/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/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:37:08,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:37:08,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:37:08,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:37:08,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:37:08,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:37:08,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:37:08,914 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 [2021-07-13 20:37:08,939 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:37:08,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:37:08,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:37:08,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:37:08,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:37:08,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:37:08,942 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:37:08,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:37:08,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:37:08,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:37:08,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:37:08,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:37:08,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:37:08,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:37:08,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:37:08,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:37:08,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:37:08,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:37:08,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:37:08,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:37:08,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:37:08,955 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:37:08,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:37:08,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:37:09,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:37:09,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:37:09,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:37:09,216 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:37:09,216 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:37:09,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2021-07-13 20:37:09,217 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2021-07-13 20:37:09,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:37:09,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:37:09,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:37:09,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:37:09,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:37:09,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:37:09,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:37:09,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:37:09,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:37:09,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/1) ... [2021-07-13 20:37:09,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:37:09,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:37:09,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:37:09,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:37:09,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (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 [2021-07-13 20:37:09,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:37:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:37:09,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:37:09,337 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:37:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:37:09,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:37:09,337 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:37:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:37:09,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:37:09,337 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:37:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:37:09,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:37:09,338 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:37:09,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:37:09,499 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:37:09,501 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:37:09 BoogieIcfgContainer [2021-07-13 20:37:09,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:37:09,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:37:09,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:37:09,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:37:09,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:37:09" (1/2) ... [2021-07-13 20:37:09,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca4d2b and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:37:09, skipping insertion in model container [2021-07-13 20:37:09,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:37:09" (2/2) ... [2021-07-13 20:37:09,505 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2021-07-13 20:37:09,509 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:37:09,509 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:37:09,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:37:09,509 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:37:09,563 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:37:09,579 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:37:09,591 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:37:09,591 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:37:09,592 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:37:09,592 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:37:09,592 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:37:09,592 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:37:09,592 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:37:09,593 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:37:09,599 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:37:09,613 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:37:09,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:09,622 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:09,622 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-13 20:37:09,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:09,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863226067] [2021-07-13 20:37:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863226067] [2021-07-13 20:37:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863226067] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:37:09,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:37:09,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:37:09,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122910566] [2021-07-13 20:37:09,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:37:09,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:37:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:37:09,765 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-07-13 20:37:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:09,790 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:37:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:37:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-07-13 20:37:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:09,800 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:37:09,800 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:37:09,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:37:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:37:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:37:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:37:09,834 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:37:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:09,835 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:37:09,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-07-13 20:37:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:37:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:37:09,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:09,836 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:09,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:37:09,837 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:09,837 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-13 20:37:09,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:09,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080811] [2021-07-13 20:37:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:09,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:09,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080811] [2021-07-13 20:37:09,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080811] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:37:09,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:37:09,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:37:09,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110556622] [2021-07-13 20:37:09,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:37:09,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:09,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:37:09,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:37:09,874 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:09,904 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:37:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:37:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:37:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:09,906 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:37:09,906 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:37:09,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:37:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:37:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:37:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:37:09,918 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:37:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:09,918 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:37:09,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:37:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:37:09,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:09,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:09,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:37:09,920 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-13 20:37:09,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:09,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009495358] [2021-07-13 20:37:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:09,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:09,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009495358] [2021-07-13 20:37:09,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009495358] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:37:09,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:37:09,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:37:09,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758634507] [2021-07-13 20:37:09,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:37:09,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:37:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:37:09,980 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:10,022 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:37:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:37:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:37:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:10,024 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:37:10,024 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:37:10,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:37:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:37:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:37:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:37:10,036 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:37:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:10,036 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:37:10,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:37:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:37:10,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:10,037 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:10,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:37:10,037 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-13 20:37:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:10,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531263828] [2021-07-13 20:37:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:10,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:10,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531263828] [2021-07-13 20:37:10,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531263828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:10,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190921564] [2021-07-13 20:37:10,376 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 [2021-07-13 20:37:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:37:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:10,861 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 21 treesize of output 10 [2021-07-13 20:37:10,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:10,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:10,870 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 16 treesize of output 10 [2021-07-13 20:37:10,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:10,874 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 16 treesize of output 10 [2021-07-13 20:37:10,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:10,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:10,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:97, output treesize:21 [2021-07-13 20:37:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:10,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190921564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:10,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:10,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:10,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843109525] [2021-07-13 20:37:10,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:10,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:10,925 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:37:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:11,144 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:37:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:37:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-07-13 20:37:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:11,150 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:37:11,150 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:37:11,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:37:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:37:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:37:11,173 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:37:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:11,173 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:37:11,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:37:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:37:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:37:11,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:11,175 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:11,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:11,387 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-13 20:37:11,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:11,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049973127] [2021-07-13 20:37:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:11,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:11,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049973127] [2021-07-13 20:37:11,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049973127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:11,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148237206] [2021-07-13 20:37:11,624 INFO L93 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 [2021-07-13 20:37:11,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:11,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:37:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:11,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:11,857 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:37:11,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:11,875 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:11,875 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:37:11,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:11,886 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:11,886 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:37:11,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:11,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:11,896 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:11,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:11,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:11,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:37:11,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-07-13 20:37:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:12,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148237206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:12,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:12,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:37:12,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141903276] [2021-07-13 20:37:12,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:12,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:12,107 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:12,563 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:37:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:37:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:37:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:12,565 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:37:12,566 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:37:12,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 618.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:37:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:37:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:37:12,573 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:37:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:12,574 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:37:12,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:37:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:37:12,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:12,575 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:12,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:37:12,794 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-13 20:37:12,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:12,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134027723] [2021-07-13 20:37:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:12,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:12,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134027723] [2021-07-13 20:37:12,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134027723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510288433] [2021-07-13 20:37:12,986 INFO L93 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) [2021-07-13 20:37:13,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:37:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:37:13,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:13,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:13,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:13,165 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 16 treesize of output 10 [2021-07-13 20:37:13,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:13,177 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 11 treesize of output 3 [2021-07-13 20:37:13,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,211 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-07-13 20:37:13,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:13,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:37:13,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:13,235 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-07-13 20:37:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510288433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:13,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:13,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:37:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931998343] [2021-07-13 20:37:13,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:13,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:13,279 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-13 20:37:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:13,444 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-13 20:37:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:37:13,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 22 [2021-07-13 20:37:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:13,445 INFO L225 Difference]: With dead ends: 296 [2021-07-13 20:37:13,446 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 20:37:13,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 20:37:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-13 20:37:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:37:13,452 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:37:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:13,452 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:37:13,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-13 20:37:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:37:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:37:13,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:13,454 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:13,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:37:13,669 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-13 20:37:13,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:13,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610558539] [2021-07-13 20:37:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:13,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:13,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610558539] [2021-07-13 20:37:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610558539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336382296] [2021-07-13 20:37:13,835 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 20:37:13,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:13,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:37:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:14,020 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:14,020 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:37:14,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:14,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:14,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:14,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:14,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:14,089 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:14,089 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:37:14,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:14,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:14,098 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:37:14,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:14,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:14,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:37:14,149 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:98 [2021-07-13 20:37:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336382296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:14,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:14,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569225241] [2021-07-13 20:37:14,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:14,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:14,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:14,271 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:37:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:14,574 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-13 20:37:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:37:14,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:37:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:14,576 INFO L225 Difference]: With dead ends: 409 [2021-07-13 20:37:14,576 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 20:37:14,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 20:37:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-13 20:37:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:37:14,582 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:37:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:14,584 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:37:14,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:37:14,586 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:37:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:14,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:14,587 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:14,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:14,797 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-13 20:37:14,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:14,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230729368] [2021-07-13 20:37:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:14,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230729368] [2021-07-13 20:37:14,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230729368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729686806] [2021-07-13 20:37:14,832 INFO L93 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 [2021-07-13 20:37:14,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:14,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729686806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:14,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:14,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785966778] [2021-07-13 20:37:14,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:14,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:14,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:14,934 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:37:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:15,316 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:37:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:37:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-07-13 20:37:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:15,319 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:37:15,319 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:37:15,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:37:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:37:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:37:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:37:15,327 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:37:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:15,327 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:37:15,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:37:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:37:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:15,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:15,328 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:15,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:37:15,541 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-13 20:37:15,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:15,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676161409] [2021-07-13 20:37:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:15,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676161409] [2021-07-13 20:37:15,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676161409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258674818] [2021-07-13 20:37:15,574 INFO L93 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 [2021-07-13 20:37:15,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:15,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:15,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258674818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:15,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:15,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913819394] [2021-07-13 20:37:15,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:15,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:15,686 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:16,391 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:37:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:37:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:37:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:16,395 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:37:16,395 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:37:16,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:37:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:37:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:37:16,407 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:37:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:16,407 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:37:16,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:37:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:16,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:16,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:16,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:16,625 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:16,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-13 20:37:16,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:16,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453035093] [2021-07-13 20:37:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:16,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:16,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453035093] [2021-07-13 20:37:16,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453035093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:16,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907394837] [2021-07-13 20:37:16,670 INFO 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 [2021-07-13 20:37:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:16,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:16,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:16,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907394837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:16,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:16,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:16,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076885072] [2021-07-13 20:37:16,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:16,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:16,780 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:17,423 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:37:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:37:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:37:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:17,428 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:37:17,428 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:37:17,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:37:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:37:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:37:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:37:17,438 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:37:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:17,439 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:37:17,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:37:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:17,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:17,440 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:17,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:17,653 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-13 20:37:17,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:17,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278312017] [2021-07-13 20:37:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:17,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278312017] [2021-07-13 20:37:17,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278312017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454921229] [2021-07-13 20:37:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:37:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:37:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:17,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454921229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:17,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:17,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:37:17,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774461627] [2021-07-13 20:37:17,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:37:17,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:37:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:37:17,771 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:37:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:17,876 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:37:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:37:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-13 20:37:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:17,879 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:37:17,879 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:37:17,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:37:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:37:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:37:17,895 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:37:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:17,895 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:37:17,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:37:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:37:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:17,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:17,897 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:18,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:37:18,113 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:18,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-13 20:37:18,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:18,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112076122] [2021-07-13 20:37:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:18,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112076122] [2021-07-13 20:37:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112076122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056041813] [2021-07-13 20:37:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:37:18,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:18,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:18,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056041813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:18,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:37:18,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836767799] [2021-07-13 20:37:18,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:18,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:18,326 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:37:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:18,578 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:37:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:37:18,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 [2021-07-13 20:37:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:18,581 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:37:18,581 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:37:18,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:37:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:37:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:37:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:37:18,591 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:37:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:18,592 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:37:18,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:37:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:37:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:18,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:18,593 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:18,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:18,811 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-13 20:37:18,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:18,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097041603] [2021-07-13 20:37:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:18,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:18,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097041603] [2021-07-13 20:37:18,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097041603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252533262] [2021-07-13 20:37:18,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:37:18,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:18,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:37:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252533262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:18,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:37:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945254955] [2021-07-13 20:37:18,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:37:18,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:37:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:37:18,923 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:37:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:19,010 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:37:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:37:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-13 20:37:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:19,014 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:37:19,014 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:37:19,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:37:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:37:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:37:19,026 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:37:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:19,026 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:37:19,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:37:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:37:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:19,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:19,027 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:19,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:19,241 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-13 20:37:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:19,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338590742] [2021-07-13 20:37:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:19,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338590742] [2021-07-13 20:37:19,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338590742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221231086] [2021-07-13 20:37:19,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:37:19,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:19,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221231086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:19,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:19,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:19,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584378801] [2021-07-13 20:37:19,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:19,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:19,386 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:37:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:19,634 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:37:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:37:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-13 20:37:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:19,639 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:37:19,639 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:37:19,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:37:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:37:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:37:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:37:19,654 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:37:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:19,654 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:37:19,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:37:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:37:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:19,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:19,655 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:19,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:37:19,873 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-13 20:37:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:19,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108671594] [2021-07-13 20:37:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:19,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:19,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108671594] [2021-07-13 20:37:19,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108671594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:19,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371654678] [2021-07-13 20:37:19,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:37:19,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371654678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:20,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:20,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:20,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53754097] [2021-07-13 20:37:20,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:20,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:20,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:20,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:20,001 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:37:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:20,378 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:37:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:37:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-13 20:37:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:20,383 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:37:20,384 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:37:20,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:37:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:37:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:37:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:37:20,402 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:37:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:20,402 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:37:20,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:37:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:37:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:20,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:20,403 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:20,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:37:20,609 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-13 20:37:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134880850] [2021-07-13 20:37:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:20,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:20,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134880850] [2021-07-13 20:37:20,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134880850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:20,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815099199] [2021-07-13 20:37:20,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:20,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:20,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815099199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:20,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:20,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:37:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038577277] [2021-07-13 20:37:20,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:20,755 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:37:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:21,015 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:37:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 [2021-07-13 20:37:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:21,020 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:37:21,020 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:37:21,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:37:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:37:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:37:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:37:21,038 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:37:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:21,038 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:37:21,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:37:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:37:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:21,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:21,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:21,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 20:37:21,253 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-13 20:37:21,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:21,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705498081] [2021-07-13 20:37:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:21,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705498081] [2021-07-13 20:37:21,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705498081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164973936] [2021-07-13 20:37:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:21,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:21,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164973936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:21,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:37:21,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869224276] [2021-07-13 20:37:21,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:21,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:21,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:21,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:21,376 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:37:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:21,626 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:37:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:37:21,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-07-13 20:37:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:21,631 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:37:21,631 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:37:21,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:37:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:37:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:37:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:37:21,647 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:37:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:21,648 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:37:21,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:37:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:37:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:21,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:21,649 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:21,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:21,865 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-13 20:37:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817846002] [2021-07-13 20:37:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:21,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817846002] [2021-07-13 20:37:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817846002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233618679] [2021-07-13 20:37:21,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:21,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233618679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:21,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:21,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587527617] [2021-07-13 20:37:21,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:21,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:21,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:21,991 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:37:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:22,339 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:37:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:37:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-13 20:37:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:22,344 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:37:22,345 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:37:22,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:37:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:37:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:37:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:37:22,362 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:37:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:22,362 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:37:22,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:37:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:37:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:22,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:22,364 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:22,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:22,571 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-13 20:37:22,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:22,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883023585] [2021-07-13 20:37:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:22,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:22,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883023585] [2021-07-13 20:37:22,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883023585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:22,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645009466] [2021-07-13 20:37:22,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:37:22,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:22,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645009466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:22,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:22,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746156348] [2021-07-13 20:37:22,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:22,726 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:23,396 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:37:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:37:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:37:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:23,406 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:37:23,406 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:37:23,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:37:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:37:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:37:23,433 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:37:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:23,433 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:37:23,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:37:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:23,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:23,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:23,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:23,649 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-13 20:37:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:23,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380455375] [2021-07-13 20:37:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:23,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:23,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380455375] [2021-07-13 20:37:23,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380455375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:23,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610780201] [2021-07-13 20:37:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:23,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:23,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:23,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610780201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:23,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:23,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:23,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338806058] [2021-07-13 20:37:23,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:23,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:23,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:23,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:23,789 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:24,455 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:37:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:37:24,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:37:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:24,462 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:37:24,462 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:37:24,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 392.