: Finished difference Result 1681 states and 5299 transitions. [2021-06-12 20:08:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:42,820 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 25 [2021-06-12 20:08:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:42,822 INFO L225 Difference]: With dead ends: 1681 [2021-06-12 20:08:42,822 INFO L226 Difference]: Without dead ends: 1639 [2021-06-12 20:08:42,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-12 20:08:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1351. [2021-06-12 20:08:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.2896296296296295) internal successors, (4441), 1350 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4441 transitions. [2021-06-12 20:08:42,836 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4441 transitions. Word has length 25 [2021-06-12 20:08:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:42,836 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4441 transitions. [2021-06-12 20:08:42,837 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 20:08:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4441 transitions. [2021-06-12 20:08:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:42,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:42,838 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:43,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5746,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:43,038 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 679942715, now seen corresponding path program 627 times [2021-06-12 20:08:43,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:43,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373741388] [2021-06-12 20:08:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:43,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373741388] [2021-06-12 20:08:43,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373741388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123201218] [2021-06-12 20:08:43,108 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 20:08:43,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:08:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,231 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 16 treesize of output 12 [2021-06-12 20:08:43,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,235 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 15 treesize of output 11 [2021-06-12 20:08:43,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:43,238 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 16 treesize of output 12 [2021-06-12 20:08:43,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,241 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 17 treesize of output 13 [2021-06-12 20:08:43,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:43,326 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:43,331 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 20:08:43,331 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-12 20:08:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123201218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114757928] [2021-06-12 20:08:43,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:43,523 INFO L87 Difference]: Start difference. First operand 1351 states and 4441 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 20:08:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:43,847 INFO L93 Difference]: Finished difference Result 1616 states and 5154 transitions. [2021-06-12 20:08:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:08:43,847 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 25 [2021-06-12 20:08:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:43,849 INFO L225 Difference]: With dead ends: 1616 [2021-06-12 20:08:43,849 INFO L226 Difference]: Without dead ends: 1580 [2021-06-12 20:08:43,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-06-12 20:08:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1338. [2021-06-12 20:08:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.2969334330590874) internal successors, (4408), 1337 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4408 transitions. [2021-06-12 20:08:43,863 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4408 transitions. Word has length 25 [2021-06-12 20:08:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:43,863 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4408 transitions. [2021-06-12 20:08:43,863 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 20:08:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4408 transitions. [2021-06-12 20:08:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:43,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:43,865 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:44,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5753,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:44,065 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1094661185, now seen corresponding path program 628 times [2021-06-12 20:08:44,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:44,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822891629] [2021-06-12 20:08:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:44,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:44,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822891629] [2021-06-12 20:08:44,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822891629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:44,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901162747] [2021-06-12 20:08:44,163 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 20:08:44,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:44,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:44,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:44,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:44,287 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 20:08:44,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:44,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:44,290 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 17 treesize of output 13 [2021-06-12 20:08:44,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:44,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:44,319 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 20:08:44,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-06-12 20:08:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:44,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901162747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:44,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:44,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:44,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708693917] [2021-06-12 20:08:44,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:44,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:44,430 INFO L87 Difference]: Start difference. First operand 1338 states and 4408 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 20:08:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:44,710 INFO L93 Difference]: Finished difference Result 1449 states and 4737 transitions. [2021-06-12 20:08:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:44,710 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 25 [2021-06-12 20:08:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:44,712 INFO L225 Difference]: With dead ends: 1449 [2021-06-12 20:08:44,712 INFO L226 Difference]: Without dead ends: 1421 [2021-06-12 20:08:44,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-12 20:08:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1322. [2021-06-12 20:08:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 3.3103709311127933) internal successors, (4373), 1321 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 4373 transitions. [2021-06-12 20:08:44,724 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 4373 transitions. Word has length 25 [2021-06-12 20:08:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:44,724 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 4373 transitions. [2021-06-12 20:08:44,724 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 20:08:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 4373 transitions. [2021-06-12 20:08:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:44,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:44,726 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:44,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-12 20:08:44,926 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash -629403973, now seen corresponding path program 629 times [2021-06-12 20:08:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:44,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77980422] [2021-06-12 20:08:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:45,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77980422] [2021-06-12 20:08:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77980422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887831028] [2021-06-12 20:08:45,001 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 20:08:45,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:45,158 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 16 treesize of output 12 [2021-06-12 20:08:45,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:45,161 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 15 treesize of output 11 [2021-06-12 20:08:45,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:45,185 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 20:08:45,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:55 [2021-06-12 20:08:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:45,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887831028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:45,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:45,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081140144] [2021-06-12 20:08:45,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:45,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:45,286 INFO L87 Difference]: Start difference. First operand 1322 states and 4373 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:45,485 INFO L93 Difference]: Finished difference Result 1482 states and 4862 transitions. [2021-06-12 20:08:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:45,487 INFO L225 Difference]: With dead ends: 1482 [2021-06-12 20:08:45,487 INFO L226 Difference]: Without dead ends: 1482 [2021-06-12 20:08:45,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-12 20:08:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1322. [2021-06-12 20:08:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 3.307342922028766) internal successors, (4369), 1321 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 4369 transitions. [2021-06-12 20:08:45,500 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 4369 transitions. Word has length 25 [2021-06-12 20:08:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:45,500 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 4369 transitions. [2021-06-12 20:08:45,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 4369 transitions. [2021-06-12 20:08:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:45,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:45,502 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:45,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5779,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:45,702 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2044778285, now seen corresponding path program 630 times [2021-06-12 20:08:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:45,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220076791] [2021-06-12 20:08:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:45,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:45,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220076791] [2021-06-12 20:08:45,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220076791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015876323] [2021-06-12 20:08:45,778 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 20:08:45,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:45,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:45,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:45,861 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 23 treesize of output 17 [2021-06-12 20:08:45,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:08:45,863 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 22 treesize of output 16 [2021-06-12 20:08:45,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:45,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:45,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:08:45,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-12 20:08:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:45,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015876323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:45,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:45,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:08:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61156289] [2021-06-12 20:08:45,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:08:45,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:08:45,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:45,939 INFO L87 Difference]: Start difference. First operand 1322 states and 4369 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:46,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:46,111 INFO L93 Difference]: Finished difference Result 1535 states and 4986 transitions. [2021-06-12 20:08:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 25 [2021-06-12 20:08:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:46,113 INFO L225 Difference]: With dead ends: 1535 [2021-06-12 20:08:46,113 INFO L226 Difference]: Without dead ends: 1535 [2021-06-12 20:08:46,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:08:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-12 20:08:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1324. [2021-06-12 20:08:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.306122448979592) internal successors, (4374), 1323 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4374 transitions. [2021-06-12 20:08:46,127 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4374 transitions. Word has length 25 [2021-06-12 20:08:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:46,127 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4374 transitions. [2021-06-12 20:08:46,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20:08:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4374 transitions. [2021-06-12 20:08:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:46,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:46,128 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:46,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5786,631 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:46,329 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash 890072271, now seen corresponding path program 631 times [2021-06-12 20:08:46,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:46,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059742937] [2021-06-12 20:08:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:46,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059742937] [2021-06-12 20:08:46,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059742937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705153003] [2021-06-12 20:08:46,419 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 20:08:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:46,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:46,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:46,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:46,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:08:46,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:46,556 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 20:08:46,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:46,588 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 20:08:46,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-12 20:08:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:46,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:46,704 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 17 treesize of output 13 [2021-06-12 20:08:46,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:46,707 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 18 treesize of output 14 [2021-06-12 20:08:46,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,769 INFO L628 ElimStorePlain]: treesize reduction 96, result has 39.6 percent of original size [2021-06-12 20:08:46,769 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:46,771 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 