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:37:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:37:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:37:24,489 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:37:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:24,489 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:37:24,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:37:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:24,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:24,491 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:24,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:37:24,705 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-13 20:37:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:24,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243530362] [2021-07-13 20:37:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:24,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:24,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243530362] [2021-07-13 20:37:24,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243530362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:24,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66460126] [2021-07-13 20:37:24,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:24,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66460126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:24,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237187936] [2021-07-13 20:37:24,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:24,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:24,831 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:25,443 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:37:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:37:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:25,449 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:37:25,450 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:37:25,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:37:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:37:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:37:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:37:25,476 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:37:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:25,476 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:37:25,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:37:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:25,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:25,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:37:25,693 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-13 20:37:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443987887] [2021-07-13 20:37:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:25,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443987887] [2021-07-13 20:37:25,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443987887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435645720] [2021-07-13 20:37:25,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:37:25,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:37:25,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:25,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:25,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435645720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:25,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:25,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:25,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506056330] [2021-07-13 20:37:25,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:25,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:25,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:25,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:25,823 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:26,343 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:37:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:37:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:26,348 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:37:26,348 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:37:26,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:37:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:37:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:37:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:37:26,375 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:37:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:26,375 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:37:26,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:37:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:26,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:26,376 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:26,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:37:26,593 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-13 20:37:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:26,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501581328] [2021-07-13 20:37:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:26,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:26,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501581328] [2021-07-13 20:37:26,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501581328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:26,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547467028] [2021-07-13 20:37:26,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:26,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:26,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:26,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:26,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:26,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547467028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:26,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:26,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:26,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242389620] [2021-07-13 20:37:26,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:26,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:26,745 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:27,359 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:37:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:37:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:27,365 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:37:27,365 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:37:27,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:37:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:37:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:37:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:37:27,395 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:37:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:27,395 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:37:27,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:37:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:27,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:27,397 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:27,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:37:27,617 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:27,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-13 20:37:27,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:27,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14042502] [2021-07-13 20:37:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:27,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14042502] [2021-07-13 20:37:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14042502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368726130] [2021-07-13 20:37:27,648 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 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 [2021-07-13 20:37:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:27,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368726130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:27,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:27,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:27,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981318234] [2021-07-13 20:37:27,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:27,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:27,749 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:28,329 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:37:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:37:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:28,334 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:37:28,334 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:37:28,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:37:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:37:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:37:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:37:28,358 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:37:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:28,358 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:37:28,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:37:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:28,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:28,360 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:28,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:37:28,576 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-13 20:37:28,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:28,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436625528] [2021-07-13 20:37:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:28,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:28,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436625528] [2021-07-13 20:37:28,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436625528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:28,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992688035] [2021-07-13 20:37:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:37:28,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:37:28,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:28,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:37:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:28,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992688035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:28,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:28,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:37:28,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487723451] [2021-07-13 20:37:28,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:37:28,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:28,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:37:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:37:28,669 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:37:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:28,736 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:37:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:37:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-13 20:37:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:28,739 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:37:28,739 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:37:28,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:37:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:37:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:37:28,750 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:37:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:28,750 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:37:28,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:37:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:37:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:28,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:28,752 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:28,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:28,968 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:28,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-13 20:37:28,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:28,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532374488] [2021-07-13 20:37:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:29,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:29,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532374488] [2021-07-13 20:37:29,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532374488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:29,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992551796] [2021-07-13 20:37:29,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:37:29,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:29,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992551796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:29,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:29,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:37:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769843424] [2021-07-13 20:37:29,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:37:29,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:37:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:37:29,071 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:37:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:29,328 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:37:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:37:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 [2021-07-13 20:37:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:29,331 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:37:29,331 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:37:29,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:37:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:37:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:37:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:37:29,360 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:37:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:29,360 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:37:29,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:37:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:37:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:29,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:29,363 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:29,577 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-13 20:37:29,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:29,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843661550] [2021-07-13 20:37:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:29,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843661550] [2021-07-13 20:37:29,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843661550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654158731] [2021-07-13 20:37:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:37:29,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:29,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:29,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:29,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654158731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:29,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:29,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:37:29,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531974210] [2021-07-13 20:37:29,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:37:29,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:37:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:37:29,674 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:37:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:29,887 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:37:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:37:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 [2021-07-13 20:37:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:29,894 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:37:29,894 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:37:29,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:37:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:37:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:37:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 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) [2021-07-13 20:37:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:37:29,910 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:37:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:29,911 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:37:29,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:37:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:37:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:29,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:29,913 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:30,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:30,129 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-13 20:37:30,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:30,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806330182] [2021-07-13 20:37:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:30,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:30,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806330182] [2021-07-13 20:37:30,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806330182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933532788] [2021-07-13 20:37:30,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:30,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:30,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:30,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:30,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:30,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933532788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:30,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:37:30,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317497787] [2021-07-13 20:37:30,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:37:30,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:30,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:37:30,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:37:30,220 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:37:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:30,405 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:37:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:37:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 [2021-07-13 20:37:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:30,408 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:37:30,408 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:37:30,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:37:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:37:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:37:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:37:30,427 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:37:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:30,427 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:37:30,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:37:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:37:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:30,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:30,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:30,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 20:37:30,637 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-13 20:37:30,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:30,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720363590] [2021-07-13 20:37:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:30,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:30,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720363590] [2021-07-13 20:37:30,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720363590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120893753] [2021-07-13 20:37:30,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:37:30,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:30,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:30,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120893753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:30,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:37:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974053778] [2021-07-13 20:37:30,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:37:30,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:37:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:37:30,735 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:37:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:30,929 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:37:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:37:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 [2021-07-13 20:37:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:30,933 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:37:30,933 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:37:30,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:37:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:37:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:37:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 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) [2021-07-13 20:37:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:37:30,948 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:37:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:30,948 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:37:30,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:37:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:37:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:30,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:30,949 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:31,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:31,150 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-13 20:37:31,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:31,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069795055] [2021-07-13 20:37:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:31,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069795055] [2021-07-13 20:37:31,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069795055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397204426] [2021-07-13 20:37:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:37:31,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:31,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:31,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397204426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:31,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:31,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:31,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951205261] [2021-07-13 20:37:31,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:31,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:31,278 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:31,753 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:37:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:37:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:37:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:31,757 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:37:31,757 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:37:31,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:37:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:37:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:37:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:37:31,778 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:37:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:31,779 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:37:31,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:37:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:31,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:31,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:31,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:37:31,996 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-13 20:37:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:31,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114038422] [2021-07-13 20:37:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:32,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114038422] [2021-07-13 20:37:32,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114038422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146901793] [2021-07-13 20:37:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:37:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:32,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146901793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:32,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:32,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865160194] [2021-07-13 20:37:32,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:32,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:32,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:32,128 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:32,544 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:37:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:37:32,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:37:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:32,549 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:37:32,549 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:37:32,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:37:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:37:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:37:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:37:32,569 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:37:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:32,569 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:37:32,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:37:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:37:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:32,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:32,571 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:32,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:32,787 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-13 20:37:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:32,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244335327] [2021-07-13 20:37:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:32,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244335327] [2021-07-13 20:37:32,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244335327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848105418] [2021-07-13 20:37:32,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:37:32,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:32,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848105418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:32,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996070873] [2021-07-13 20:37:32,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:32,909 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:33,284 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:37:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:37:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:33,288 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:37:33,288 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:37:33,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:37:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:37:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:37:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:37:33,308 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:37:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:33,308 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:37:33,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:37:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:33,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:33,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:33,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:37:33,522 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-13 20:37:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:33,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129947813] [2021-07-13 20:37:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:33,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:33,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129947813] [2021-07-13 20:37:33,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129947813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:33,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965801442] [2021-07-13 20:37:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:33,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:33,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:33,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965801442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:33,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:33,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026088985] [2021-07-13 20:37:33,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:33,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:33,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:33,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:33,650 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:33,995 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:37:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:37:33,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:33,998 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:37:33,998 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:37:33,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:37:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:37:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:37:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:37:34,018 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:37:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:34,018 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:37:34,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:37:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:34,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:34,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:34,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:34,235 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-13 20:37:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656591690] [2021-07-13 20:37:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:34,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656591690] [2021-07-13 20:37:34,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656591690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564029946] [2021-07-13 20:37:34,270 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 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 [2021-07-13 20:37:34,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:34,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:34,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564029946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:34,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:34,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:34,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919843451] [2021-07-13 20:37:34,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:34,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:34,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:34,364 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:34,701 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:37:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:37:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:34,705 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:37:34,705 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:37:34,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:37:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:37:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:37:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:37:34,726 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:37:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:34,726 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:37:34,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:37:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:34,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:34,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:34,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:37:34,928 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-13 20:37:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:34,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161489736] [2021-07-13 20:37:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:34,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:34,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161489736] [2021-07-13 20:37:34,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161489736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492035531] [2021-07-13 20:37:34,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:37:34,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492035531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:35,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920758333] [2021-07-13 20:37:35,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:35,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:35,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:35,057 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:35,408 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:37:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:37:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:35,411 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:37:35,411 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:37:35,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:37:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:37:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:37:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:37:35,434 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:37:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:35,434 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:37:35,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:37:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:35,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:35,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:35,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:37:35,645 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-13 20:37:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882365094] [2021-07-13 20:37:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:35,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882365094] [2021-07-13 20:37:35,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882365094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956895262] [2021-07-13 20:37:35,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:37:35,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:35,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956895262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:35,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:35,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789719573] [2021-07-13 20:37:35,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:35,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:35,749 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:37:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:36,063 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:37:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:37:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-13 20:37:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:36,066 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:37:36,066 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:37:36,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:37:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:37:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:37:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:37:36,085 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:37:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:36,086 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:37:36,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:37:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:37:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:36,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:36,089 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:36,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:36,293 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:36,293 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-13 20:37:36,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:36,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634816308] [2021-07-13 20:37:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:36,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634816308] [2021-07-13 20:37:36,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634816308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147323164] [2021-07-13 20:37:36,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:37:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:36,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:36,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147323164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:36,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936710311] [2021-07-13 20:37:36,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:36,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:36,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:36,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:36,396 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:37:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:36,645 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:37:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:37:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-13 20:37:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:36,648 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:37:36,648 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:37:36,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:37:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:37:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:37:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:37:36,668 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:37:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:36,668 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:37:36,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:37:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:37:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:36,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:36,670 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:36,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:36,874 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-13 20:37:36,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:36,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151797915] [2021-07-13 20:37:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151797915] [2021-07-13 20:37:36,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151797915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836408203] [2021-07-13 20:37:36,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:37:36,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:36,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836408203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:36,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:36,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739723624] [2021-07-13 20:37:36,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:36,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:36,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:36,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:36,976 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:37:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:37,164 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:37:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:37:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-13 20:37:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:37,167 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:37:37,167 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:37:37,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:37:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:37:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:37:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 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) [2021-07-13 20:37:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:37:37,184 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:37:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:37,184 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:37:37,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:37:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:37:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:37,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:37,186 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:37,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:37,387 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-13 20:37:37,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:37,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550099106] [2021-07-13 20:37:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:37,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550099106] [2021-07-13 20:37:37,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550099106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715891983] [2021-07-13 20:37:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:37:37,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:37,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715891983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:37,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:37,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:37,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312729500] [2021-07-13 20:37:37,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:37,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:37,509 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:37,821 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:37:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:37:37,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:37,824 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:37:37,825 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:37:37,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:37:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:37:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:37:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:37:37,849 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:37:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:37,849 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:37:37,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:37:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:37,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:37,851 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:38,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:38,065 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-13 20:37:38,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:38,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144111098] [2021-07-13 20:37:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:38,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144111098] [2021-07-13 20:37:38,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144111098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839374092] [2021-07-13 20:37:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:37:38,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:38,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839374092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:38,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:37:38,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460102055] [2021-07-13 20:37:38,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:38,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:38,186 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:38,452 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:37:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:37:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:38,455 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:37:38,455 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:37:38,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:37:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:37:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:37:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:37:38,472 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:37:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:38,472 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:37:38,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:37:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:37:38,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:38,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:38,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 20:37:38,674 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:38,674 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-13 20:37:38,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:38,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564253407] [2021-07-13 20:37:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:38,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564253407] [2021-07-13 20:37:38,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564253407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184057595] [2021-07-13 20:37:38,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:37:38,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:38,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184057595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:38,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:37:38,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056180306] [2021-07-13 20:37:38,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:38,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:38,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:38,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:38,780 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:38,938 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:37:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:38,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:37:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:38,941 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:37:38,941 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:37:38,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:37:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:37:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 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) [2021-07-13 20:37:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:37:38,957 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:37:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:38,957 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:37:38,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:37:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:38,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:38,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:39,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:39,173 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-13 20:37:39,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:39,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496599480] [2021-07-13 20:37:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:39,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:39,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496599480] [2021-07-13 20:37:39,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496599480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:39,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558910144] [2021-07-13 20:37:39,699 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 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 [2021-07-13 20:37:39,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:39,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:40,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:40,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:37:40,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:40,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:37:40,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:37:40,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:37:40,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,207 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,214 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,220 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,226 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:37:40,234 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,249 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,324 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:37:40,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:40,326 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:37:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:40,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558910144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:40,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:40,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:37:40,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691534461] [2021-07-13 20:37:40,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:40,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:40,395 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:41,042 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-07-13 20:37:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:41,292 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-13 20:37:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:41,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:41,295 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:37:41,295 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 20:37:41,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1222.9ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:37:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 20:37:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-13 20:37:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:37:41,311 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:37:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:41,311 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:37:41,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:37:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:41,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:41,313 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:41,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 20:37:41,520 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-13 20:37:41,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:41,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421811430] [2021-07-13 20:37:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:42,186 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:37:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:42,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421811430] [2021-07-13 20:37:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421811430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392314762] [2021-07-13 20:37:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:42,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:42,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:42,700 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:37:42,756 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_5, v_prenex_7], 3=[v_prenex_9, A]} [2021-07-13 20:37:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:42,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:42,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,899 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-13 20:37:42,899 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-07-13 20:37:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:42,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:42,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:37:42,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:42,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:43,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:43,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:43,027 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-07-13 20:37:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392314762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:37:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372009910] [2021-07-13 20:37:43,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:43,093 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:43,937 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-07-13 20:37:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:43,940 INFO L225 Difference]: With dead ends: 1495 [2021-07-13 20:37:43,940 INFO L226 Difference]: Without dead ends: 1480 [2021-07-13 20:37:43,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1451.1ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:37:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-07-13 20:37:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-07-13 20:37:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:37:43,956 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:37:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:43,956 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:37:43,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:37:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:43,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:43,958 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:44,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:44,173 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-13 20:37:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33605438] [2021-07-13 20:37:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:44,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33605438] [2021-07-13 20:37:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33605438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384465117] [2021-07-13 20:37:44,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:37:44,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:45,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:37:45,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:37:45,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:37:45,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:37:45,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:37:45,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:37:45,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:45,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:37:45,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:37:45,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:45,330 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:37:45,344 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:37:45,352 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:37:45,360 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:37:45,368 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:37:45,374 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,396 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:37:45,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:45,398 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:37:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384465117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:45,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:45,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:37:45,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736566031] [2021-07-13 20:37:45,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:45,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:45,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:45,436 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:46,848 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-13 20:37:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:37:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:46,851 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:37:46,851 INFO L226 Difference]: Without dead ends: 1592 [2021-07-13 20:37:46,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1653.0ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:37:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-13 20:37:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-13 20:37:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:37:46,868 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:37:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:46,868 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:37:46,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:37:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:46,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:46,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:47,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:37:47,071 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-13 20:37:47,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:47,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285148136] [2021-07-13 20:37:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:47,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285148136] [2021-07-13 20:37:47,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285148136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996167737] [2021-07-13 20:37:47,522 INFO L93 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 [2021-07-13 20:37:47,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,776 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:37:47,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,784 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:37:47,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:47,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:37:47,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:37:47,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:37:47,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:47,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,855 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:37:47,856 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:47,870 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:47,882 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:47,891 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:47,899 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:47,911 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:47,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:47,922 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,933 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:37:47,934 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:37:47,940 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:48,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:48,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:48,008 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:37:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996167737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:48,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:48,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:48,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497232949] [2021-07-13 20:37:48,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:48,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:48,200 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:48,623 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-07-13 20:37:48,892 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:37:49,305 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-13 20:37:49,835 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-13 20:37:49,975 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-13 20:37:50,181 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-13 20:37:50,436 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-07-13 20:37:50,586 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-13 20:37:50,868 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:37:51,172 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-13 20:37:51,439 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-07-13 20:37:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:51,495 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-07-13 20:37:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:37:51,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:51,498 INFO L225 Difference]: With dead ends: 1842 [2021-07-13 20:37:51,498 INFO L226 Difference]: Without dead ends: 1827 [2021-07-13 20:37:51,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3252.