20:08:46,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:46,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:46,792 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2259 vanished before elimination [2021-06-12 20:08:46,793 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 20:08:46,793 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:173, output treesize:22 [2021-06-12 20:08:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705153003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:46,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:46,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676896979] [2021-06-12 20:08:46,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:46,833 INFO L87 Difference]: Start difference. First operand 1324 states and 4374 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 20:08:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:47,019 INFO L93 Difference]: Finished difference Result 1464 states and 4795 transitions. [2021-06-12 20:08:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:47,019 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 25 [2021-06-12 20:08:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:47,021 INFO L225 Difference]: With dead ends: 1464 [2021-06-12 20:08:47,021 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 20:08:47,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 20:08:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1321. [2021-06-12 20:08:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.3037878787878787) internal successors, (4361), 1320 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4361 transitions. [2021-06-12 20:08:47,034 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4361 transitions. Word has length 25 [2021-06-12 20:08:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:47,034 INFO L482 AbstractCegarLoop]: Abstraction has 1321 states and 4361 transitions. [2021-06-12 20:08:47,034 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 20:08:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4361 transitions. [2021-06-12 20:08:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:47,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:47,036 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:47,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5796,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:47,236 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:47,236 INFO L82 PathProgramCache]: Analyzing trace with hash 890416843, now seen corresponding path program 632 times [2021-06-12 20:08:47,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:47,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519428994] [2021-06-12 20:08:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:47,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519428994] [2021-06-12 20:08:47,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519428994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409378762] [2021-06-12 20:08:47,314 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 20:08:47,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:47,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:47,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:47,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:47,458 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 15 treesize of output 11 [2021-06-12 20:08:47,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:47,460 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 16 treesize of output 12 [2021-06-12 20:08:47,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:47,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:47,484 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 20:08:47,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:55 [2021-06-12 20:08:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:08:47,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409378762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:47,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:47,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373662167] [2021-06-12 20:08:47,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:47,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:47,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:47,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:47,621 INFO L87 Difference]: Start difference. First operand 1321 states and 4361 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 20:08:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:47,856 INFO L93 Difference]: Finished difference Result 1469 states and 4802 transitions. [2021-06-12 20:08:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:47,857 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 25 [2021-06-12 20:08:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:47,858 INFO L225 Difference]: With dead ends: 1469 [2021-06-12 20:08:47,859 INFO L226 Difference]: Without dead ends: 1460 [2021-06-12 20:08:47,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-06-12 20:08:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1309. [2021-06-12 20:08:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3035168195718656) internal successors, (4321), 1308 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4321 transitions. [2021-06-12 20:08:47,871 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4321 transitions. Word has length 25 [2021-06-12 20:08:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:47,872 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4321 transitions. [2021-06-12 20:08:47,872 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 20:08:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4321 transitions. [2021-06-12 20:08:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:47,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:47,873 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:48,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5803 [2021-06-12 20:08:48,073 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:48,074 INFO L82 PathProgramCache]: Analyzing trace with hash -58520261, now seen corresponding path program 633 times [2021-06-12 20:08:48,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:48,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258564249] [2021-06-12 20:08:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:48,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:48,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258564249] [2021-06-12 20:08:48,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258564249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:48,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407709958] [2021-06-12 20:08:48,150 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 20:08:48,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:48,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:48,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:48,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:48,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:48,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:48,304 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 15 treesize of output 11 [2021-06-12 20:08:48,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:48,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:48,326 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 20:08:48,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:08:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407709958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:48,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:48,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594097349] [2021-06-12 20:08:48,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:48,401 INFO L87 Difference]: Start difference. First operand 1309 states and 4321 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 20:08:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:48,745 INFO L93 Difference]: Finished difference Result 1553 states and 5034 transitions. [2021-06-12 20:08:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:48,745 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 25 [2021-06-12 20:08:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:48,747 INFO L225 Difference]: With dead ends: 1553 [2021-06-12 20:08:48,747 INFO L226 Difference]: Without dead ends: 1553 [2021-06-12 20:08:48,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:08:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-12 20:08:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1323. [2021-06-12 20:08:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.3161875945537065) internal successors, (4384), 1322 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4384 transitions. [2021-06-12 20:08:48,761 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4384 transitions. Word has length 25 [2021-06-12 20:08:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:48,761 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4384 transitions. [2021-06-12 20:08:48,761 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 20:08:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4384 transitions. [2021-06-12 20:08:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:48,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:48,762 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:48,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5819 [2021-06-12 20:08:48,963 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1153219179, now seen corresponding path program 634 times [2021-06-12 20:08:48,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:48,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039299193] [2021-06-12 20:08:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:49,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039299193] [2021-06-12 20:08:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039299193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610367981] [2021-06-12 20:08:49,037 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 20:08:49,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,187 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 16 treesize of output 12 [2021-06-12 20:08:49,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,190 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 15 treesize of output 11 [2021-06-12 20:08:49,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:49,206 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 20:08:49,206 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-06-12 20:08:49,251 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:08:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,254 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 20:08:49,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,258 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 17 treesize of output 13 [2021-06-12 20:08:49,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,262 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 18 treesize of output 14 [2021-06-12 20:08:49,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:49,265 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 18 treesize of output 14 [2021-06-12 20:08:49,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:49,314 INFO L628 ElimStorePlain]: treesize reduction 89, result has 33.1 percent of original size [2021-06-12 20:08:49,314 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:49,315 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 20:08:49,315 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:153, output treesize:22 [2021-06-12 20:08:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610367981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:49,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:49,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577399549] [2021-06-12 20:08:49,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:49,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:49,345 INFO L87 Difference]: Start difference. First operand 1323 states and 4384 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 20:08:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:49,683 INFO L93 Difference]: Finished difference Result 1595 states and 5150 transitions. [2021-06-12 20:08:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:08:49,683 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 25 [2021-06-12 20:08:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:49,685 INFO L225 Difference]: With dead ends: 1595 [2021-06-12 20:08:49,685 INFO L226 Difference]: Without dead ends: 1581 [2021-06-12 20:08:49,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:08:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-06-12 20:08:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1351. [2021-06-12 20:08:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.314814814814815) internal successors, (4475), 1350 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4475 transitions. [2021-06-12 20:08:49,699 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4475 transitions. Word has length 25 [2021-06-12 20:08:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:49,699 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4475 transitions. [2021-06-12 20:08:49,699 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 20:08:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4475 transitions. [2021-06-12 20:08:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:49,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:49,700 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:49,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5830,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:49,901 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1418637001, now seen corresponding path program 635 times [2021-06-12 20:08:49,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:49,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040608488] [2021-06-12 20:08:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:49,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:49,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040608488] [2021-06-12 20:08:49,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040608488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:49,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777261263] [2021-06-12 20:08:49,976 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 20:08:50,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:08:50,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:50,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:50,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,123 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 16 treesize of output 12 [2021-06-12 20:08:50,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:50,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:50,141 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 20:08:50,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-06-12 20:08:50,215 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-12 20:08:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,218 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 17 treesize of output 13 [2021-06-12 20:08:50,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,222 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 16 treesize of output 12 [2021-06-12 20:08:50,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,225 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 16 treesize of output 12 [2021-06-12 20:08:50,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,228 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 15 treesize of output 11 [2021-06-12 20:08:50,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,266 INFO L628 ElimStorePlain]: treesize reduction 59, result has 38.5 percent of original size [2021-06-12 20:08:50,266 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-12 20:08:50,267 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 20:08:50,267 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:133, output treesize:15 [2021-06-12 20:08:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:50,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777261263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:50,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:50,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762442633] [2021-06-12 20:08:50,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:50,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:50,291 INFO L87 Difference]: Start difference. First operand 1351 states and 4475 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 20:08:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:50,532 INFO L93 Difference]: Finished difference Result 1622 states and 5243 transitions. [2021-06-12 20:08:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:08:50,532 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 25 [2021-06-12 20:08:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:50,534 INFO L225 Difference]: With dead ends: 1622 [2021-06-12 20:08:50,534 INFO L226 Difference]: Without dead ends: 1622 [2021-06-12 20:08:50,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-12 20:08:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1351. [2021-06-12 20:08:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.314814814814815) internal successors, (4475), 1350 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4475 transitions. [2021-06-12 20:08:50,549 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4475 transitions. Word has length 25 [2021-06-12 20:08:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:50,549 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4475 transitions. [2021-06-12 20:08:50,549 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 20:08:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4475 transitions. [2021-06-12 20:08:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:50,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:50,551 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:50,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5837 [2021-06-12 20:08:50,752 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1418292429, now seen corresponding path program 636 times [2021-06-12 20:08:50,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:50,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137273304] [2021-06-12 20:08:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:50,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:50,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137273304] [2021-06-12 20:08:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137273304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:50,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928797765] [2021-06-12 20:08:50,829 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 20:08:50,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:08:50,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:50,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,987 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 15 treesize of output 11 [2021-06-12 20:08:50,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:50,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:50,990 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 16 treesize of output 12 [2021-06-12 20:08:50,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:51,012 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 20:08:51,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:08:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928797765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:51,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:51,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457443563] [2021-06-12 20:08:51,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:51,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:51,108 INFO L87 Difference]: Start difference. First operand 1351 states and 4475 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 20:08:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:51,464 INFO L93 Difference]: Finished difference Result 1564 states and 5058 transitions. [2021-06-12 20:08:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:08:51,464 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 25 [2021-06-12 20:08:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:51,466 INFO L225 Difference]: With dead ends: 1564 [2021-06-12 20:08:51,466 INFO L226 Difference]: Without dead ends: 1549 [2021-06-12 20:08:51,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-06-12 20:08:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1344. [2021-06-12 20:08:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3112434847356664) internal successors, (4447), 1343 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4447 transitions. [2021-06-12 20:08:51,479 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4447 transitions. Word has length 25 [2021-06-12 20:08:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:51,480 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4447 transitions. [2021-06-12 20:08:51,480 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 20:08:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4447 transitions. [2021-06-12 20:08:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:51,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:51,481 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:51,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5849,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:51,681 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash 727533759, now seen corresponding path program 637 times [2021-06-12 20:08:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:51,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748084266] [2021-06-12 20:08:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:51,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748084266] [2021-06-12 20:08:51,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748084266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827684016] [2021-06-12 20:08:51,754 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 20:08:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:08:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:51,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:51,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:51,905 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 15 treesize of output 11 [2021-06-12 20:08:51,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:51,908 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 16 treesize of output 12 [2021-06-12 20:08:51,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:51,927 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 20:08:51,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:49 [2021-06-12 20:08:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:51,979 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 17 treesize of output 13 [2021-06-12 20:08:51,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:51,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:51,981 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 17 treesize of output 13 [2021-06-12 20:08:51,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,005 INFO L628 ElimStorePlain]: treesize reduction 44, result has 36.2 percent of original size [2021-06-12 20:08:52,005 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-12 20:08:52,006 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 20:08:52,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:9 [2021-06-12 20:08:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:52,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827684016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:52,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:52,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:52,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38316944] [2021-06-12 20:08:52,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:52,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:52,024 INFO L87 Difference]: Start difference. First operand 1344 states and 4447 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 20:08:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:52,258 INFO L93 Difference]: Finished difference Result 1509 states and 4929 transitions. [2021-06-12 20:08:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:52,258 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 25 [2021-06-12 20:08:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:52,260 INFO L225 Difference]: With dead ends: 1509 [2021-06-12 20:08:52,261 INFO L226 Difference]: Without dead ends: 1509 [2021-06-12 20:08:52,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:08:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-12 20:08:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1316. [2021-06-12 20:08:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.3072243346007606) internal successors, (4349), 1315 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4349 transitions. [2021-06-12 20:08:52,274 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4349 transitions. Word has length 25 [2021-06-12 20:08:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:52,274 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 4349 transitions. [2021-06-12 