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:37:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-07-13 20:37:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-07-13 20:37:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-13 20:37:51,516 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-13 20:37:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:51,516 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-13 20:37:51,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-13 20:37:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:51,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:51,518 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:51,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:51,719 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-13 20:37:51,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:51,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220798662] [2021-07-13 20:37:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:52,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220798662] [2021-07-13 20:37:52,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220798662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512064218] [2021-07-13 20:37:52,128 INFO 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 [2021-07-13 20:37:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:37:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:37:52,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:37:52,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:37:52,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:37:52,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:37:52,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:37:52,748 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:37:52,758 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:37:52,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:37:52,775 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:37:52,785 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:37:52,792 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:37:52,802 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:37:52,810 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:37:52,817 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:37:52,824 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:52,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:37:52,832 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:52,862 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:37:52,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:52,863 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-13 20:37:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:52,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512064218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:52,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:52,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:37:52,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821937765] [2021-07-13 20:37:52,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:52,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:52,899 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:53,932 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-07-13 20:37:54,077 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2021-07-13 20:37:54,256 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:37:54,392 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-07-13 20:37:54,854 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-07-13 20:37:55,279 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-13 20:37:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:55,416 INFO L93 Difference]: Finished difference Result 1797 states and 5747 transitions. [2021-07-13 20:37:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:37:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:55,419 INFO L225 Difference]: With dead ends: 1797 [2021-07-13 20:37:55,419 INFO L226 Difference]: Without dead ends: 1782 [2021-07-13 20:37:55,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2505.6ms TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:37:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-07-13 20:37:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1206. [2021-07-13 20:37:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-13 20:37:55,436 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-13 20:37:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:55,436 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-13 20:37:55,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-13 20:37:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:55,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:55,438 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:55,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-13 20:37:55,639 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:55,639 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-13 20:37:55,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:55,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294453984] [2021-07-13 20:37:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:56,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294453984] [2021-07-13 20:37:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294453984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220778340] [2021-07-13 20:37:56,113 INFO L93 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 [2021-07-13 20:37:56,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:37:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,797 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:37:56,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-07-13 20:37:56,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,849 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:37:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-07-13 20:37:56,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,884 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:56,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:37:56,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,926 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:37:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-13 20:37:56,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,975 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:37:56,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-13 20:37:56,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,022 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-13 20:37:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-07-13 20:37:57,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,045 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:57,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:37:57,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,096 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:37:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-07-13 20:37:57,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,129 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:37:57,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,178 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:37:57,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-13 20:37:57,184 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,203 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:57,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:37:57,205 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,244 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:37:57,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-13 20:37:57,267 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,285 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:37:57,286 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,304 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:57,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:37:57,305 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,347 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:37:57,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-07-13 20:37:57,368 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,381 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:37:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:37:57,382 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,684 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 20:37:57,685 INFO L628 ElimStorePlain]: treesize reduction 109, result has 76.9 percent of original size [2021-07-13 20:37:57,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:57,698 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:437 [2021-07-13 20:37:57,956 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-07-13 20:37:58,103 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-07-13 20:37:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:58,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220778340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:58,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:58,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:37:58,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733128311] [2021-07-13 20:37:58,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:37:58,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:58,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:37:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:37:58,135 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:59,740 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-07-13 20:37:59,883 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-07-13 20:38:00,062 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-13 20:38:00,513 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-07-13 20:38:01,017 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2021-07-13 20:38:01,372 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2021-07-13 20:38:01,518 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:38:01,669 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-13 20:38:02,049 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-07-13 20:38:02,407 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-07-13 20:38:02,601 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2021-07-13 20:38:02,846 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 20:38:03,060 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-13 20:38:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:03,290 INFO L93 Difference]: Finished difference Result 2305 states and 7128 transitions. [2021-07-13 20:38:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:38:03,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:03,294 INFO L225 Difference]: With dead ends: 2305 [2021-07-13 20:38:03,294 INFO L226 Difference]: Without dead ends: 2260 [2021-07-13 20:38:03,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 5419.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2940, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:38:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-07-13 20:38:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1349. [2021-07-13 20:38:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.306379821958457) internal successors, (4457), 1348 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) [2021-07-13 20:38:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4457 transitions. [2021-07-13 20:38:03,314 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4457 transitions. Word has length 26 [2021-07-13 20:38:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4457 transitions. [2021-07-13 20:38:03,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4457 transitions. [2021-07-13 20:38:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:03,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:03,316 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:03,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:03,517 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-13 20:38:03,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:03,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759907566] [2021-07-13 20:38:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:04,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:04,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759907566] [2021-07-13 20:38:04,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759907566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:04,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643879100] [2021-07-13 20:38:04,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:38:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:38:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:04,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:04,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:04,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:04,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:04,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:04,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:04,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:04,446 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:04,452 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:04,458 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:04,464 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:04,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:04,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:38:04,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:04,493 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,564 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:38:04,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:04,566 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:38:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:04,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643879100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:04,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:04,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:04,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702270740] [2021-07-13 20:38:04,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:04,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:04,616 INFO L87 Difference]: Start difference. First operand 1349 states and 4457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:05,582 INFO L93 Difference]: Finished difference Result 1744 states and 5646 transitions. [2021-07-13 20:38:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:38:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:05,585 INFO L225 Difference]: With dead ends: 1744 [2021-07-13 20:38:05,585 INFO L226 Difference]: Without dead ends: 1729 [2021-07-13 20:38:05,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:38:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-07-13 20:38:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1360. [2021-07-13 20:38:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3038999264164826) internal successors, (4490), 1359 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) [2021-07-13 20:38:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4490 transitions. [2021-07-13 20:38:05,604 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4490 transitions. Word has length 26 [2021-07-13 20:38:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:05,604 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4490 transitions. [2021-07-13 20:38:05,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4490 transitions. [2021-07-13 20:38:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:05,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:05,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:05,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 20:38:05,818 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:05,818 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-13 20:38:05,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:05,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878534715] [2021-07-13 20:38:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:06,384 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:38:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:06,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:06,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878534715] [2021-07-13 20:38:06,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878534715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:06,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673451172] [2021-07-13 20:38:06,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:38:06,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:06,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:06,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:38:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:06,803 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:38:06,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:06,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:06,938 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:38:06,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:38:06,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:06,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:06,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,967 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:06,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-07-13 20:38:06,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,377 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2021-07-13 20:38:07,377 INFO L628 ElimStorePlain]: treesize reduction 403, result has 46.9 percent of original size [2021-07-13 20:38:07,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:38:07,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,523 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:38:07,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:38:07,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,672 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:38:07,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,695 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:07,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:38:07,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,826 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:38:07,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,843 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:07,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:38:07,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,966 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:38:07,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,991 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:07,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:38:07,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,107 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:38:08,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:08,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-07-13 20:38:08,124 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,241 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:38:08,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,258 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:08,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:38:08,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,373 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-13 20:38:08,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:08,390 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:825, output treesize:551 [2021-07-13 20:38:08,654 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:38:08,851 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:38:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:08,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673451172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:08,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:08,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:38:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164932872] [2021-07-13 20:38:08,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:08,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:08,961 INFO L87 Difference]: Start difference. First operand 1360 states and 4490 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,904 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-07-13 20:38:10,268 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-13 20:38:10,503 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2021-07-13 20:38:10,813 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2021-07-13 20:38:11,157 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:38:11,647 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-13 20:38:12,042 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-13 20:38:12,404 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-07-13 20:38:12,548 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-13 20:38:12,800 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-07-13 20:38:13,139 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-07-13 20:38:13,553 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-13 20:38:13,777 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-07-13 20:38:14,275 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2021-07-13 20:38:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:14,367 INFO L93 Difference]: Finished difference Result 2016 states and 6372 transitions. [2021-07-13 20:38:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:38:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:14,370 INFO L225 Difference]: With dead ends: 2016 [2021-07-13 20:38:14,371 INFO L226 Difference]: Without dead ends: 2001 [2021-07-13 20:38:14,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 5875.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:38:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-07-13 20:38:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1371. [2021-07-13 20:38:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3124087591240876) internal successors, (4538), 1370 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4538 transitions. [2021-07-13 20:38:14,391 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4538 transitions. Word has length 26 [2021-07-13 20:38:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:14,391 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4538 transitions. [2021-07-13 20:38:14,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4538 transitions. [2021-07-13 20:38:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:14,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:14,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:14,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-07-13 20:38:14,594 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:14,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-07-13 20:38:14,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:14,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615122515] [2021-07-13 20:38:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:14,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615122515] [2021-07-13 20:38:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615122515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130951427] [2021-07-13 20:38:14,954 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 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 [2021-07-13 20:38:14,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:14,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:14,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:14,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:15,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:15,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:15,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:15,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:15,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:15,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:15,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:15,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:15,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:15,438 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:15,443 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:15,448 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:38:15,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:15,459 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:15,463 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,538 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:38:15,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:15,539 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:38:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130951427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:15,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:15,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121876511] [2021-07-13 20:38:15,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:15,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:15,604 INFO L87 Difference]: Start difference. First operand 1371 states and 4538 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:16,846 INFO L93 Difference]: Finished difference Result 1859 states and 6002 transitions. [2021-07-13 20:38:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:38:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:16,850 INFO L225 Difference]: With dead ends: 1859 [2021-07-13 20:38:16,850 INFO L226 Difference]: Without dead ends: 1844 [2021-07-13 20:38:16,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1441.0ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:38:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-13 20:38:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1380. [2021-07-13 20:38:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:38:16,868 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:38:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:16,868 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:38:16,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:38:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:16,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:16,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:17,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:17,071 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-07-13 20:38:17,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:17,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388421646] [2021-07-13 20:38:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:17,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:17,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388421646] [2021-07-13 20:38:17,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388421646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:17,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242389327] [2021-07-13 20:38:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:38:17,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:17,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:17,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:17,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:17,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:17,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:17,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:17,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:17,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:17,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:17,900 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:17,905 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:17,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:17,916 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:17,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:17,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:17,934 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:38:17,938 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,006 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:38:18,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:18,008 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:38:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:18,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242389327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:18,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:18,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:38:18,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487614216] [2021-07-13 20:38:18,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:18,064 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:18,742 INFO L93 Difference]: Finished difference Result 1722 states and 5631 transitions. [2021-07-13 20:38:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:38:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:18,745 INFO L225 Difference]: With dead ends: 1722 [2021-07-13 20:38:18,745 INFO L226 Difference]: Without dead ends: 1707 [2021-07-13 20:38:18,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:38:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-07-13 20:38:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1380. [2021-07-13 20:38:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:38:18,763 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:38:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:18,763 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:38:18,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:38:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:18,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:18,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:18,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-13 20:38:18,966 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-07-13 20:38:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:18,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887169462] [2021-07-13 20:38:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:19,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:19,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887169462] [2021-07-13 20:38:19,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887169462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:19,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091389618] [2021-07-13 20:38:19,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:38:19,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:19,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:19,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:38:19,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:19,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:19,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,730 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:19,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,742 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:19,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:19,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:38:19,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:19,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:38:19,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:19,800 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:38:19,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:19,825 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,832 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:38:19,833 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,843 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:19,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:19,845 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:38:19,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,862 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:38:19,863 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:19,868 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:19,869 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:19,949 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:38:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:20,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091389618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:20,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:20,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:38:20,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822026406] [2021-07-13 20:38:20,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:20,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:20,135 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:20,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 39 [2021-07-13 20:38:21,248 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-07-13 20:38:21,649 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-07-13 20:38:22,518 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:38:22,679 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:38:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:22,830 INFO L93 Difference]: Finished difference Result 2174 states and 6962 transitions. [2021-07-13 20:38:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:38:22,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:22,834 INFO L225 Difference]: With dead ends: 2174 [2021-07-13 20:38:22,834 INFO L226 Difference]: Without dead ends: 2144 [2021-07-13 20:38:22,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2709.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-13 20:38:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1380. [2021-07-13 20:38:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:38:22,856 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:38:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:22,856 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:38:22,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:38:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:22,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:22,858 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:23,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-13 20:38:23,059 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:23,059 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-07-13 20:38:23,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:23,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78500171] [2021-07-13 20:38:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:23,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:23,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78500171] [2021-07-13 20:38:23,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78500171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143421400] [2021-07-13 20:38:23,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:38:23,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:23,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:23,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:23,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:23,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:23,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,792 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:38:23,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,800 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:23,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:38:23,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:38:23,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:38:23,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:23,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,865 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:38:23,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:23,882 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:38:23,895 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,903 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:23,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,911 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:23,912 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,922 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:23,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:23,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,933 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:23,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:23,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,946 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:38:23,947 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,952 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:23,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:24,023 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:38:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:24,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143421400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:24,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:38:24,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131711872] [2021-07-13 20:38:24,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:24,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:24,222 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:24,647 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-07-13 20:38:25,792 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-07-13 20:38:26,148 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-07-13 20:38:26,292 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 20:38:26,571 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-13 20:38:26,914 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-07-13 20:38:27,200 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-07-13 20:38:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:27,255 INFO L93 Difference]: Finished difference Result 1982 states and 6430 transitions. [2021-07-13 20:38:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:38:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:27,258 INFO L225 Difference]: With dead ends: 1982 [2021-07-13 20:38:27,258 INFO L226 Difference]: Without dead ends: 1967 [2021-07-13 20:38:27,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3239.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:38:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-13 20:38:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1380. [2021-07-13 20:38:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:38:27,278 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:38:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:27,278 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:38:27,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:38:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:27,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:27,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:27,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-13 20:38:27,481 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-13 20:38:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:27,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524926572] [2021-07-13 20:38:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:27,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:27,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524926572] [2021-07-13 20:38:27,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524926572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:27,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574809544] [2021-07-13 20:38:27,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:38:27,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:28,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:28,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:28,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:38:28,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:38:28,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:28,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:28,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:28,585 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:38:28,593 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:28,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:38:28,608 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:38:28,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:28,623 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:28,631 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:28,637 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:28,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:28,641 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,664 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:38:28,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:28,665 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:38:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:28,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574809544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:28,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:28,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:38:28,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864179893] [2021-07-13 20:38:28,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:28,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:28,701 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:29,573 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-07-13 20:38:30,092 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-07-13 20:38:30,366 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-07-13 20:38:30,524 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-13 20:38:30,959 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-13 20:38:32,085 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-07-13 20:38:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:32,744 INFO L93 Difference]: Finished difference Result 3227 states and 9972 transitions. [2021-07-13 20:38:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:38:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:32,749 INFO L225 Difference]: With dead ends: 3227 [2021-07-13 20:38:32,749 INFO L226 Difference]: Without dead ends: 3182 [2021-07-13 20:38:32,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 3868.1ms TimeCoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:38:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-13 20:38:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1395. [2021-07-13 20:38:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.33142037302726) internal successors, (4644), 1394 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) [2021-07-13 20:38:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4644 transitions. [2021-07-13 20:38:32,776 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4644 transitions. Word has length 26 [2021-07-13 20:38:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:32,776 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 4644 transitions. [2021-07-13 20:38:32,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4644 transitions. [2021-07-13 20:38:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:32,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:32,778 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:32,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-13 20:38:32,978 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-13 20:38:32,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:32,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223544875] [2021-07-13 20:38:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:33,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:33,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223544875] [2021-07-13 20:38:33,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223544875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:33,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775396259] [2021-07-13 20:38:33,517 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 20:38:33,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:38:33,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:34,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:34,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:34,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:34,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:38:34,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:34,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:34,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:38:34,130 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:38:34,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:38:34,145 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:34,153 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:34,160 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:34,168 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:34,182 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:34,190 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:38:34,194 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,219 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-13 20:38:34,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:34,220 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:38:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:34,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775396259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:34,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:34,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:38:34,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263616295] [2021-07-13 20:38:34,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:34,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:34,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:34,257 INFO L87 Difference]: Start difference. First operand 1395 states and 4644 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:35,277 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-07-13 20:38:35,859 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-07-13 20:38:36,276 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-07-13 20:38:36,674 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-13 20:38:37,488 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-07-13 20:38:37,669 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-13 20:38:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:37,913 INFO L93 Difference]: Finished difference Result 3009 states and 9476 transitions. [2021-07-13 20:38:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:38:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:37,919 INFO L225 Difference]: With dead ends: 3009 [2021-07-13 20:38:37,919 INFO L226 Difference]: Without dead ends: 2964 [2021-07-13 20:38:37,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3706.3ms TimeCoverageRelationStatistics Valid=601, Invalid=2705, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:38:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-07-13 20:38:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1398. [2021-07-13 20:38:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3335719398711525) internal successors, (4657), 1397 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4657 transitions. [2021-07-13 20:38:37,944 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4657 transitions. Word has length 26 [2021-07-13 20:38:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:37,945 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4657 transitions. [2021-07-13 20:38:37,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4657 transitions. [2021-07-13 20:38:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:37,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:37,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:38,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-13 20:38:38,147 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-13 20:38:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:38,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378713341] [2021-07-13 20:38:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:38,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378713341] [2021-07-13 20:38:38,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378713341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932582157] [2021-07-13 20:38:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:38:38,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:38:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,067 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:38:39,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:38:39,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,112 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:38:39,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-13 20:38:39,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,140 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-13 20:38:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-07-13 20:38:39,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:39,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-13 20:38:39,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,205 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-13 20:38:39,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-07-13 20:38:39,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,223 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:39,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,240 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:38:39,241 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,264 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:38:39,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:38:39,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,283 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:38:39,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,301 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:38:39,302 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,328 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:38:39,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:38:39,332 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,353 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-07-13 20:38:39,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,369 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:39,370 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,389 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-13 20:38:39,389 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,417 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:38:39,417 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,426 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:38:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:38:39,427 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,527 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-07-13 20:38:39,527 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.3 percent of original size [2021-07-13 20:38:39,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:39,529 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-13 20:38:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:39,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932582157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:39,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:39,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:38:39,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052357351] [2021-07-13 20:38:39,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:39,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:39,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:39,663 INFO L87 Difference]: Start difference. First operand 1398 states and 4657 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:40,035 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-13 20:38:40,203 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-13 20:38:40,324 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-07-13 20:38:40,646 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-07-13 20:38:40,804 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-13 20:38:41,356 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-07-13 20:38:41,838 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-13 20:38:42,123 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-07-13 20:38:42,314 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-07-13 20:38:42,622 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-07-13 20:38:42,858 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-07-13 20:38:42,985 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2021-07-13 20:38:43,224 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-07-13 20:38:43,429 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2021-07-13 20:38:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:44,044 INFO L93 Difference]: Finished difference Result 3194 states and 9881 transitions. [2021-07-13 20:38:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:38:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:44,050 INFO L225 Difference]: With dead ends: 3194 [2021-07-13 20:38:44,050 INFO L226 Difference]: Without dead ends: 3134 [2021-07-13 20:38:44,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4304.0ms TimeCoverageRelationStatistics Valid=743, Invalid=3039, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:38:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-07-13 20:38:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1411. [2021-07-13 20:38:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.3453900709219857) internal successors, (4717), 1410 states have internal predecessors, (4717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4717 transitions. [2021-07-13 20:38:44,078 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4717 transitions. Word has length 26 [2021-07-13 20:38:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:44,078 INFO L482 AbstractCegarLoop]: Abstraction has 1411 states and 4717 transitions. [2021-07-13 20:38:44,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4717 transitions. [2021-07-13 20:38:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:44,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:44,080 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:44,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-07-13 20:38:44,281 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-13 20:38:44,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:44,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099001911] [2021-07-13 20:38:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099001911] [2021-07-13 20:38:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099001911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577502871] [2021-07-13 20:38:44,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:38:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:38:44,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:44,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:44,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:45,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:45,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:38:45,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:45,017 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:45,022 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:45,028 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:45,033 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:45,038 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:45,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:45,050 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:45,054 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:45,058 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,128 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:38:45,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:45,129 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:38:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:45,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577502871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:45,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:45,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:38:45,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155964017] [2021-07-13 20:38:45,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:45,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:45,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:45,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:45,180 INFO L87 Difference]: Start difference. First operand 1411 states and 4717 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:46,291 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 20:38:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:46,966 INFO L93 Difference]: Finished difference Result 1958 states and 6368 transitions. [2021-07-13 20:38:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:38:46,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:46,969 INFO L225 Difference]: With dead ends: 1958 [2021-07-13 20:38:46,969 INFO L226 Difference]: Without dead ends: 1943 [2021-07-13 20:38:46,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1714.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:38:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-07-13 20:38:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1455. [2021-07-13 20:38:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.343878954607978) internal successors, (4862), 1454 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4862 transitions. [2021-07-13 20:38:46,989 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4862 transitions. Word has length 26 [2021-07-13 20:38:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:46,989 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4862 transitions. [2021-07-13 20:38:46,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4862 transitions. [2021-07-13 20:38:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:46,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:46,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:47,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-07-13 20:38:47,192 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:47,192 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-13 20:38:47,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:47,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104776494] [2021-07-13 20:38:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:47,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:47,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104776494] [2021-07-13 20:38:47,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104776494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:47,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749355332] [2021-07-13 20:38:47,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:38:47,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:38:47,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:47,913 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:38:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,005 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:48,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 20:38:48,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:48,140 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-13 20:38:48,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,162 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:48,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-13 20:38:48,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:48,297 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:38:48,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-13 20:38:48,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:48,498 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:38:48,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,518 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:48,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-07-13 20:38:48,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:48,649 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:38:48,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,671 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-13 20:38:48,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:48,797 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:38:48,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-07-13 20:38:48,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:48,960 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:38:48,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:48,982 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:48,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-13 20:38:48,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,108 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:38:49,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:49,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-13 20:38:49,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,253 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:38:49,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:49,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:49,268 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-13 20:38:49,547 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:38:49,760 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-07-13 20:38:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:49,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749355332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:49,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:49,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:38:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664059723] [2021-07-13 20:38:49,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:49,851 INFO L87 Difference]: Start difference. First operand 1455 states and 4862 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:50,732 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2021-07-13 20:38:51,226 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2021-07-13 20:38:51,557 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-13 20:38:51,779 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:38:52,229 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 20:38:52,445 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-13 20:38:52,728 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-13 20:38:53,076 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-07-13 20:38:53,452 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-07-13 20:38:53,709 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-07-13 20:38:54,189 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2021-07-13 20:38:54,416 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-07-13 20:38:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:54,504 INFO L93 Difference]: Finished difference Result 2081 states and 6658 transitions. [2021-07-13 20:38:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:38:54,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:54,508 INFO L225 Difference]: With dead ends: 2081 [2021-07-13 20:38:54,508 INFO L226 Difference]: Without dead ends: 2051 [2021-07-13 20:38:54,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4942.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-07-13 20:38:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1451. [2021-07-13 20:38:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3393103448275863) internal successors, (4842), 1450 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4842 transitions. [2021-07-13 20:38:54,532 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4842 transitions. Word has length 26 [2021-07-13 20:38:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:54,532 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4842 transitions. [2021-07-13 20:38:54,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4842 transitions. [2021-07-13 20:38:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:54,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:54,536 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:54,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:54,753 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1764992822, now seen corresponding path program 15 times [2021-07-13 20:38:54,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:54,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851849236] [2021-07-13 20:38:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:55,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:55,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851849236] [2021-07-13 20:38:55,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851849236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:55,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045145556] [2021-07-13 20:38:55,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:38:55,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:55,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:55,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:38:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:55,433 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:38:55,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:38:55,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,457 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:55,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,477 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:55,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:38:55,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,490 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:55,491 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,503 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:38:55,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:55,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:38:55,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,529 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:38:55,530 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,554 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:55,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:38:55,556 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:38:55,575 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,584 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:55,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,603 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:55,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:38:55,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,623 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:55,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:55,625 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,634 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:38:55,635 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,652 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:38:55,653 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,660 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:38:55,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:38:55,661 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:55,775 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-13 20:38:55,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:55,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:55,798 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-07-13 20:38:55,992 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 20:38:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:56,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045145556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:56,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:56,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:38:56,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286942985] [2021-07-13 20:38:56,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:56,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:56,112 INFO L87 Difference]: Start difference. First operand 1451 states and 4842 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:56,680 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-07-13 20:38:57,137 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-07-13 20:38:57,410 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-13 20:38:57,720 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2021-07-13 20:38:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:58,627 INFO L93 Difference]: Finished difference Result 2000 states and 6458 transitions. [2021-07-13 20:38:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:38:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:58,631 INFO L225 Difference]: With dead ends: 2000 [2021-07-13 20:38:58,631 INFO L226 Difference]: Without dead ends: 1985 [2021-07-13 20:38:58,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2548.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:38:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-07-13 20:38:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1452. [2021-07-13 20:38:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.3418332184700206) internal successors, (4849), 1451 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4849 transitions. [2021-07-13 20:38:58,650 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4849 transitions. Word has length 26 [2021-07-13 20:38:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:58,650 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4849 transitions. [2021-07-13 20:38:58,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4849 transitions. [2021-07-13 20:38:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:58,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:58,653 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:58,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:58,857 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 16 times [2021-07-13 20:38:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:58,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147869114] [2021-07-13 20:38:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:59,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147869114] [2021-07-13 20:38:59,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147869114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345492509] [2021-07-13 20:38:59,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:38:59,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:38:59,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:59,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:38:59,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,512 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:59,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,526 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:59,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:38:59,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:38:59,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:59,554 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,564 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:59,565 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,574 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:59,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:38:59,601 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,616 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:38:59,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,630 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:59,631 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:38:59,647 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:38:59,662 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,671 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:38:59,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:59,679 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:59,749 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:38:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345492509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:59,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:59,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:38:59,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884139867] [2021-07-13 20:38:59,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:59,946 INFO L87 Difference]: Start difference. First operand 1452 states and 4849 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:00,681 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-07-13 20:39:01,210 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2021-07-13 20:39:01,369 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 20:39:01,556 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-13 20:39:01,748 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-07-13 20:39:01,969 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-07-13 20:39:02,193 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 20:39:02,524 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 20:39:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:02,714 INFO L93 Difference]: Finished difference Result 2355 states and 7541 transitions. [2021-07-13 20:39:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:39:02,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:02,719 INFO L225 Difference]: With dead ends: 2355 [2021-07-13 20:39:02,719 INFO L226 Difference]: Without dead ends: 2325 [2021-07-13 20:39:02,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2907.0ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:39:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-07-13 20:39:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1465. [2021-07-13 20:39:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-07-13 20:39:02,742 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-07-13 20:39:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:02,742 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-07-13 20:39:02,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-07-13 20:39:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:02,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:02,744 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:02,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:02,954 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-13 20:39:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:02,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612013806] [2021-07-13 20:39:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:03,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:03,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612013806] [2021-07-13 20:39:03,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612013806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:03,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7137716] [2021-07-13 20:39:03,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:39:03,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:03,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:03,597 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:39:03,822 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_46], 2=[A, v_prenex_45]} [2021-07-13 20:39:03,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:03,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,937 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:39:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:03,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:03,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:03,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:03,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:03,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:03,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:03,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:04,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:04,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:04,028 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:39:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:04,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7137716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:04,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:04,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:04,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853927647] [2021-07-13 20:39:04,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:04,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:04,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:04,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:04,082 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:05,062 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-13 20:39:05,380 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:39:05,736 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-07-13 20:39:05,924 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-07-13 20:39:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:06,094 INFO L93 Difference]: Finished difference Result 2028 states and 6589 transitions. [2021-07-13 20:39:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:39:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:06,098 INFO L225 Difference]: With dead ends: 2028 [2021-07-13 20:39:06,098 INFO L226 Difference]: Without dead ends: 1998 [2021-07-13 20:39:06,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2285.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:39:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-07-13 20:39:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1468. [2021-07-13 20:39:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3503749147920927) internal successors, (4915), 1467 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4915 transitions. [2021-07-13 20:39:06,119 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4915 transitions. Word has length 26 [2021-07-13 20:39:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:06,119 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4915 transitions. [2021-07-13 20:39:06,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4915 transitions. [2021-07-13 20:39:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:06,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:06,121 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:06,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:06,334 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-13 20:39:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:06,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068499323] [2021-07-13 20:39:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:06,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068499323] [2021-07-13 20:39:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068499323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964811180] [2021-07-13 20:39:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:39:06,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:06,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:06,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:06,986 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:39:07,131 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_54, v_prenex_64, v_prenex_58], 6=[A, v_prenex_60, v_prenex_62, v_prenex_56, v_prenex_66]} [2021-07-13 20:39:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:07,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,466 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-07-13 20:39:07,467 INFO L628 ElimStorePlain]: treesize reduction 272, result has 55.1 percent of original size [2021-07-13 20:39:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:07,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,597 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:39:07,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:07,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,728 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:39:07,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,740 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:39:07,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,845 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:39:07,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:39:07,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,965 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:39:07,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,977 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:07,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:39:07,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:08,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:08,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:08,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:39:08,090 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:08,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:08,192 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:39:08,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:08,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:08,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:08,286 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:621, output treesize:217 [2021-07-13 20:39:08,454 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:39:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964811180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:08,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994812226] [2021-07-13 20:39:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:08,547 INFO L87 Difference]: Start difference. First operand 1468 states and 4915 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:09,136 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-07-13 20:39:09,661 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:39:10,130 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:39:10,471 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:39:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:10,682 INFO L93 Difference]: Finished difference Result 1972 states and 6440 transitions. [2021-07-13 20:39:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:10,685 INFO L225 Difference]: With dead ends: 1972 [2021-07-13 20:39:10,685 INFO L226 Difference]: Without dead ends: 1957 [2021-07-13 20:39:10,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2531.9ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:39:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-07-13 20:39:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1465. [2021-07-13 20:39:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-07-13 20:39:10,707 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-07-13 20:39:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:10,707 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-07-13 20:39:10,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-07-13 20:39:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:10,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:10,710 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:10,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:10,921 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-13 20:39:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:10,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563838638] [2021-07-13 20:39:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:11,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:11,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563838638] [2021-07-13 20:39:11,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563838638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180972636] [2021-07-13 20:39:11,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:39:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:11,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:11,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:11,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:11,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:11,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:11,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:11,739 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,745 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:39:11,756 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:11,762 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:11,768 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,774 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:11,779 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,848 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:11,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:11,850 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:11,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180972636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:11,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:11,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181432277] [2021-07-13 20:39:11,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:11,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:11,898 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:12,787 INFO L93 Difference]: Finished difference Result 1916 states and 6261 transitions. [2021-07-13 20:39:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:39:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:12,791 INFO L225 Difference]: With dead ends: 1916 [2021-07-13 20:39:12,791 INFO L226 Difference]: Without dead ends: 1895 [2021-07-13 20:39:12,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1072.2ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-07-13 20:39:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1506. [2021-07-13 20:39:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.345514950166113) internal successors, (5035), 1505 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5035 transitions. [2021-07-13 20:39:12,811 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5035 transitions. Word has length 26 [2021-07-13 20:39:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:12,811 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5035 transitions. [2021-07-13 20:39:12,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5035 transitions. [2021-07-13 20:39:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:12,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:12,813 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:13,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-07-13 20:39:13,014 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:13,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-13 20:39:13,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:13,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248785580] [2021-07-13 20:39:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:13,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248785580] [2021-07-13 20:39:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248785580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:13,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335229923] [2021-07-13 20:39:13,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:39:13,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:13,997 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:39:13,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:39:14,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:39:14,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,464 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-07-13 20:39:14,464 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.3 percent of original size [2021-07-13 20:39:14,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-07-13 20:39:14,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,513 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:14,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:39:14,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,648 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:39:14,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,673 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:14,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:39:14,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,697 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:14,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:39:14,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,831 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:39:14,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,853 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:14,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:39:14,855 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,878 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:39:14,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-07-13 20:39:14,880 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,009 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:39:15,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:15,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:15,049 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:746 [2021-07-13 20:39:15,475 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-13 20:39:15,745 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 20:39:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:15,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335229923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:15,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:15,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:39:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523984547] [2021-07-13 20:39:15,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:15,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:15,867 INFO L87 Difference]: Start difference. First operand 1506 states and 5035 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:16,033 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-07-13 20:39:16,179 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 27 [2021-07-13 20:39:16,518 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2021-07-13 20:39:16,814 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 51 [2021-07-13 20:39:17,162 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2021-07-13 20:39:17,466 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2021-07-13 20:39:17,676 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:39:18,252 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-13 20:39:18,393 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-13 20:39:18,792 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 53 [2021-07-13 20:39:19,063 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:39:19,517 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-07-13 20:39:19,961 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 20:39:20,435 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2021-07-13 20:39:20,822 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:39:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:20,870 INFO L93 Difference]: Finished difference Result 2133 states and 6814 transitions. [2021-07-13 20:39:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:39:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:20,874 INFO L225 Difference]: With dead ends: 2133 [2021-07-13 20:39:20,874 INFO L226 Difference]: Without dead ends: 2108 [2021-07-13 20:39:20,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 5796.6ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:39:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-13 20:39:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1529. [2021-07-13 20:39:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.352094240837696) internal successors, (5122), 1528 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5122 transitions. [2021-07-13 20:39:20,896 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5122 transitions. Word has length 26 [2021-07-13 20:39:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:20,896 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5122 transitions. [2021-07-13 20:39:20,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5122 transitions. [2021-07-13 20:39:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:20,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:20,898 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:21,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-07-13 20:39:21,100 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-13 20:39:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:21,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619993362] [2021-07-13 20:39:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:21,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619993362] [2021-07-13 20:39:21,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619993362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432881073] [2021-07-13 20:39:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:39:21,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:21,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:21,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,844 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:21,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:21,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:21,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:21,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:21,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:21,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,891 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:21,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,902 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:21,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:21,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:21,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:21,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:21,924 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:21,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:21,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,944 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:21,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,955 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:21,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:21,957 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:21,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:21,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:21,977 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,985 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:21,985 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:21,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:22,001 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:22,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:22,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:22,082 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:39:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:22,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432881073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:22,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:22,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:39:22,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903485497] [2021-07-13 20:39:22,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:22,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:22,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:22,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:22,267 INFO L87 Difference]: Start difference. First operand 1529 states and 5122 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:23,624 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 20:39:23,771 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-07-13 20:39:24,050 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-13 20:39:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:24,102 INFO L93 Difference]: Finished difference Result 2011 states and 6582 transitions. [2021-07-13 20:39:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:24,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:24,105 INFO L225 Difference]: With dead ends: 2011 [2021-07-13 20:39:24,105 INFO L226 Difference]: Without dead ends: 1982 [2021-07-13 20:39:24,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2097.7ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:39:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-07-13 20:39:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1532. [2021-07-13 20:39:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3527106466361856) internal successors, (5133), 1531 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5133 transitions. [2021-07-13 20:39:24,125 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5133 transitions. Word has length 26 [2021-07-13 20:39:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:24,126 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5133 transitions. [2021-07-13 20:39:24,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5133 transitions. [2021-07-13 20:39:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:24,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:24,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:24,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-07-13 20:39:24,333 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-13 20:39:24,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:24,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930023986] [2021-07-13 20:39:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:24,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930023986] [2021-07-13 20:39:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930023986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467562606] [2021-07-13 20:39:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:39:24,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:24,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:25,015 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 20:39:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:25,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:25,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:25,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,189 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-13 20:39:25,189 INFO L628 ElimStorePlain]: treesize reduction 91, result has 58.6 percent of original size [2021-07-13 20:39:25,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:25,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,241 INFO L518 ElimStorePlain]: Eliminatee v_prenex_87 vanished before elimination [2021-07-13 20:39:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:25,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:25,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:25,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:25,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:25,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:25,285 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:272, output treesize:51 [2021-07-13 20:39:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:25,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467562606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:25,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:25,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756666359] [2021-07-13 20:39:25,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:25,341 INFO L87 Difference]: Start difference. First operand 1532 states and 5133 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:25,588 INFO L93 Difference]: Finished difference Result 1607 states and 5324 transitions. [2021-07-13 20:39:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:39:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:25,591 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:39:25,591 INFO L226 Difference]: Without dead ends: 1592 [2021-07-13 20:39:25,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-13 20:39:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1538. [2021-07-13 20:39:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3545868575146387) internal successors, (5156), 1537 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5156 transitions. [2021-07-13 20:39:25,610 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5156 transitions. Word has length 26 [2021-07-13 20:39:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:25,611 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 5156 transitions. [2021-07-13 20:39:25,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5156 transitions. [2021-07-13 20:39:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:25,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:25,613 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:25,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:25,828 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-13 20:39:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:25,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564395671] [2021-07-13 20:39:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:26,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:26,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564395671] [2021-07-13 20:39:26,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564395671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20056134] [2021-07-13 20:39:26,120 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 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 [2021-07-13 20:39:26,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:26,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:26,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:39:26,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:39:26,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,570 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:26,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:26,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,703 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:39:26,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,725 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:26,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:26,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,745 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:26,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:39:26,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,884 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:39:26,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:26,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,922 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:39:26,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:27,170 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-07-13 20:39:27,170 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-07-13 20:39:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:27,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:39:27,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:27,205 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:27,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:27,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:27,428 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-13 20:39:27,429 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-13 20:39:27,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:27,445 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-13 20:39:27,620 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:39:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20056134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:27,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:27,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280074328] [2021-07-13 20:39:27,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:27,713 INFO L87 Difference]: Start difference. First operand 1538 states and 5156 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:27,851 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 28 [2021-07-13 20:39:28,541 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-13 20:39:29,161 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-07-13 20:39:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:29,204 INFO L93 Difference]: Finished difference Result 2227 states and 7222 transitions. [2021-07-13 20:39:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:29,208 INFO L225 Difference]: With dead ends: 2227 [2021-07-13 20:39:29,208 INFO L226 Difference]: Without dead ends: 2177 [2021-07-13 20:39:29,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1847.