20:08:52,274 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 20:08:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4349 transitions. [2021-06-12 20:08:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:52,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:52,276 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:52,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5861 [2021-06-12 20:08:52,476 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1956148007, now seen corresponding path program 638 times [2021-06-12 20:08:52,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:52,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114096523] [2021-06-12 20:08:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:52,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:52,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114096523] [2021-06-12 20:08:52,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114096523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:52,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367248213] [2021-06-12 20:08:52,546 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 20:08:52,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:08:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:52,697 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 16 treesize of output 12 [2021-06-12 20:08:52,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:52,699 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 15 treesize of output 11 [2021-06-12 20:08:52,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:52,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:52,721 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 20:08:52,721 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-12 20:08:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:52,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367248213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:52,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:52,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:52,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056424029] [2021-06-12 20:08:52,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:52,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:52,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:52,787 INFO L87 Difference]: Start difference. First operand 1316 states and 4349 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 20:08:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:53,110 INFO L93 Difference]: Finished difference Result 1439 states and 4700 transitions. [2021-06-12 20:08:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:08:53,110 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 25 [2021-06-12 20:08:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:53,112 INFO L225 Difference]: With dead ends: 1439 [2021-06-12 20:08:53,112 INFO L226 Difference]: Without dead ends: 1409 [2021-06-12 20:08:53,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:08:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-06-12 20:08:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1302. [2021-06-12 20:08:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.3051498847040737) internal successors, (4300), 1301 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4300 transitions. [2021-06-12 20:08:53,124 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4300 transitions. Word has length 25 [2021-06-12 20:08:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:53,124 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4300 transitions. [2021-06-12 20:08:53,125 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 20:08:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4300 transitions. [2021-06-12 20:08:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:53,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:53,126 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:53,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:53,326 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:53,326 INFO L82 PathProgramCache]: Analyzing trace with hash -239122703, now seen corresponding path program 639 times [2021-06-12 20:08:53,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:53,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095000293] [2021-06-12 20:08:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:53,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095000293] [2021-06-12 20:08:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095000293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056089084] [2021-06-12 20:08:53,412 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 20:08:53,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:08:53,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:53,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:53,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:53,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:53,551 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 20:08:53,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:53,555 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 16 treesize of output 12 [2021-06-12 20:08:53,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,644 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 20:08:53,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:53,647 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 15 treesize of output 11 [2021-06-12 20:08:53,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:53,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:53,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:53,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:53,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:53,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:98 [2021-06-12 20:08:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:53,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056089084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:53,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:53,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:08:53,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599530725] [2021-06-12 20:08:53,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:08:53,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:08:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:08:53,866 INFO L87 Difference]: Start difference. First operand 1302 states and 4300 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:54,500 INFO L93 Difference]: Finished difference Result 1741 states and 5522 transitions. [2021-06-12 20:08:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:08:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:08:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:54,503 INFO L225 Difference]: With dead ends: 1741 [2021-06-12 20:08:54,503 INFO L226 Difference]: Without dead ends: 1741 [2021-06-12 20:08:54,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:08:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-06-12 20:08:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1316. [2021-06-12 20:08:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.3224334600760455) internal successors, (4369), 1315 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4369 transitions. [2021-06-12 20:08:54,518 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4369 transitions. Word has length 25 [2021-06-12 20:08:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:54,518 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 4369 transitions. [2021-06-12 20:08:54,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4369 transitions. [2021-06-12 20:08:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:54,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:54,519 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:54,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5873,640 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:08:54,720 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1725597125, now seen corresponding path program 640 times [2021-06-12 20:08:54,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:54,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666818269] [2021-06-12 20:08:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:08:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:54,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:08:54,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666818269] [2021-06-12 