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:39:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-07-13 20:39:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1545. [2021-07-13 20:39:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3588082901554404) internal successors, (5186), 1544 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5186 transitions. [2021-07-13 20:39:29,229 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5186 transitions. Word has length 26 [2021-07-13 20:39:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:29,229 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5186 transitions. [2021-07-13 20:39:29,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5186 transitions. [2021-07-13 20:39:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:29,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:29,231 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:29,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-07-13 20:39:29,432 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-13 20:39:29,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:29,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382725996] [2021-07-13 20:39:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:29,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382725996] [2021-07-13 20:39:29,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382725996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75653502] [2021-07-13 20:39:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:39:29,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:30,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,098 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:30,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:30,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:30,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:30,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:30,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,153 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:30,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,161 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:30,162 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:30,175 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:30,186 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:30,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:30,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,212 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:30,213 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,223 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:30,224 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,233 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:30,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:30,234 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,239 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:30,240 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:30,307 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:39:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:30,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75653502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:30,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002335292] [2021-07-13 20:39:30,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:30,479 INFO L87 Difference]: Start difference. First operand 1545 states and 5186 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:31,113 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-07-13 20:39:31,680 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-07-13 20:39:31,924 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:39:32,142 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:39:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:32,211 INFO L93 Difference]: Finished difference Result 2071 states and 6812 transitions. [2021-07-13 20:39:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:39:32,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:32,216 INFO L225 Difference]: With dead ends: 2071 [2021-07-13 20:39:32,216 INFO L226 Difference]: Without dead ends: 2052 [2021-07-13 20:39:32,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1985.7ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:39:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-13 20:39:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1557. [2021-07-13 20:39:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3618251928020566) internal successors, (5231), 1556 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5231 transitions. [2021-07-13 20:39:32,248 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5231 transitions. Word has length 26 [2021-07-13 20:39:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:32,249 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 5231 transitions. [2021-07-13 20:39:32,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5231 transitions. [2021-07-13 20:39:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:32,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:32,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:32,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-07-13 20:39:32,455 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-07-13 20:39:32,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:32,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879648709] [2021-07-13 20:39:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:32,780 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:39:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:32,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:32,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879648709] [2021-07-13 20:39:32,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879648709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:32,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559058316] [2021-07-13 20:39:32,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:39:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:32,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:33,259 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-13 20:39:33,377 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_98], 3=[A, v_prenex_100], 6=[v_prenex_99]} [2021-07-13 20:39:33,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:33,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:33,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,536 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:39:33,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,550 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:39:33,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:39:33,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,688 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:39:33,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,700 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:33,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:39:33,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:39:33,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,826 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:39:33,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,840 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:33,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:39:33,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:39:33,856 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,963 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:39:33,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:33,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:33,970 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:375, output treesize:228 [2021-07-13 20:39:34,138 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:39:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:34,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559058316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:34,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:34,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:34,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721857819] [2021-07-13 20:39:34,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:34,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:34,231 INFO L87 Difference]: Start difference. First operand 1557 states and 5231 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:34,738 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-07-13 20:39:35,006 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-13 20:39:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:35,459 INFO L93 Difference]: Finished difference Result 2052 states and 6751 transitions. [2021-07-13 20:39:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:39:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:35,463 INFO L225 Difference]: With dead ends: 2052 [2021-07-13 20:39:35,463 INFO L226 Difference]: Without dead ends: 2027 [2021-07-13 20:39:35,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1778.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-07-13 20:39:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1563. [2021-07-13 20:39:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.360435339308579) internal successors, (5249), 1562 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5249 transitions. [2021-07-13 20:39:35,491 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5249 transitions. Word has length 26 [2021-07-13 20:39:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:35,491 INFO L482 AbstractCegarLoop]: Abstraction has 1563 states and 5249 transitions. [2021-07-13 20:39:35,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5249 transitions. [2021-07-13 20:39:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:35,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:35,494 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:35,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-07-13 20:39:35,694 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:35,695 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-13 20:39:35,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:35,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651546596] [2021-07-13 20:39:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:36,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651546596] [2021-07-13 20:39:36,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651546596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942737735] [2021-07-13 20:39:36,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:39:36,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:36,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:36,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:39:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:36,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:39:36,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:39:36,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:39:36,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:39:36,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:39:36,472 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:39:36,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:39:36,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:39:36,495 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:39:36,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:39:36,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:39:36,516 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:39:36,525 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:39:36,532 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:39:36,540 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:39:36,547 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:39:36,552 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,586 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.0 percent of original size [2021-07-13 20:39:36,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:39:36,587 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:809, output treesize:39 [2021-07-13 20:39:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942737735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:36,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:39:36,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194287425] [2021-07-13 20:39:36,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:36,646 INFO L87 Difference]: Start difference. First operand 1563 states and 5249 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:37,636 INFO L93 Difference]: Finished difference Result 2040 states and 6673 transitions. [2021-07-13 20:39:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:39:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:37,640 INFO L225 Difference]: With dead ends: 2040 [2021-07-13 20:39:37,640 INFO L226 Difference]: Without dead ends: 2014 [2021-07-13 20:39:37,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1280.7ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:39:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-07-13 20:39:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1579. [2021-07-13 20:39:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-07-13 20:39:37,661 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-07-13 20:39:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:37,661 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-07-13 20:39:37,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-07-13 20:39:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:37,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:37,663 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:37,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:37,864 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-13 20:39:37,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:37,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546633071] [2021-07-13 20:39:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:38,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:38,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546633071] [2021-07-13 20:39:38,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546633071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:38,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799065429] [2021-07-13 20:39:38,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:39:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:38,633 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_103], 5=[v_prenex_101, v_prenex_105]} [2021-07-13 20:39:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:38,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:38,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:39:38,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:38,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:38,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:39:38,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,731 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-07-13 20:39:38,731 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-07-13 20:39:38,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:38,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:38,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:39:38,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:38,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:38,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:39:38,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:38,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:39:38,790 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-07-13 20:39:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799065429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:38,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:38,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:39:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777805444] [2021-07-13 20:39:38,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:38,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:38,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:38,833 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:41,304 INFO L93 Difference]: Finished difference Result 2239 states and 7310 transitions. [2021-07-13 20:39:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:39:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:41,308 INFO L225 Difference]: With dead ends: 2239 [2021-07-13 20:39:41,308 INFO L226 Difference]: Without dead ends: 2224 [2021-07-13 20:39:41,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2603.9ms TimeCoverageRelationStatistics Valid=512, Invalid=2244, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:39:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-07-13 20:39:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1579. [2021-07-13 20:39:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-07-13 20:39:41,334 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-07-13 20:39:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:41,335 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-07-13 20:39:41,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-07-13 20:39:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:41,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:41,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:41,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-07-13 20:39:41,537 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-07-13 20:39:41,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:41,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150167891] [2021-07-13 20:39:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:41,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150167891] [2021-07-13 20:39:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150167891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676574793] [2021-07-13 20:39:41,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:39:41,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:41,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:42,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,167 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:42,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,176 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:42,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:42,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:42,201 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:42,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:42,220 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,228 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:42,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:42,242 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:42,252 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,260 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:42,261 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:42,269 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,279 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:42,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:42,280 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,290 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:42,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:42,291 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:42,302 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:42,309 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:42,378 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:39:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:42,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676574793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:42,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:42,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044208501] [2021-07-13 20:39:42,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:42,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:42,552 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,014 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-07-13 20:39:44,185 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-07-13 20:39:44,471 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:39:44,679 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:39:44,919 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-13 20:39:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:44,961 INFO L93 Difference]: Finished difference Result 2206 states and 7151 transitions. [2021-07-13 20:39:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:39:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:44,965 INFO L225 Difference]: With dead ends: 2206 [2021-07-13 20:39:44,965 INFO L226 Difference]: Without dead ends: 2187 [2021-07-13 20:39:44,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2556.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:39:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-07-13 20:39:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1585. [2021-07-13 20:39:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-07-13 20:39:44,987 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-07-13 20:39:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:44,987 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-07-13 20:39:44,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-07-13 20:39:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:44,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:44,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:45,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1469,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:45,190 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-13 20:39:45,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:45,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825736192] [2021-07-13 20:39:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:45,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825736192] [2021-07-13 20:39:45,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825736192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335644817] [2021-07-13 20:39:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:39:45,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:39:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:46,013 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 20:39:46,330 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_118, A], 5=[v_prenex_120, v_prenex_116]} [2021-07-13 20:39:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,350 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:46,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:46,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:39:46,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,524 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:39:46,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,547 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:46,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:46,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,567 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:46,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:39:46,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,718 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:39:46,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:46,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:46,738 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:46,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:39:46,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:46,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:39:46,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,890 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:39:46,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:46,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:46,913 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:39:46,914 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:46,932 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:46,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:39:46,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:47,058 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:39:47,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:47,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:47,070 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-07-13 20:39:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:47,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335644817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:47,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:47,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:47,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86588019] [2021-07-13 20:39:47,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:39:47,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:39:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:39:47,216 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:47,857 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-07-13 20:39:49,569 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-07-13 20:39:50,035 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-07-13 20:39:50,194 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-07-13 20:39:50,787 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-07-13 20:39:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:51,180 INFO L93 Difference]: Finished difference Result 2573 states and 8159 transitions. [2021-07-13 20:39:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:39:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:51,185 INFO L225 Difference]: With dead ends: 2573 [2021-07-13 20:39:51,185 INFO L226 Difference]: Without dead ends: 2529 [2021-07-13 20:39:51,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4110.9ms TimeCoverageRelationStatistics Valid=671, Invalid=3361, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:39:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-07-13 20:39:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1585. [2021-07-13 20:39:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-07-13 20:39:51,210 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-07-13 20:39:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:51,210 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-07-13 20:39:51,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-07-13 20:39:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:51,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:51,212 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:51,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-07-13 20:39:51,413 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-13 20:39:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:51,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176325886] [2021-07-13 20:39:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:51,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176325886] [2021-07-13 20:39:51,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176325886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63874258] [2021-07-13 20:39:51,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:39:51,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:51,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:52,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,453 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:39:52,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 33 [2021-07-13 20:39:52,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:39:52,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,512 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:39:52,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 20:39:52,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,538 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:39:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:39:52,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,556 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:39:52,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,573 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:39:52,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,589 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:39:52,590 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,606 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:39:52,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,632 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:39:52,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:39:52,633 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,657 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:39:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:39:52,658 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,674 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-13 20:39:52,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,690 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:39:52,691 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,706 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:39:52,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,722 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:39:52,722 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,737 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:52,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:39:52,737 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,753 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:39:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 25 [2021-07-13 20:39:52,754 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,871 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-07-13 20:39:52,871 INFO L628 ElimStorePlain]: treesize reduction 76, result has 67.7 percent of original size [2021-07-13 20:39:52,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:52,874 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-07-13 20:39:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63874258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:53,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:53,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:39:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582866453] [2021-07-13 20:39:53,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:39:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:39:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:39:53,014 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:54,102 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-13 20:39:54,519 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 20:39:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:55,859 INFO L93 Difference]: Finished difference Result 3102 states and 9804 transitions. [2021-07-13 20:39:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:39:55,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:55,864 INFO L225 Difference]: With dead ends: 3102 [2021-07-13 20:39:55,864 INFO L226 Difference]: Without dead ends: 3072 [2021-07-13 20:39:55,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2922.4ms TimeCoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:39:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-07-13 20:39:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1645. [2021-07-13 20:39:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3619221411192215) internal successors, (5527), 1644 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5527 transitions. [2021-07-13 20:39:55,893 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5527 transitions. Word has length 26 [2021-07-13 20:39:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:55,893 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5527 transitions. [2021-07-13 20:39:55,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5527 transitions. [2021-07-13 20:39:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:55,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:55,895 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:56,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-07-13 20:39:56,096 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-13 20:39:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:56,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453380633] [2021-07-13 20:39:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:56,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:56,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453380633] [2021-07-13 20:39:56,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453380633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:56,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379050787] [2021-07-13 20:39:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:39:56,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:56,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:57,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:39:57,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:39:57,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:39:57,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:39:57,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:39:57,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:39:57,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:57,073 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:39:57,080 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:39:57,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:57,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:39:57,102 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:39:57,110 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:57,117 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:57,124 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:39:57,129 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,157 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:39:57,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:39:57,158 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:39:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379050787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:57,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:57,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:39:57,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555152380] [2021-07-13 20:39:57,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:57,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:57,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:57,181 INFO L87 Difference]: Start difference. First operand 1645 states and 5527 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:59,263 INFO L93 Difference]: Finished difference Result 3253 states and 10418 transitions. [2021-07-13 20:39:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:39:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:59,269 INFO L225 Difference]: With dead ends: 3253 [2021-07-13 20:39:59,269 INFO L226 Difference]: Without dead ends: 3217 [2021-07-13 20:39:59,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2022.4ms TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:39:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-07-13 20:39:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1763. [2021-07-13 20:39:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.388195232690125) internal successors, (5970), 1762 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5970 transitions. [2021-07-13 20:39:59,299 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5970 transitions. Word has length 26 [2021-07-13 20:39:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:59,299 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 5970 transitions. [2021-07-13 20:39:59,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5970 transitions. [2021-07-13 20:39:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:59,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:59,302 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:59,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-07-13 20:39:59,502 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-13 20:39:59,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:59,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926731310] [2021-07-13 20:39:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:59,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:59,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926731310] [2021-07-13 20:39:59,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926731310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:59,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916921412] [2021-07-13 20:39:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:39:59,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:59,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,382 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:00,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-13 20:40:00,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,407 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:40:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:40:00,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,434 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:40:00,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,459 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:00,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:40:00,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,476 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:40:00,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,501 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:40:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:40:00,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,534 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:40:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:40:00,538 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,560 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:40:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:40:00,562 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:00,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:40:00,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,615 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:40:00,619 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,634 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:00,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:40:00,635 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,657 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:40:00,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-07-13 20:40:00,659 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,674 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:00,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:40:00,675 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,689 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:00,690 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,704 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:00,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:40:00,705 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,713 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:00,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:40:00,714 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,815 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-07-13 20:40:00,815 INFO L628 ElimStorePlain]: treesize reduction 136, result has 44.3 percent of original size [2021-07-13 20:40:00,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:40:00,817 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-07-13 20:40:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:00,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916921412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:00,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:00,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:40:00,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411339511] [2021-07-13 20:40:00,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:00,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:00,903 INFO L87 Difference]: Start difference. First operand 1763 states and 5970 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:02,558 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-13 20:40:02,785 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-07-13 20:40:03,014 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-13 20:40:03,545 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-07-13 20:40:03,771 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-07-13 20:40:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:04,014 INFO L93 Difference]: Finished difference Result 3738 states and 11851 transitions. [2021-07-13 20:40:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:40:04,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:04,021 INFO L225 Difference]: With dead ends: 3738 [2021-07-13 20:40:04,021 INFO L226 Difference]: Without dead ends: 3681 [2021-07-13 20:40:04,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3032.9ms TimeCoverageRelationStatistics Valid=639, Invalid=2553, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:40:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-07-13 20:40:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 1801. [2021-07-13 20:40:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.397777777777778) internal successors, (6116), 1800 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6116 transitions. [2021-07-13 20:40:04,058 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6116 transitions. Word has length 26 [2021-07-13 20:40:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:04,058 INFO L482 AbstractCegarLoop]: Abstraction has 1801 states and 6116 transitions. [2021-07-13 20:40:04,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6116 transitions. [2021-07-13 20:40:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:04,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:04,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:04,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:04,276 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-07-13 20:40:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341513130] [2021-07-13 20:40:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:04,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341513130] [2021-07-13 20:40:04,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341513130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101378644] [2021-07-13 20:40:04,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:40:04,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:40:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:05,290 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:40:05,517 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:40:05,670 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:05,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:40:05,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:05,816 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:40:05,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:05,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:05,967 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:40:05,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,987 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:40:05,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,130 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:40:06,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,149 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:06,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:40:06,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,279 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:40:06,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:40:06,299 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,422 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:40:06,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:06,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,561 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:40:06,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,580 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:06,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:40:06,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,700 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:40:06,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,716 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:06,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:06,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,843 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:40:06,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:06,858 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-07-13 20:40:07,073 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-13 20:40:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:07,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101378644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:07,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:07,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:40:07,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758133045] [2021-07-13 20:40:07,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:07,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:07,194 INFO L87 Difference]: Start difference. First operand 1801 states and 6116 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:08,161 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-13 20:40:08,366 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-07-13 20:40:08,838 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:40:09,066 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:40:09,302 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-13 20:40:09,788 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-13 20:40:10,178 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2021-07-13 20:40:10,748 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 67 [2021-07-13 20:40:11,196 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-07-13 20:40:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:11,396 INFO L93 Difference]: Finished difference Result 2391 states and 7895 transitions. [2021-07-13 20:40:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:40:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:11,401 INFO L225 Difference]: With dead ends: 2391 [2021-07-13 20:40:11,401 INFO L226 Difference]: Without dead ends: 2361 [2021-07-13 20:40:11,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4566.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:40:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-07-13 20:40:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1809. [2021-07-13 20:40:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.396017699115044) internal successors, (6140), 1808 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6140 transitions. [2021-07-13 20:40:11,428 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6140 transitions. Word has length 26 [2021-07-13 20:40:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:11,428 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 6140 transitions. [2021-07-13 20:40:11,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6140 transitions. [2021-07-13 20:40:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:11,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:11,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:11,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1867 [2021-07-13 20:40:11,631 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:11,631 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-07-13 20:40:11,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:11,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005082008] [2021-07-13 20:40:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:11,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:11,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005082008] [2021-07-13 20:40:11,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005082008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:11,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848231376] [2021-07-13 20:40:11,947 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:40:11,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:40:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:12,323 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:40:12,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:12,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,492 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:40:12,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:12,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:40:12,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,616 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:40:12,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:40:12,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:12,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,845 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:12,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:40:12,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:13,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:13,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:13,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:13,060 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:13,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:13,168 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:13,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:13,169 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:13,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:13,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:13,258 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:40:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:13,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848231376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:13,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:13,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:13,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500214902] [2021-07-13 20:40:13,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:13,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:13,450 INFO L87 Difference]: Start difference. First operand 1809 states and 6140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:13,757 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-13 20:40:14,239 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-13 20:40:14,773 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-13 20:40:15,029 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:40:15,490 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:40:15,691 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-13 20:40:15,938 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:40:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:16,034 INFO L93 Difference]: Finished difference Result 2637 states and 8679 transitions. [2021-07-13 20:40:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:40:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:16,039 INFO L225 Difference]: With dead ends: 2637 [2021-07-13 20:40:16,039 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 20:40:16,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2794.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:40:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 20:40:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1822. [2021-07-13 20:40:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-07-13 20:40:16,068 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-07-13 20:40:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:16,068 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-07-13 20:40:16,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-07-13 20:40:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:16,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:16,071 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:16,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:16,271 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-07-13 20:40:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:16,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470859774] [2021-07-13 20:40:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:16,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:16,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470859774] [2021-07-13 20:40:16,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470859774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:16,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699756897] [2021-07-13 20:40:16,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:40:16,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:16,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:17,042 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_156, v_prenex_158], 6=[v_prenex_157]} [2021-07-13 20:40:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,064 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:40:17,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,087 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:17,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:40:17,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,236 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:40:17,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:40:17,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,275 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:40:17,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,427 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:40:17,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:17,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,467 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:40:17,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,750 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-07-13 20:40:17,750 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-07-13 20:40:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:17,770 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:17,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:17,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:40:17,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:18,031 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:40:18,031 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-07-13 20:40:18,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:18,050 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:323 [2021-07-13 20:40:18,246 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-13 20:40:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:18,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699756897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:18,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:18,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982409292] [2021-07-13 20:40:18,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:18,346 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:18,536 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 27 [2021-07-13 20:40:19,308 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-07-13 20:40:20,429 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-07-13 20:40:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:20,473 INFO L93 Difference]: Finished difference Result 2416 states and 8045 transitions. [2021-07-13 20:40:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:40:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:20,478 INFO L225 Difference]: With dead ends: 2416 [2021-07-13 20:40:20,478 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 20:40:20,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2348.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:40:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 20:40:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1822. [2021-07-13 20:40:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-07-13 20:40:20,506 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-07-13 20:40:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:20,506 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-07-13 20:40:20,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-07-13 20:40:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:20,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:20,509 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:20,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1910,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:20,717 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-13 20:40:20,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:20,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611790529] [2021-07-13 20:40:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:21,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:21,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611790529] [2021-07-13 20:40:21,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611790529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:21,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275980478] [2021-07-13 20:40:21,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:40:21,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:21,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:21,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:40:21,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:40:21,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:40:21,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:40:21,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:40:21,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:40:21,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:40:21,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:40:21,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:40:21,776 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:40:21,785 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:40:21,793 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:21,802 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:40:21,813 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:21,823 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:21,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:40:21,840 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,891 INFO L628 ElimStorePlain]: treesize reduction 223, result has 12.9 percent of original size [2021-07-13 20:40:21,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:21,892 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-07-13 20:40:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:21,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275980478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:21,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:21,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:40:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980907926] [2021-07-13 20:40:21,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:21,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:21,921 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:22,417 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-07-13 20:40:23,505 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-13 20:40:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:23,561 INFO L93 Difference]: Finished difference Result 2280 states and 7549 transitions. [2021-07-13 20:40:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:40:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:23,565 INFO L225 Difference]: With dead ends: 2280 [2021-07-13 20:40:23,565 INFO L226 Difference]: Without dead ends: 2258 [2021-07-13 20:40:23,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1920.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:40:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-07-13 20:40:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1818. [2021-07-13 20:40:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-07-13 20:40:23,588 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-07-13 20:40:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:23,588 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-07-13 20:40:23,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-07-13 20:40:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:23,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:23,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:23,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1966 [2021-07-13 20:40:23,791 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-13 20:40:23,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:23,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241875406] [2021-07-13 20:40:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:24,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:24,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241875406] [2021-07-13 20:40:24,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241875406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:24,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444217059] [2021-07-13 20:40:24,264 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 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 [2021-07-13 20:40:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:24,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:24,594 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_161], 5=[v_prenex_163, v_prenex_159]} [2021-07-13 20:40:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:24,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:24,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:40:24,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:24,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:24,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:24,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:24,686 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-07-13 20:40:24,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_161 vanished before elimination [2021-07-13 20:40:24,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:40:24,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:24,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:24,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:24,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:24,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:24,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:24,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:40:24,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:24,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:24,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:40:24,747 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:43 [2021-07-13 20:40:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:24,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444217059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:24,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:24,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:40:24,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731326084] [2021-07-13 20:40:24,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:24,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:24,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:24,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:24,823 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:25,361 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-07-13 20:40:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:26,623 INFO L93 Difference]: Finished difference Result 2473 states and 8184 transitions. [2021-07-13 20:40:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:40:26,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:26,627 INFO L225 Difference]: With dead ends: 2473 [2021-07-13 20:40:26,627 INFO L226 Difference]: Without dead ends: 2458 [2021-07-13 20:40:26,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2084.7ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:40:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-07-13 20:40:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1818. [2021-07-13 20:40:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-07-13 20:40:26,652 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-07-13 20:40:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:26,652 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-07-13 20:40:26,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-07-13 20:40:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:26,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:26,654 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:26,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-07-13 20:40:26,861 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-13 20:40:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:26,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666635940] [2021-07-13 20:40:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:27,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666635940] [2021-07-13 20:40:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666635940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999362021] [2021-07-13 20:40:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:40:27,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:27,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:40:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:27,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,829 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:27,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:40:27,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,873 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-07-13 20:40:27,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-07-13 20:40:27,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,916 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:40:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-07-13 20:40:27,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,966 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-07-13 20:40:27,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,015 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:40:28,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-07-13 20:40:28,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,059 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:40:28,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-13 20:40:28,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,111 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:28,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:40:28,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,167 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:40:28,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:40:28,171 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:28,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:40:28,230 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,285 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:28,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:40:28,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:28,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-07-13 20:40:28,340 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,361 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:28,361 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,403 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:40:28,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-13 20:40:28,412 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,442 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:28,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:28,443 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,483 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-07-13 20:40:28,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-07-13 20:40:28,485 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,498 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:28,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:40:28,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,951 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-13 20:40:28,952 INFO L628 ElimStorePlain]: treesize reduction 411, result has 45.1 percent of original size [2021-07-13 20:40:28,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:28,959 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:389 [2021-07-13 20:40:29,233 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-07-13 20:40:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:29,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999362021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:29,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:29,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:40:29,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472896470] [2021-07-13 20:40:29,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:40:29,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:40:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:40:29,333 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:30,001 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-07-13 20:40:30,511 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-13 20:40:30,971 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-13 20:40:31,199 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-13 20:40:31,484 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:40:32,063 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-07-13 20:40:32,612 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:40:32,924 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-13 20:40:33,133 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:40:33,355 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-13 20:40:33,539 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-13 20:40:34,228 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-13 20:40:34,475 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:40:34,945 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-07-13 20:40:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:35,634 INFO L93 Difference]: Finished difference Result 3328 states and 10546 transitions. [2021-07-13 20:40:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:40:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:35,650 INFO L225 Difference]: With dead ends: 3328 [2021-07-13 20:40:35,650 INFO L226 Difference]: Without dead ends: 3272 [2021-07-13 20:40:35,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 6229.3ms TimeCoverageRelationStatistics Valid=856, Invalid=4400, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:40:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-07-13 20:40:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 1831. [2021-07-13 20:40:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.40327868852459) internal successors, (6228), 1830 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6228 transitions. [2021-07-13 20:40:35,682 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6228 transitions. Word has length 26 [2021-07-13 20:40:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6228 transitions. [2021-07-13 20:40:35,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6228 transitions. [2021-07-13 20:40:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:35,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:35,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:35,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:35,888 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-07-13 20:40:35,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:35,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268237756] [2021-07-13 20:40:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:36,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:36,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268237756] [2021-07-13 20:40:36,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268237756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:36,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317318551] [2021-07-13 20:40:36,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:40:36,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:40:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:40:36,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,016 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:40:37,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,073 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:40:37,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,117 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-07-13 20:40:37,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 36 [2021-07-13 20:40:37,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,172 INFO L354 Elim1Store]: treesize reduction 4, result has 91.1 percent of original size [2021-07-13 20:40:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-07-13 20:40:37,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,202 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:37,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:37,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:37,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:40:37,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,319 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:40:37,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-13 20:40:37,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,371 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:40:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:40:37,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,422 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-13 20:40:37,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-07-13 20:40:37,425 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,468 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:40:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-13 20:40:37,472 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,492 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:40:37,493 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,525 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-07-13 20:40:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 29 [2021-07-13 20:40:37,527 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,546 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:40:37,547 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,566 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:37,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:40:37,567 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,609 INFO L354 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2021-07-13 20:40:37,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 48 [2021-07-13 20:40:37,611 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:37,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:37,623 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:40:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:37,623 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:38,107 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-13 20:40:38,107 INFO L628 ElimStorePlain]: treesize reduction 174, result has 69.4 percent of original size [2021-07-13 20:40:38,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-13 20:40:38,114 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:461 [2021-07-13 20:40:38,394 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-13 20:40:38,669 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:40:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:38,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317318551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:38,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:38,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:40:38,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985519277] [2021-07-13 20:40:38,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:40:38,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:40:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:40:38,800 INFO L87 Difference]: Start difference. First operand 1831 states and 6228 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:39,575 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-07-13 20:40:39,774 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 20:40:40,709 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-07-13 20:40:41,080 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-13 20:40:41,204 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 20:40:41,363 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-13 20:40:41,497 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 20:40:41,664 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:40:42,084 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:40:42,543 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-13 20:40:42,834 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 20:40:43,133 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:40:43,476 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2021-07-13 20:40:43,952 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-07-13 20:40:44,125 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2021-07-13 20:40:44,814 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-07-13 20:40:45,202 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:40:45,555 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:40:46,004 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:40:46,290 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-07-13 20:40:46,775 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-07-13 20:40:47,066 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2021-07-13 20:40:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:47,194 INFO L93 Difference]: Finished difference Result 3152 states and 10146 transitions. [2021-07-13 20:40:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:40:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:47,199 INFO L225 Difference]: With dead ends: 3152 [2021-07-13 20:40:47,200 INFO L226 Difference]: Without dead ends: 3089 [2021-07-13 20:40:47,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 8669.0ms TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:40:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-07-13 20:40:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1811. [2021-07-13 20:40:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.4027624309392266) internal successors, (6159), 1810 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6159 transitions. [2021-07-13 20:40:47,231 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6159 transitions. Word has length 26 [2021-07-13 20:40:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:47,231 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6159 transitions. [2021-07-13 20:40:47,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6159 transitions. [2021-07-13 20:40:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:47,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:47,234 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:47,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2244 [2021-07-13 20:40:47,434 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-07-13 20:40:47,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:47,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814507198] [2021-07-13 20:40:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:47,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814507198] [2021-07-13 20:40:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814507198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988542912] [2021-07-13 20:40:47,812 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 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 [2021-07-13 20:40:47,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:47,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:47,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:48,454 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-07-13 20:40:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:48,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:48,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:48,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:40:48,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:48,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:48,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:48,714 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:40:48,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:40:48,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:48,991 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-07-13 20:40:48,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,029 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:40:49,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-07-13 20:40:49,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,063 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:40:49,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2021-07-13 20:40:49,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,322 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-13 20:40:49,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,353 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:40:49,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:49,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,381 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:40:49,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:40:49,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,829 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2021-07-13 20:40:49,830 INFO L628 ElimStorePlain]: treesize reduction 38, result has 92.7 percent of original size [2021-07-13 20:40:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:49,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:40:49,863 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,893 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:40:49,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 39 [2021-07-13 20:40:49,904 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,312 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2021-07-13 20:40:50,312 INFO L628 ElimStorePlain]: treesize reduction 47, result has 90.4 percent of original size [2021-07-13 20:40:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:40:50,357 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,384 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:40:50,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-07-13 20:40:50,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,568 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:40:50,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,602 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:40:50,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:40:50,606 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,626 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-07-13 20:40:50,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:40:50,627 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,767 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:40:50,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:40:50,780 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:621, output treesize:257 [2021-07-13 20:40:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:50,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988542912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:50,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:50,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:40:50,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560478566] [2021-07-13 20:40:50,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:40:50,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:50,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:40:50,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:50,932 INFO L87 Difference]: Start difference. First operand 1811 states and 6159 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:51,253 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-07-13 20:40:52,103 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:40:52,925 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-07-13 20:40:53,051 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-07-13 20:40:53,420 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-07-13 20:40:53,913 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-07-13 20:40:54,037 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-13 20:40:54,275 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-07-13 20:40:54,423 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-13 20:40:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:54,845 INFO L93 Difference]: Finished difference Result 3034 states and 9904 transitions. [2021-07-13 20:40:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:40:54,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:54,850 INFO L225 Difference]: With dead ends: 3034 [2021-07-13 20:40:54,850 INFO L226 Difference]: Without dead ends: 2983 [2021-07-13 20:40:54,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 4066.3ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:40:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-07-13 20:40:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1871. [2021-07-13 20:40:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.411229946524064) internal successors, (6379), 1870 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6379 transitions. [2021-07-13 20:40:54,884 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6379 transitions. Word has length 26 [2021-07-13 20:40:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:54,884 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6379 transitions. [2021-07-13 20:40:54,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6379 transitions. [2021-07-13 20:40:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:54,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:54,886 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:55,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2411 [2021-07-13 20:40:55,087 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash 227092556, now seen corresponding path program 53 times [2021-07-13 20:40:55,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:55,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905556155] [2021-07-13 20:40:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:55,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:55,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905556155] [2021-07-13 20:40:55,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905556155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:55,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856040825] [2021-07-13 20:40:55,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:40:55,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:40:55,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:55,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:40:55,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:40:55,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:40:55,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:40:55,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:40:55,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:55,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:40:55,914 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:40:55,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:40:55,929 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:40:55,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:55,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:40:55,952 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:40:55,959 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:40:55,966 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:40:55,973 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:55,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:40:55,978 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:56,008 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-07-13 20:40:56,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:56,008 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-13 20:40:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:56,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856040825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:56,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:56,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:40:56,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394317607] [2021-07-13 20:40:56,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:56,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:56,042 INFO L87 Difference]: Start difference. First operand 1871 states and 6379 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:57,417 INFO L93 Difference]: Finished difference Result 2487 states and 8126 transitions. [2021-07-13 20:40:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:40:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:57,421 INFO L225 Difference]: With dead ends: 2487 [2021-07-13 20:40:57,421 INFO L226 Difference]: Without dead ends: 2449 [2021-07-13 20:40:57,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1512.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:40:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-07-13 20:40:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1871. [2021-07-13 20:40:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.409090909090909) internal successors, (6375), 1870 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6375 transitions. [2021-07-13 20:40:57,447 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6375 transitions. Word has length 26 [2021-07-13 20:40:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:57,447 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6375 transitions. [2021-07-13 20:40:57,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6375 transitions. [2021-07-13 20:40:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:57,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:57,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:57,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2496 [2021-07-13 20:40:57,651 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 54 times [2021-07-13 20:40:57,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:57,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428105169] [2021-07-13 20:40:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:58,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:58,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428105169] [2021-07-13 20:40:58,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428105169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:58,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725427539] [2021-07-13 20:40:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:40:58,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:58,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,261 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:40:58,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-13 20:40:58,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,291 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-07-13 20:40:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-07-13 20:40:58,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,330 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:40:58,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:40:58,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,349 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:40:58,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:58,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,371 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:40:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-13 20:40:58,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,395 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:40:58,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-13 20:40:58,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,411 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:40:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:40:58,412 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,434 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-13 20:40:58,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-07-13 20:40:58,435 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,450 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:40:58,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:40:58,451 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,466 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:40:58,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:58,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,488 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-13 20:40:58,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:40:58,490 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,505 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:40:58,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:58,506 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,527 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:40:58,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:40:58,529 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:58,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 20:40:58,566 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,587 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:40:58,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-13 20:40:58,589 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,597 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:40:58,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:58,598 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,683 INFO L628 ElimStorePlain]: treesize reduction 125, result has 42.7 percent of original size [2021-07-13 20:40:58,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:40:58,685 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:93 [2021-07-13 20:40:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:58,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725427539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:58,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:58,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:40:58,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51105997] [2021-07-13 20:40:58,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:58,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:58,777 INFO L87 Difference]: Start difference. First operand 1871 states and 6375 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:59,207 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-13 20:40:59,616 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-07-13 20:40:59,999 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-13 20:41:00,392 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-07-13 20:41:01,039 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:41:01,337 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-07-13 20:41:01,505 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-07-13 20:41:01,792 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-13 20:41:01,962 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-07-13 20:41:02,163 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-07-13 20:41:02,397 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-07-13 20:41:02,646 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-13 20:41:02,856 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-07-13 20:41:03,118 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-07-13 20:41:03,422 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2021-07-13 20:41:03,703 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-07-13 20:41:04,029 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-13 20:41:04,214 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-07-13 20:41:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:04,403 INFO L93 Difference]: Finished difference Result 3107 states and 9967 transitions. [2021-07-13 20:41:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:41:04,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:04,409 INFO L225 Difference]: With dead ends: 3107 [2021-07-13 20:41:04,409 INFO L226 Difference]: Without dead ends: 3069 [2021-07-13 20:41:04,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 5423.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2913, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:41:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-07-13 20:41:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1881. [2021-07-13 20:41:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.4159574468085108) internal successors, (6422), 1880 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6422 transitions. [2021-07-13 20:41:04,440 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6422 transitions. Word has length 26 [2021-07-13 20:41:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:04,440 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 6422 transitions. [2021-07-13 20:41:04,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6422 transitions. [2021-07-13 20:41:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:04,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:04,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:04,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2592,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:04,644 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-07-13 20:41:04,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:04,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909713516] [2021-07-13 20:41:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:04,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:04,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909713516] [2021-07-13 20:41:04,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909713516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165414341] [2021-07-13 20:41:04,949 INFO L93 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 [2021-07-13 20:41:04,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:05,356 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:41:05,538 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:41:05,585 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_191, v_prenex_189], 2=[v_prenex_190, A]} [2021-07-13 20:41:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:05,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:05,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,724 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:41:05,724 INFO L628 ElimStorePlain]: treesize reduction 118, result has 55.1 percent of original size [2021-07-13 20:41:05,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:41:05,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:05,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:05,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:05,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:05,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:05,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:05,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:05,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:05,877 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:51 [2021-07-13 20:41:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:05,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165414341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:05,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:05,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:41:05,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261699684] [2021-07-13 20:41:05,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:05,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:05,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:05,934 INFO L87 Difference]: Start difference. First operand 1881 states and 6422 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:06,636 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:41:07,124 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:41:07,347 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-13 20:41:07,577 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-13 20:41:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:07,695 INFO L93 Difference]: Finished difference Result 2308 states and 7739 transitions. [2021-07-13 20:41:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:41:07,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:07,699 INFO L225 Difference]: With dead ends: 2308 [2021-07-13 20:41:07,699 INFO L226 Difference]: Without dead ends: 2293 [2021-07-13 20:41:07,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2059.6ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:41:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-07-13 20:41:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1873. [2021-07-13 20:41:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.419337606837607) internal successors, (6401), 1872 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6401 transitions. [2021-07-13 20:41:07,724 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6401 transitions. Word has length 26 [2021-07-13 20:41:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:07,724 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 6401 transitions. [2021-07-13 20:41:07,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6401 transitions. [2021-07-13 20:41:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:07,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:07,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:07,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2617 [2021-07-13 20:41:07,933 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-07-13 20:41:07,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:07,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228577136] [2021-07-13 20:41:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:08,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:08,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228577136] [2021-07-13 20:41:08,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228577136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:08,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208257742] [2021-07-13 20:41:08,231 INFO 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 [2021-07-13 20:41:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:08,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:08,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:08,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:08,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:08,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:41:08,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:08,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:08,581 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:08,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:08,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:08,596 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:08,601 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:08,606 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:08,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:08,616 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:08,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:08,620 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,691 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:41:08,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:08,693 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:41:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208257742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:08,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:08,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:08,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195908099] [2021-07-13 20:41:08,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:08,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:08,747 INFO L87 Difference]: Start difference. First operand 1873 states and 6401 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:09,162 INFO L93 Difference]: Finished difference Result 2211 states and 7445 transitions. [2021-07-13 20:41:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:41:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:09,166 INFO L225 Difference]: With dead ends: 2211 [2021-07-13 20:41:09,166 INFO L226 Difference]: Without dead ends: 2196 [2021-07-13 20:41:09,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-07-13 20:41:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1867. [2021-07-13 20:41:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4190782422293675) internal successors, (6380), 1866 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6380 transitions. [2021-07-13 20:41:09,190 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6380 transitions. Word has length 26 [2021-07-13 20:41:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:09,190 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6380 transitions. [2021-07-13 20:41:09,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6380 transitions. [2021-07-13 20:41:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:09,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:09,192 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:09,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2630 [2021-07-13 20:41:09,404 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-07-13 20:41:09,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:09,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745811955] [2021-07-13 20:41:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:09,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:09,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745811955] [2021-07-13 20:41:09,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745811955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:09,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16805566] [2021-07-13 20:41:09,731 INFO L93 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 [2021-07-13 20:41:09,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:09,998 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:09,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:09,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:10,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:10,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:10,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,036 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:10,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,045 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:10,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,053 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:10,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:10,068 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,076 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:41:10,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:10,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:10,101 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,109 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:10,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:10,129 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:10,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:10,148 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,157 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:10,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:10,159 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:10,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:10,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:10,246 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-07-13 20:41:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:10,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16805566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:10,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:10,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:41:10,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197541937] [2021-07-13 20:41:10,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:10,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:10,416 INFO L87 Difference]: Start difference. First operand 1867 states and 6380 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:10,918 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:41:11,465 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-07-13 20:41:11,823 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-07-13 20:41:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:11,968 INFO L93 Difference]: Finished difference Result 2784 states and 9269 transitions. [2021-07-13 20:41:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:41:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:11,973 INFO L225 Difference]: With dead ends: 2784 [2021-07-13 20:41:11,973 INFO L226 Difference]: Without dead ends: 2769 [2021-07-13 20:41:11,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1764.3ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:41:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-07-13 20:41:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1864. [2021-07-13 20:41:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.416532474503489) internal successors, (6365), 1863 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6365 transitions. [2021-07-13 20:41:12,003 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6365 transitions. Word has length 26 [2021-07-13 20:41:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:12,003 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 6365 transitions. [2021-07-13 20:41:12,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6365 transitions. [2021-07-13 20:41:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:12,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:12,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:12,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2658 [2021-07-13 20:41:12,209 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:12,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 33 times [2021-07-13 20:41:12,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:12,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026157483] [2021-07-13 20:41:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:12,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:12,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026157483] [2021-07-13 20:41:12,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026157483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:12,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085017318] [2021-07-13 20:41:12,556 INFO L93 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 [2021-07-13 20:41:12,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:12,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:12,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:12,866 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:41:13,088 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:41:13,180 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_201], 2=[v_prenex_199, v_prenex_200]} [2021-07-13 20:41:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:41:13,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:13,298 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:41:13,299 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.9 percent of original size [2021-07-13 20:41:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:13,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:13,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:13,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:13,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:13,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:13,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:13,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:13,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:13,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:13,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:13,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:13,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:13,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:13,449 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:217, output treesize:51 [2021-07-13 20:41:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:13,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085017318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:13,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:13,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:41:13,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702117477] [2021-07-13 