20:08:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666818269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390814394] [2021-06-12 20:08:54,795 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 20:08:54,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:08:54,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:08:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:08:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:08:54,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20:08:54,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:54,931 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 16 treesize of output 12 [2021-06-12 20:08:54,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:08:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:54,990 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 20:08:54,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:54,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:08:54,993 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 16 treesize of output 12 [2021-06-12 20:08:54,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:08:55,075 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-12 20:08:55,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:08:55,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:98 [2021-06-12 20:08:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:08:55,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390814394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:08:55,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:08:55,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:08:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399681997] [2021-06-12 20:08:55,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:08:55,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:08:55,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:08:55,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:08:55,239 INFO L87 Difference]: Start difference. First operand 1316 states and 4369 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:08:55,726 INFO L93 Difference]: Finished difference Result 1606 states and 5147 transitions. [2021-06-12 20:08:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:08:55,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 25 [2021-06-12 20:08:55,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:08:55,728 INFO L225 Difference]: With dead ends: 1606 [2021-06-12 20:08:55,728 INFO L226 Difference]: Without dead ends: 1582 [2021-06-12 20:08:55,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:08:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-12 20:08:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1314. [2021-06-12 20:08:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.3175932977913174) internal successors, (4356), 1313 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:08:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4356 transitions. [2021-06-12 20:08:55,743 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4356 transitions. Word has length 25 [2021-06-12 20:08:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:08:55,744 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4356 transitions. [2021-06-12 20:08:55,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 20:08:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4356 transitions. [2021-06-12 20:08:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:08:55,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:08:55,751 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:08:55,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5888 [2021-06-12 20:08:55,951 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:08:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:08:55,951 INFO L82 PathProgramCache]: Analyzing trace with hash -503720617, now seen corresponding path program 641 times [2021-06-12 20:08:55,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:08:55,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600118556] [2021-06-12 20:08:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:08:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-12 20:08:56,012 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-12 20:08:56,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902 [2021-06-12 20:08:56,013 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:08:56,014 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:08:56,015 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:08:56,016 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:08:56 BasicIcfg [2021-06-12 20:08:56,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:08:56,016 INFO L168 Benchmark]: Toolchain (without parser) took 842732.61 ms. Allocated memory was 187.7 MB in the beginning and 392.2 MB in the end (delta: 204.5 MB). Free memory was 167.6 MB in the beginning and 336.6 MB in the end (delta: -169.0 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:08:56,016 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory was 168.9 MB in the beginning and 168.8 MB in the end (delta: 97.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:08:56,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.53 ms. Allocated memory is still 187.7 MB. Free memory was 167.5 MB in the beginning and 166.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:08:56,016 INFO L168 Benchmark]: Boogie Preprocessor took 17.32 ms. Allocated memory is still 187.7 MB. Free memory was 166.0 MB in the beginning and 165.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:08:56,016 INFO L168 Benchmark]: RCFGBuilder took 317.32 ms. Allocated memory is still 187.7 MB. Free memory was 165.0 MB in the beginning and 141.7 MB in the end (delta: 23.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:08:56,016 INFO L168 Benchmark]: TraceAbstraction took 842375.07 ms. Allocated memory was 187.7 MB in the beginning and 392.2 MB in the end (delta: 204.5 MB). Free memory was 141.2 MB in the beginning and 336.6 MB in the end (delta: -195.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:08:56,017 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 0.09 ms. Allocated memory is still 187.7 MB. Free memory was 168.9 MB in the beginning and 168.8 MB in the end (delta: 97.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.53 ms. Allocated memory is still 187.7 MB. Free memory was 167.5 MB in the beginning and 166.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.32 ms. Allocated memory is still 187.7 MB. Free memory was 166.0 MB in the beginning and 165.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 317.32 ms. Allocated memory is still 187.7 MB. Free memory was 165.0 MB in the beginning and 141.7 MB in the end (delta: 23.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 842375.07 ms. Allocated memory was 187.7 MB in the beginning and 392.2 MB in the end (delta: 204.5 MB). Free memory was 141.2 MB in the beginning and 336.6 MB in the end (delta: -195.5 MB). Peak memory consumption was 9.8 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 26 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - 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: 842287.2ms, OverallIterations: 657, TraceHistogramMax: 5, EmptinessCheckTime: 768.5ms, AutomataDifference: 318181.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38546 SDtfs, 56311 SDslu, 253079 SDs, 0 SdLazy, 278893 SolverSat, 13669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 125938.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25576 GetRequests, 11199 SyntacticMatches, 1328 SemanticMatches, 13049 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49874 ImplicationChecksByTransitivity, 339812.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1418occurred in iteration=596, InterpolantAutomatonStates: 9265, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7798.3ms AutomataMinimizationTime, 656 MinimizatonAttempts, 175015 StatesRemovedByMinimization, 653 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2829.4ms SsaConstructionTime, 7882.6ms SatisfiabilityAnalysisTime, 363586.3ms InterpolantComputationTime, 31374 NumberOfCodeBlocks, 31270 NumberOfCodeBlocksAsserted, 2282 NumberOfCheckSat, 30078 ConstructedInterpolants, 2839 QuantifiedInterpolants, 582533 SizeOfPredicates, 5833 NumberOfNonLiveVariables, 70292 ConjunctsInSsa, 14657 ConjunctsInUnsatCore, 1296 InterpolantComputations, 16 PerfectInterpolantSequences, 10691/22462 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