20:41:13,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:13,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:13,500 INFO L87 Difference]: Start difference. First operand 1864 states and 6365 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:14,657 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:41:15,046 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-13 20:41:15,344 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-13 20:41:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:15,492 INFO L93 Difference]: Finished difference Result 2480 states and 8310 transitions. [2021-07-13 20:41:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:41:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:15,496 INFO L225 Difference]: With dead ends: 2480 [2021-07-13 20:41:15,496 INFO L226 Difference]: Without dead ends: 2465 [2021-07-13 20:41:15,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2338.0ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:41:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-13 20:41:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1863. [2021-07-13 20:41:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4162191192266382) internal successors, (6361), 1862 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6361 transitions. [2021-07-13 20:41:15,532 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6361 transitions. Word has length 26 [2021-07-13 20:41:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:15,533 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6361 transitions. [2021-07-13 20:41:15,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6361 transitions. [2021-07-13 20:41:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:15,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:15,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:15,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-07-13 20:41:15,736 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1946185846, now seen corresponding path program 34 times [2021-07-13 20:41:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:15,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374951177] [2021-07-13 20:41:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:15,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374951177] [2021-07-13 20:41:15,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374951177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871677767] [2021-07-13 20:41:15,991 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 20:41:16,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:16,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:16,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:16,279 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:41:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:16,384 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:16,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:16,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:16,493 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:41:16,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:16,505 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:16,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:16,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:16,607 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:41:16,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:16,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:16,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:16,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:16,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:16,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:16,839 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-13 20:41:16,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:16,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:16,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:16,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:16,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:16,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:17,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:17,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:17,055 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,152 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:17,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:17,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:17,241 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:41:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871677767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:41:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92494640] [2021-07-13 20:41:17,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:17,415 INFO L87 Difference]: Start difference. First operand 1863 states and 6361 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:17,942 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-07-13 20:41:18,365 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:41:18,829 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:41:19,194 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-07-13 20:41:19,377 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-13 20:41:19,622 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-13 20:41:19,764 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 20:41:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:19,835 INFO L93 Difference]: Finished difference Result 2968 states and 9767 transitions. [2021-07-13 20:41:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:41:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:19,840 INFO L225 Difference]: With dead ends: 2968 [2021-07-13 20:41:19,840 INFO L226 Difference]: Without dead ends: 2938 [2021-07-13 20:41:19,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2671.7ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:41:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-07-13 20:41:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1863. [2021-07-13 20:41:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4183673469387754) internal successors, (6365), 1862 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6365 transitions. [2021-07-13 20:41:19,870 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6365 transitions. Word has length 26 [2021-07-13 20:41:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:19,870 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6365 transitions. [2021-07-13 20:41:19,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6365 transitions. [2021-07-13 20:41:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:19,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:19,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:20,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2704,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:20,073 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 35 times [2021-07-13 20:41:20,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:20,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6252959] [2021-07-13 20:41:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:20,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6252959] [2021-07-13 20:41:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6252959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072433823] [2021-07-13 20:41:20,415 INFO L93 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 [2021-07-13 20:41:20,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:20,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:41:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:20,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:20,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:20,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:20,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:20,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:20,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:20,870 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:20,876 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:20,881 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:20,888 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:20,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:20,900 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:41:20,906 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:20,911 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:20,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:20,915 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:20,988 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:41:20,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:20,990 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:41:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072433823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:21,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:21,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:41:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86099353] [2021-07-13 20:41:21,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:41:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:41:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:21,039 INFO L87 Difference]: Start difference. First operand 1863 states and 6365 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:21,833 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:41:21,981 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-13 20:41:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:22,176 INFO L93 Difference]: Finished difference Result 2374 states and 7932 transitions. [2021-07-13 20:41:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:22,181 INFO L225 Difference]: With dead ends: 2374 [2021-07-13 20:41:22,181 INFO L226 Difference]: Without dead ends: 2353 [2021-07-13 20:41:22,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1375.3ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:41:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-07-13 20:41:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1878. [2021-07-13 20:41:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.4214171550346295) internal successors, (6422), 1877 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 6422 transitions. [2021-07-13 20:41:22,215 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 6422 transitions. Word has length 26 [2021-07-13 20:41:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:22,215 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 6422 transitions. [2021-07-13 20:41:22,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 6422 transitions. [2021-07-13 20:41:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:22,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:22,218 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:22,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2719,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:22,418 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 36 times [2021-07-13 20:41:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:22,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527680663] [2021-07-13 20:41:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:22,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:22,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527680663] [2021-07-13 20:41:22,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527680663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:22,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130683497] [2021-07-13 20:41:22,644 INFO L93 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 [2021-07-13 20:41:22,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:22,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:22,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:22,989 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:22,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:41:22,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:22,998 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:22,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:22,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,016 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:23,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:41:23,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,036 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:23,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:23,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,062 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:41:23,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,071 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:23,072 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,089 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:41:23,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,101 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:23,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,110 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:23,111 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,119 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:23,120 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,128 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:23,128 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,136 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:23,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:23,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:41:23,155 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:23,170 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,182 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:23,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:41:23,183 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:23,284 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:255 [2021-07-13 20:41:23,454 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:41:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130683497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:23,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:23,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:41:23,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317128928] [2021-07-13 20:41:23,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:23,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:23,544 INFO L87 Difference]: Start difference. First operand 1878 states and 6422 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:25,341 INFO L93 Difference]: Finished difference Result 2454 states and 8038 transitions. [2021-07-13 20:41:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:41:25,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:25,346 INFO L225 Difference]: With dead ends: 2454 [2021-07-13 20:41:25,346 INFO L226 Difference]: Without dead ends: 2416 [2021-07-13 20:41:25,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1797.5ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:41:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-07-13 20:41:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1866. [2021-07-13 20:41:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.420911528150134) internal successors, (6380), 1865 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6380 transitions. [2021-07-13 20:41:25,372 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6380 transitions. Word has length 26 [2021-07-13 20:41:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:25,372 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6380 transitions. [2021-07-13 20:41:25,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6380 transitions. [2021-07-13 20:41:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:25,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:25,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:25,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2747,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:25,589 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 37 times [2021-07-13 20:41:25,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:25,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568242564] [2021-07-13 20:41:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:25,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:25,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568242564] [2021-07-13 20:41:25,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568242564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:25,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501902102] [2021-07-13 20:41:25,831 INFO 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 [2021-07-13 20:41:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:26,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,105 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:26,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:26,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:26,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,142 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:26,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,154 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:26,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:26,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:26,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:26,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:26,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:26,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:26,194 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,202 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:41:26,203 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:26,215 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:26,226 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:26,235 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:26,243 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,248 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:26,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:26,249 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:26,345 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-13 20:41:26,495 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-13 20:41:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:26,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501902102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:26,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:26,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114545610] [2021-07-13 20:41:26,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:26,583 INFO L87 Difference]: Start difference. First operand 1866 states and 6380 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:27,038 INFO L93 Difference]: Finished difference Result 2282 states and 7604 transitions. [2021-07-13 20:41:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:41:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:27,050 INFO L225 Difference]: With dead ends: 2282 [2021-07-13 20:41:27,051 INFO L226 Difference]: Without dead ends: 2257 [2021-07-13 20:41:27,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-07-13 20:41:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1857. [2021-07-13 20:41:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.4132543103448274) internal successors, (6335), 1856 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6335 transitions. [2021-07-13 20:41:27,074 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6335 transitions. Word has length 26 [2021-07-13 20:41:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:27,074 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6335 transitions. [2021-07-13 20:41:27,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6335 transitions. [2021-07-13 20:41:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:27,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:27,076 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:27,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-07-13 20:41:27,277 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 38 times [2021-07-13 20:41:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:27,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686114910] [2021-07-13 20:41:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:27,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:27,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686114910] [2021-07-13 20:41:27,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686114910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:27,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296769575] [2021-07-13 20:41:27,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:41:27,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:27,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:27,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:27,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:27,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:41:27,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:27,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:27,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:27,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:27,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:27,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:27,900 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:27,906 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:27,911 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:27,916 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:27,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:27,925 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:27,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:27,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:27,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:27,929 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:28,002 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:41:28,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:28,003 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:41:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:28,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296769575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:28,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:28,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:28,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096835233] [2021-07-13 20:41:28,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:28,057 INFO L87 Difference]: Start difference. First operand 1857 states and 6335 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:28,323 INFO L93 Difference]: Finished difference Result 1943 states and 6537 transitions. [2021-07-13 20:41:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:28,327 INFO L225 Difference]: With dead ends: 1943 [2021-07-13 20:41:28,327 INFO L226 Difference]: Without dead ends: 1924 [2021-07-13 20:41:28,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-13 20:41:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1834. [2021-07-13 20:41:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.413529732678669) internal successors, (6257), 1833 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6257 transitions. [2021-07-13 20:41:28,351 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6257 transitions. Word has length 26 [2021-07-13 20:41:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:28,351 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6257 transitions. [2021-07-13 20:41:28,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6257 transitions. [2021-07-13 20:41:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:28,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:28,354 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:28,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2839,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:28,554 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-13 20:41:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:28,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426386041] [2021-07-13 20:41:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:28,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426386041] [2021-07-13 20:41:28,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426386041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501846566] [2021-07-13 20:41:28,762 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 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 [2021-07-13 20:41:28,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:28,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:29,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,146 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:29,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:41:29,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,168 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:29,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:41:29,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,328 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:41:29,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:41:29,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,368 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:29,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:29,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,624 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-13 20:41:29,625 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-13 20:41:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:29,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,662 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:29,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:41:29,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,899 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-13 20:41:29,899 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.1 percent of original size [2021-07-13 20:41:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,916 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:29,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:41:29,918 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:41:29,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:30,043 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:41:30,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:30,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:30,059 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-07-13 20:41:30,240 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-13 20:41:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501846566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:30,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:30,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:41:30,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901042658] [2021-07-13 20:41:30,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:30,329 INFO L87 Difference]: Start difference. First operand 1834 states and 6257 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:30,987 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 20:41:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:31,191 INFO L93 Difference]: Finished difference Result 2041 states and 6856 transitions. [2021-07-13 20:41:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:31,195 INFO L225 Difference]: With dead ends: 2041 [2021-07-13 20:41:31,195 INFO L226 Difference]: Without dead ends: 2016 [2021-07-13 20:41:31,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1158.5ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:41:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-07-13 20:41:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1816. [2021-07-13 20:41:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.41763085399449) internal successors, (6203), 1815 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6203 transitions. [2021-07-13 20:41:31,219 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6203 transitions. Word has length 26 [2021-07-13 20:41:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:31,219 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6203 transitions. [2021-07-13 20:41:31,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6203 transitions. [2021-07-13 20:41:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:31,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:31,222 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:31,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-07-13 20:41:31,423 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-07-13 20:41:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:31,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853195388] [2021-07-13 20:41:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:31,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:31,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853195388] [2021-07-13 20:41:31,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853195388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:31,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158149210] [2021-07-13 20:41:31,674 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 20:41:31,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:31,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:32,018 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:41:32,105 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_232], 3=[v_prenex_233, v_prenex_234]} [2021-07-13 20:41:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:32,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:32,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,257 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:41:32,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:32,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:32,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,399 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:41:32,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,412 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:32,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:41:32,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:41:32,426 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,533 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:41:32,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:41:32,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,558 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:41:32,559 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:32,660 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:361, output treesize:194 [2021-07-13 20:41:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:32,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158149210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:32,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:32,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:41:32,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502900269] [2021-07-13 20:41:32,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:32,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:32,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:32,842 INFO L87 Difference]: Start difference. First operand 1816 states and 6203 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:33,078 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-07-13 20:41:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:33,505 INFO L93 Difference]: Finished difference Result 2323 states and 7788 transitions. [2021-07-13 20:41:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:33,509 INFO L225 Difference]: With dead ends: 2323 [2021-07-13 20:41:33,509 INFO L226 Difference]: Without dead ends: 2298 [2021-07-13 20:41:33,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-13 20:41:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1804. [2021-07-13 20:41:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4170826400443706) internal successors, (6161), 1803 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6161 transitions. [2021-07-13 20:41:33,534 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6161 transitions. Word has length 26 [2021-07-13 20:41:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:33,534 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6161 transitions. [2021-07-13 20:41:33,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6161 transitions. [2021-07-13 20:41:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:33,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:33,537 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:33,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:33,737 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:33,737 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-13 20:41:33,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:33,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188072813] [2021-07-13 20:41:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:33,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188072813] [2021-07-13 20:41:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188072813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743359015] [2021-07-13 20:41:33,987 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 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 [2021-07-13 20:41:34,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:34,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:41:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:34,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:34,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:34,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:34,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:34,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:34,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:34,395 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:34,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:34,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:41:34,411 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:41:34,416 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:34,422 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:34,427 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:34,432 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:34,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:34,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:34,436 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:34,504 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:41:34,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:34,505 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:41:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:34,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743359015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:34,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:34,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:41:34,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467664984] [2021-07-13 20:41:34,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:41:34,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:41:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:34,555 INFO L87 Difference]: Start difference. First operand 1804 states and 6161 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:35,394 INFO L93 Difference]: Finished difference Result 2327 states and 7784 transitions. [2021-07-13 20:41:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:41:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:35,398 INFO L225 Difference]: With dead ends: 2327 [2021-07-13 20:41:35,398 INFO L226 Difference]: Without dead ends: 2312 [2021-07-13 20:41:35,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:41:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-13 20:41:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1849. [2021-07-13 20:41:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-07-13 20:41:35,456 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-07-13 20:41:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:35,456 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-07-13 20:41:35,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-07-13 20:41:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:35,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:35,459 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:35,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:35,673 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-13 20:41:35,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:35,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987659918] [2021-07-13 20:41:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:35,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987659918] [2021-07-13 20:41:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987659918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164818163] [2021-07-13 20:41:35,958 INFO L93 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 [2021-07-13 20:41:35,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:36,301 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:41:36,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,310 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:36,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,318 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:36,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,326 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:36,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,335 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:36,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:36,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,358 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:36,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,366 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:36,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,374 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:36,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:36,375 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:36,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,407 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:41:36,409 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:41:36,426 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,443 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:41:36,445 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,462 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:41:36,465 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,482 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:41:36,486 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,498 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:36,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:36,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,600 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-13 20:41:36,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:36,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:36,611 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:247 [2021-07-13 20:41:36,770 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:41:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:36,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164818163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:36,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:36,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:41:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162689486] [2021-07-13 20:41:36,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:41:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:41:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:36,884 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,874 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-13 20:41:38,042 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-07-13 20:41:38,457 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-07-13 20:41:38,622 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-07-13 20:41:38,852 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-07-13 20:41:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,884 INFO L93 Difference]: Finished difference Result 2674 states and 8821 transitions. [2021-07-13 20:41:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:41:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,889 INFO L225 Difference]: With dead ends: 2674 [2021-07-13 20:41:38,889 INFO L226 Difference]: Without dead ends: 2644 [2021-07-13 20:41:38,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2262.5ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:41:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-07-13 20:41:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1849. [2021-07-13 20:41:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-07-13 20:41:38,917 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-07-13 20:41:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,917 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-07-13 20:41:38,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-07-13 20:41:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:38,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,919 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:39,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-07-13 20:41:39,120 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-13 20:41:39,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999869192] [2021-07-13 20:41:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999869192] [2021-07-13 20:41:39,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999869192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817404524] [2021-07-13 20:41:39,412 INFO 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 [2021-07-13 20:41:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:41:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:39,711 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[A, v_prenex_240, v_prenex_236]} [2021-07-13 20:41:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:39,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:39,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:39,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:39,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:39,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:39,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:39,860 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-13 20:41:39,861 INFO L628 ElimStorePlain]: treesize reduction 158, result has 46.4 percent of original size [2021-07-13 20:41:39,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:39,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:41:39,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:39,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:39,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:39,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:39,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:39,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:39,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:41:39,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:39,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:39,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:39,991 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:335, output treesize:51 [2021-07-13 20:41:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817404524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:40,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:41:40,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034322885] [2021-07-13 20:41:40,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:40,046 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,672 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-13 20:41:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,772 INFO L93 Difference]: Finished difference Result 2432 states and 8093 transitions. [2021-07-13 20:41:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:41:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,776 INFO L225 Difference]: With dead ends: 2432 [2021-07-13 20:41:40,776 INFO L226 Difference]: Without dead ends: 2402 [2021-07-13 20:41:40,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1016.2ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:41:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-07-13 20:41:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1851. [2021-07-13 20:41:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 3.4135135135135135) internal successors, (6315), 1850 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 6315 transitions. [2021-07-13 20:41:40,800 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 6315 transitions. Word has length 26 [2021-07-13 20:41:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,801 INFO L482 AbstractCegarLoop]: Abstraction has 1851 states and 6315 transitions. [2021-07-13 20:41:40,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 6315 transitions. [2021-07-13 20:41:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:40,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:41,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:41,004 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-13 20:41:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:41,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341707560] [2021-07-13 20:41:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:41,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341707560] [2021-07-13 20:41:41,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341707560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987456989] [2021-07-13 20:41:41,280 INFO L93 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 [2021-07-13 20:41:41,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:41,829 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:41,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:41:41,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:41,849 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:41,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:41:41,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:41,997 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:41:41,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:42,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:42,018 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:42,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-07-13 20:41:42,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:42,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:42,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:42,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2021-07-13 20:41:42,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:42,308 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-07-13 20:41:42,308 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-07-13 20:41:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:42,327 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:42,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:41:42,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:42,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:41:42,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:42,473 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:41:42,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:42,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:42,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:41:42,495 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:42,511 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:42,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:42,513 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:42,747 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-13 20:41:42,747 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-07-13 20:41:42,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:42,773 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:385, output treesize:286 [2021-07-13 20:41:42,968 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 20:41:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987456989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:43,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:41:43,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722769790] [2021-07-13 20:41:43,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:43,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:43,059 INFO L87 Difference]: Start difference. First operand 1851 states and 6315 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,348 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-13 20:41:43,602 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-07-13 20:41:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:44,107 INFO L93 Difference]: Finished difference Result 2442 states and 8174 transitions. [2021-07-13 20:41:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:41:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:44,112 INFO L225 Difference]: With dead ends: 2442 [2021-07-13 20:41:44,112 INFO L226 Difference]: Without dead ends: 2427 [2021-07-13 20:41:44,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1471.8ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-07-13 20:41:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1869. [2021-07-13 20:41:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.4095289079229123) internal successors, (6369), 1868 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6369 transitions. [2021-07-13 20:41:44,139 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6369 transitions. Word has length 26 [2021-07-13 20:41:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:44,139 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6369 transitions. [2021-07-13 20:41:44,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6369 transitions. [2021-07-13 20:41:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:44,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:44,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:44,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:44,342 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-13 20:41:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:44,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839098186] [2021-07-13 20:41:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839098186] [2021-07-13 20:41:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839098186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803897933] [2021-07-13 20:41:44,569 INFO L93 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 [2021-07-13 20:41:44,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:44,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,980 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:41:45,217 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:41:45,304 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_256, v_prenex_257], 2=[A, v_prenex_258]} [2021-07-13 20:41:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:45,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:45,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,442 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:41:45,442 INFO L628 ElimStorePlain]: treesize reduction 130, result has 54.7 percent of original size [2021-07-13 20:41:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:41:45,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:45,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:45,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:45,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:45,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:45,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:45,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:45,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:45,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:45,588 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:317, output treesize:51 [2021-07-13 20:41:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803897933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:45,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:41:45,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016185434] [2021-07-13 20:41:45,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:45,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:45,641 INFO L87 Difference]: Start difference. First operand 1869 states and 6369 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,223 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:41:46,454 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-07-13 20:41:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:46,554 INFO L93 Difference]: Finished difference Result 1982 states and 6684 transitions. [2021-07-13 20:41:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:41:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:46,558 INFO L225 Difference]: With dead ends: 1982 [2021-07-13 20:41:46,558 INFO L226 Difference]: Without dead ends: 1967 [2021-07-13 20:41:46,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1381.3ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:41:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-13 20:41:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1890. [2021-07-13 20:41:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4060349391212283) internal successors, (6434), 1889 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6434 transitions. [2021-07-13 20:41:46,590 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6434 transitions. Word has length 26 [2021-07-13 20:41:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:46,590 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6434 transitions. [2021-07-13 20:41:46,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6434 transitions. [2021-07-13 20:41:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:46,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:46,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:46,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-07-13 20:41:46,793 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-13 20:41:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:46,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236158891] [2021-07-13 20:41:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236158891] [2021-07-13 20:41:46,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236158891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034981891] [2021-07-13 20:41:46,996 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 20:41:47,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:47,426 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:41:47,472 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_270, v_prenex_264, v_prenex_266], 3=[v_prenex_271, v_prenex_273, v_prenex_265, v_prenex_268]} [2021-07-13 20:41:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:47,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:47,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:47,598 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:41:47,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:47,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:47,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:47,727 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:41:47,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:47,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:47,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:47,861 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:41:47,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:47,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:47,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:47,980 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:41:47,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:47,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:41:47,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:48,098 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:41:48,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:48,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:48,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:41:48,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:48,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:48,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:48,223 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:41:48,224 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:48,329 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:41:48,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:48,339 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:48,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:41:48,340 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:48,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:48,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:48,454 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:194 [2021-07-13 20:41:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034981891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:48,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:41:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201041050] [2021-07-13 20:41:48,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:48,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:48,694 INFO L87 Difference]: Start difference. First operand 1890 states and 6434 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,487 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:41:49,861 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-07-13 20:41:50,062 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-07-13 20:41:50,289 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-07-13 20:41:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:50,406 INFO L93 Difference]: Finished difference Result 2744 states and 9064 transitions. [2021-07-13 20:41:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:41:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:50,411 INFO L225 Difference]: With dead ends: 2744 [2021-07-13 20:41:50,411 INFO L226 Difference]: Without dead ends: 2714 [2021-07-13 20:41:50,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1929.9ms TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:41:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-07-13 20:41:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1888. [2021-07-13 20:41:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.408055113937467) internal successors, (6431), 1887 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6431 transitions. [2021-07-13 20:41:50,440 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6431 transitions. Word has length 26 [2021-07-13 20:41:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:50,440 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6431 transitions. [2021-07-13 20:41:50,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6431 transitions. [2021-07-13 20:41:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:50,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:50,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:50,644 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,644 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-13 20:41:50,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954392636] [2021-07-13 20:41:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954392636] [2021-07-13 20:41:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954392636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570336602] [2021-07-13 20:41:50,950 INFO L93 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 [2021-07-13 20:41:50,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:51,360 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:41:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:51,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,481 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:51,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,597 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:41:51,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:51,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:51,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,727 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:41:51,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:51,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:51,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:51,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,853 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:41:51,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,865 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:51,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:51,876 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:51,970 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-13 20:41:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570336602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:41:52,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075340570] [2021-07-13 20:41:52,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:52,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:52,156 INFO L87 Difference]: Start difference. First operand 1888 states and 6431 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,913 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:41:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:52,974 INFO L93 Difference]: Finished difference Result 2422 states and 8105 transitions. [2021-07-13 20:41:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:41:52,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:52,979 INFO L225 Difference]: With dead ends: 2422 [2021-07-13 20:41:52,979 INFO L226 Difference]: Without dead ends: 2397 [2021-07-13 20:41:52,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:41:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-13 20:41:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1888. [2021-07-13 20:41:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-07-13 20:41:53,007 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-07-13 20:41:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:53,007 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-07-13 20:41:53,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-07-13 20:41:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:53,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:53,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:53,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-07-13 20:41:53,213 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-13 20:41:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795459432] [2021-07-13 20:41:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795459432] [2021-07-13 20:41:53,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795459432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616343880] [2021-07-13 20:41:53,507 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 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 [2021-07-13 20:41:53,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:53,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,727 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:53,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:53,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:53,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:53,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:53,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:53,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:41:53,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:53,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:53,814 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,822 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:53,823 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:53,841 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:53,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:53,855 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,868 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:53,870 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:53,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:53,882 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:53,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:53,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:53,888 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:53,957 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:41:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616343880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:41:54,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674691998] [2021-07-13 20:41:54,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:54,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:54,148 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:54,877 INFO L93 Difference]: Finished difference Result 2430 states and 8144 transitions. [2021-07-13 20:41:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:54,881 INFO L225 Difference]: With dead ends: 2430 [2021-07-13 20:41:54,881 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 20:41:54,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 998.4ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:41:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 20:41:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1888. [2021-07-13 20:41:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-07-13 20:41:54,907 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-07-13 20:41:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,907 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-07-13 20:41:54,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-07-13 20:41:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:54,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:55,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-07-13 20:41:55,110 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:55,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:55,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-13 20:41:55,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:55,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921521408] [2021-07-13 20:41:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921521408] [2021-07-13 20:41:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921521408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305547374] [2021-07-13 20:41:55,513 INFO 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 [2021-07-13 20:41:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:55,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:55,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:55,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:55,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:41:55,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:55,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:41:56,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:41:56,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:41:56,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:41:56,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:41:56,032 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:41:56,039 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:41:56,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:41:56,054 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:41:56,061 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:41:56,068 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:41:56,076 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:41:56,082 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:41:56,102 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:56,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:56,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:41:56,106 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,132 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-13 20:41:56,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:41:56,133 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:41:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305547374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:56,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:41:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298853311] [2021-07-13 20:41:56,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:56,162 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:56,807 INFO L93 Difference]: Finished difference Result 2457 states and 7898 transitions. [2021-07-13 20:41:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:41:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:56,812 INFO L225 Difference]: With dead ends: 2457 [2021-07-13 20:41:56,812 INFO L226 Difference]: Without dead ends: 2420 [2021-07-13 20:41:56,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 924.8ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:41:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-07-13 20:41:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1914. [2021-07-13 20:41:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.410350235232619) internal successors, (6524), 1913 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6524 transitions. [2021-07-13 20:41:56,839 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6524 transitions. Word has length 26 [2021-07-13 20:41:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:56,839 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6524 transitions. [2021-07-13 20:41:56,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6524 transitions. [2021-07-13 20:41:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:56,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:56,842 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:57,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3191 [2021-07-13 20:41:57,042 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-13 20:41:57,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385874531] [2021-07-13 20:41:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385874531] [2021-07-13 20:41:57,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385874531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114187713] [2021-07-13 20:41:57,292 INFO L93 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 [2021-07-13 20:41:57,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:57,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:57,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:57,574 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-13 20:41:57,622 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_283, v_prenex_285], 6=[A, v_prenex_287]} [2021-07-13 20:41:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:57,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:57,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:57,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:41:57,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:57,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:57,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:41:57,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:57,732 INFO L628 ElimStorePlain]: treesize reduction 166, result has 44.9 percent of original size [2021-07-13 20:41:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:57,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:41:57,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:57,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:57,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:57,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:41:57,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:57,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:57,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:41:57,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:57,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:57,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:41:57,860 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-13 20:41:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114187713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:57,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:41:57,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439212025] [2021-07-13 20:41:57,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:57,901 INFO L87 Difference]: Start difference. First operand 1914 states and 6524 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,700 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:41:58,850 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-13 20:41:58,989 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-13 20:41:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:59,080 INFO L93 Difference]: Finished difference Result 2392 states and 7936 transitions. [2021-07-13 20:41:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:41:59,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:59,085 INFO L225 Difference]: With dead ends: 2392 [2021-07-13 20:41:59,085 INFO L226 Difference]: Without dead ends: 2346 [2021-07-13 20:41:59,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1327.9ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:41:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-13 20:41:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1910. [2021-07-13 20:41:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.4038763750654795) internal successors, (6498), 1909 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6498 transitions. [2021-07-13 20:41:59,109 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6498 transitions. Word has length 26 [2021-07-13 20:41:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:59,109 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 6498 transitions. [2021-07-13 20:41:59,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6498 transitions. [2021-07-13 20:41:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:59,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:59,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:59,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3305 [2021-07-13 20:41:59,312 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-13 20:41:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760601670] [2021-07-13 20:41:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760601670] [2021-07-13 20:41:59,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760601670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666263729] [2021-07-13 20:41:59,665 INFO L93 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 [2021-07-13 20:41:59,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:59,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:00,073 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:42:00,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,366 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:42:00,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:42:00,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,395 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:42:00,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:42:00,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:00,747 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-13 20:42:00,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:00,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,777 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:42:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:42:00,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:00,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:00,805 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:42:00,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:01,146 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-13 20:42:01,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:01,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:01,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:42:01,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,197 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:42:01,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:42:01,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:01,500 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-13 20:42:01,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,533 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:42:01,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:01,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,566 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:42:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:42:01,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:01,849 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:42:01,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:01,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:42:01,883 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:01,908 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:01,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:42:01,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,677 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 124 [2021-07-13 20:42:02,677 INFO L628 ElimStorePlain]: treesize reduction 40, result has 93.4 percent of original size [2021-07-13 20:42:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,707 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:02,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:42:02,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,723 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:42:02,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:42:02,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,938 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:42:02,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,973 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:42:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:42:02,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,998 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:02,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:42:03,002 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:03,366 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-07-13 20:42:03,366 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.7 percent of original size [2021-07-13 20:42:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:03,392 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:42:03,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:42:03,394 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:03,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:42:03,419 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:03,581 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:42:03,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:03,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:42:03,594 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-07-13 20:42:03,744 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-07-13 20:42:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666263729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:03,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:42:03,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404058406] [2021-07-13 20:42:03,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:03,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:03,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:03,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:03,771 INFO L87 Difference]: Start difference. First operand 1910 states and 6498 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,660 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:42:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,880 INFO L93 Difference]: Finished difference Result 2172 states and 7282 transitions. [2021-07-13 20:42:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,884 INFO L225 Difference]: With dead ends: 2172 [2021-07-13 20:42:04,884 INFO L226 Difference]: Without dead ends: 2157 [2021-07-13 20:42:04,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1543.5ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-07-13 20:42:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1922. [2021-07-13 20:42:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.407600208224883) internal successors, (6546), 1921 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6546 transitions. [2021-07-13 20:42:04,908 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6546 transitions. Word has length 26 [2021-07-13 20:42:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,908 INFO L482 AbstractCegarLoop]: Abstraction has 1922 states and 6546 transitions. [2021-07-13 20:42:04,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6546 transitions. [2021-07-13 20:42:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:04,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:05,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-07-13 20:42:05,125 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-13 20:42:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:05,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331412094] [2021-07-13 20:42:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331412094] [2021-07-13 20:42:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331412094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336560140] [2021-07-13 20:42:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:42:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:05,879 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:42:05,909 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_307, v_prenex_309]} [2021-07-13 20:42:05,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:05,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,012 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:42:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:06,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:06,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:06,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:06,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:06,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:06,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:06,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:06,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:06,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:42:06,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:42:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336560140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:06,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:42:06,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303360236] [2021-07-13 20:42:06,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:06,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:06,152 INFO L87 Difference]: Start difference. First operand 1922 states and 6546 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,680 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 20:42:07,012 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 20:42:07,175 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-07-13 20:42:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:07,334 INFO L93 Difference]: Finished difference Result 2493 states and 8257 transitions. [2021-07-13 20:42:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:42:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:07,338 INFO L225 Difference]: With dead ends: 2493 [2021-07-13 20:42:07,338 INFO L226 Difference]: Without dead ends: 2478 [2021-07-13 20:42:07,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1494.1ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:42:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-13 20:42:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1933. [2021-07-13 20:42:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.4078674948240164) internal successors, (6584), 1932 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6584 transitions. [2021-07-13 20:42:07,364 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6584 transitions. Word has length 26 [2021-07-13 20:42:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:07,364 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6584 transitions. [2021-07-13 20:42:07,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6584 transitions. [2021-07-13 20:42:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:07,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:07,366 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:07,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:07,567 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:07,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-13 20:42:07,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:07,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557544744] [2021-07-13 20:42:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557544744] [2021-07-13 20:42:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557544744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292972010] [2021-07-13 20:42:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:42:07,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:07,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:08,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:42:08,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:42:08,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:42:08,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:42:08,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:42:08,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:42:08,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:42:08,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:42:08,436 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:42:08,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:42:08,451 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:42:08,458 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:42:08,465 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:42:08,471 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:42:08,477 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:08,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:42:08,482 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,506 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:42:08,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:42:08,507 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:42:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292972010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:08,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:42:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747614575] [2021-07-13 20:42:08,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:08,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:08,535 INFO L87 Difference]: Start difference. First operand 1933 states and 6584 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,991 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-13 20:42:09,306 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:42:09,774 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:42:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:10,100 INFO L93 Difference]: Finished difference Result 3085 states and 9838 transitions. [2021-07-13 20:42:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:10,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:10,106 INFO L225 Difference]: With dead ends: 3085 [2021-07-13 20:42:10,106 INFO L226 Difference]: Without dead ends: 3042 [2021-07-13 20:42:10,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1644.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:42:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-07-13 20:42:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2025. [2021-07-13 20:42:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4234189723320156) internal successors, (6929), 2024 states have internal predecessors, (6929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6929 transitions. [2021-07-13 20:42:10,139 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6929 transitions. Word has length 26 [2021-07-13 20:42:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:10,139 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 6929 transitions. [2021-07-13 20:42:10,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6929 transitions. [2021-07-13 20:42:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:10,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:10,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:10,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-07-13 20:42:10,342 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-13 20:42:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:10,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558165841] [2021-07-13 20:42:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:10,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558165841] [2021-07-13 20:42:10,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558165841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844722745] [2021-07-13 20:42:10,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:42:10,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:42:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:11,249 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:42:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:11,855 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:42:11,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:42:11,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,005 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:42:12,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:12,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:42:12,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,176 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:42:12,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:12,201 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:42:12,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:42:12,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,352 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-13 20:42:12,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:12,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:42:12,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,531 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-13 20:42:12,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:12,552 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:42:12,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:42:12,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,696 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:42:12,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:12,718 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:42:12,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:42:12,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,861 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:42:12,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:12,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:42:12,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:13,014 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:42:13,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:13,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:13,036 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:42:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:42:13,037 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:13,168 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:42:13,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:13,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:42:13,190 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:513 [2021-07-13 20:42:13,532 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-07-13 20:42:13,805 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-13 20:42:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844722745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:13,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:42:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781027106] [2021-07-13 20:42:13,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:13,911 INFO L87 Difference]: Start difference. First operand 2025 states and 6929 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:14,786 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-07-13 20:42:15,494 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-07-13 20:42:16,102 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-07-13 20:42:16,346 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-13 20:42:16,823 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2021-07-13 20:42:17,293 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-07-13 20:42:17,759 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2021-07-13 20:42:18,253 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-07-13 20:42:18,643 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-07-13 20:42:19,177 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-07-13 20:42:19,510 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 84 [2021-07-13 20:42:19,960 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-13 20:42:20,408 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-07-13 20:42:20,711 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-07-13 20:42:21,300 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2021-07-13 20:42:21,603 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-07-13 20:42:22,046 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-07-13 20:42:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:22,145 INFO L93 Difference]: Finished difference Result 2870 states and 9420 transitions. [2021-07-13 20:42:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:42:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:22,150 INFO L225 Difference]: With dead ends: 2870 [2021-07-13 20:42:22,150 INFO L226 Difference]: Without dead ends: 2855 [2021-07-13 20:42:22,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 8556.4ms TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-07-13 20:42:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2033. [2021-07-13 20:42:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4247047244094486) internal successors, (6959), 2032 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6959 transitions. [2021-07-13 20:42:22,180 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6959 transitions. Word has length 26 [2021-07-13 20:42:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:22,180 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6959 transitions. [2021-07-13 20:42:22,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6959 transitions. [2021-07-13 20:42:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:22,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:22,183 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:22,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3503,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:22,384 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-07-13 20:42:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045087933] [2021-07-13 20:42:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:22,627 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 20:42:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:22,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045087933] [2021-07-13 20:42:22,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045087933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973136723] [2021-07-13 20:42:22,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:42:22,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:22,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:23,111 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:42:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:42:23,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,288 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:42:23,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,300 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:42:23,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:42:23,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,407 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:42:23,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,419 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:42:23,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:42:23,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:42:23,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:42:23,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:42:23,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:42:23,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:23,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,965 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:42:23,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:23,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:42:23,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:24,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:24,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:42:24,071 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:42:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:24,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973136723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:24,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:42:24,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702951264] [2021-07-13 20:42:24,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:24,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:24,243 INFO L87 Difference]: Start difference. First operand 2033 states and 6959 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,617 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-13 20:42:25,519 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:42:25,665 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-13 20:42:25,859 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 20:42:26,032 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-07-13 20:42:26,389 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:42:26,578 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:42:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:26,676 INFO L93 Difference]: Finished difference Result 2982 states and 9848 transitions. [2021-07-13 20:42:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:26,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:26,682 INFO L225 Difference]: With dead ends: 2982 [2021-07-13 20:42:26,682 INFO L226 Difference]: Without dead ends: 2967 [2021-07-13 20:42:26,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2656.6ms TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:42:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-07-13 20:42:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2028. [2021-07-13 20:42:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 3.4257523433645782) internal successors, (6944), 2027 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 6944 transitions. [2021-07-13 20:42:26,713 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 6944 transitions. Word has length 26 [2021-07-13 20:42:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:26,713 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 6944 transitions. [2021-07-13 20:42:26,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 6944 transitions. [2021-07-13 20:42:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:26,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:26,716 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:26,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3569 [2021-07-13 20:42:26,917 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-13 20:42:26,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:26,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942672244] [2021-07-13 20:42:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:27,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:27,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942672244] [2021-07-13 20:42:27,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942672244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:27,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325583258] [2021-07-13 20:42:27,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:42:27,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:27,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:42:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:27,623 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:42:27,972 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-07-13 20:42:28,194 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-07-13 20:42:28,432 INFO L446 ElimStorePlain]: Different costs {20=[v_prenex_385], 27=[A]} [2021-07-13 20:42:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:42:28,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:42:28,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:28,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:42:28,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,602 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-13 20:42:28,602 INFO L628 ElimStorePlain]: treesize reduction 114, result has 56.3 percent of original size [2021-07-13 20:42:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:42:28,608 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:28,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:28,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:28,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:42:28,659 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:399, output treesize:89 [2021-07-13 20:42:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325583258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:28,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 20:42:28,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35398949] [2021-07-13 20:42:28,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:28,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:28,735 INFO L87 Difference]: Start difference. First operand 2028 states and 6944 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:29,492 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:42:29,920 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-07-13 20:42:30,107 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:42:30,441 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 71 [2021-07-13 20:42:30,801 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-07-13 20:42:31,079 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-07-13 20:42:31,463 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2021-07-13 20:42:31,842 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2021-07-13 20:42:32,079 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 47 [2021-07-13 20:42:32,439 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-07-13 20:42:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:32,539 INFO L93 Difference]: Finished difference Result 3633 states and 11658 transitions. [2021-07-13 20:42:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:32,545 INFO L225 Difference]: With dead ends: 3633 [2021-07-13 20:42:32,545 INFO L226 Difference]: Without dead ends: 3546 [2021-07-13 20:42:32,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4206.7ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:42:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-07-13 20:42:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2151. [2021-07-13 20:42:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4288372093023254) internal successors, (7372), 2150 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7372 transitions. [2021-07-13 20:42:32,583 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7372 transitions. Word has length 26 [2021-07-13 20:42:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:32,584 INFO L482 AbstractCegarLoop]: Abstraction has 2151 states and 7372 transitions. [2021-07-13 20:42:32,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7372 transitions. [2021-07-13 20:42:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:32,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:32,586 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:32,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-07-13 20:42:32,787 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-13 20:42:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:32,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777488390] [2021-07-13 20:42:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:33,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:33,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777488390] [2021-07-13 20:42:33,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777488390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039579097] [2021-07-13 20:42:33,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:42:33,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:33,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:33,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:42:33,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:33,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 53 [2021-07-13 20:42:33,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:42:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,359 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:42:33,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 44 [2021-07-13 20:42:33,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,399 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:42:33,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 40 [2021-07-13 20:42:33,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,421 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:42:33,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,452 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:42:33,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 27 [2021-07-13 20:42:33,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,480 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:42:33,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:42:33,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,498 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:42:33,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,516 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:42:33,516 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,533 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:42:33,534 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,550 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:42:33,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,568 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 1 [2021-07-13 20:42:33,569 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,585 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:42:33,586 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,611 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:42:33,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:42:33,612 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,637 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:42:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 20 [2021-07-13 20:42:33,639 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,656 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:42:33,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:42:33,657 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 20:42:33,661 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,751 INFO L628 ElimStorePlain]: treesize reduction 115, result has 45.2 percent of original size [2021-07-13 20:42:33,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:42:33,752 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:95 [2021-07-13 20:42:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:33,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039579097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:33,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 20:42:33,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582943875] [2021-07-13 20:42:33,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:33,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:33,914 INFO L87 Difference]: Start difference. First operand 2151 states and 7372 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:35,170 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-07-13 20:42:35,538 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:42:35,753 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-07-13 20:42:36,075 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-07-13 20:42:36,359 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-13 20:42:36,760 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-07-13 20:42:37,083 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2021-07-13 20:42:37,269 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-07-13 20:42:37,431 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:42:37,777 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-07-13 20:42:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:37,889 INFO L93 Difference]: Finished difference Result 3952 states and 12614 transitions. [2021-07-13 20:42:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:42:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:37,896 INFO L225 Difference]: With dead ends: 3952 [2021-07-13 20:42:37,896 INFO L226 Difference]: Without dead ends: 3864 [2021-07-13 20:42:37,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3584.1ms TimeCoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:42:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-07-13 20:42:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 2137. [2021-07-13 20:42:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.431179775280899) internal successors, (7329), 2136 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7329 transitions. [2021-07-13 20:42:37,934 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7329 transitions. Word has length 26 [2021-07-13 20:42:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:37,934 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7329 transitions. [2021-07-13 20:42:37,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7329 transitions. [2021-07-13 20:42:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:37,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:37,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:38,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3606 [2021-07-13 20:42:38,154 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1912368818, now seen corresponding path program 52 times [2021-07-13 20:42:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:38,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310514700] [2021-07-13 20:42:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:38,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:38,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310514700] [2021-07-13 20:42:38,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310514700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:38,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499882910] [2021-07-13 20:42:38,548 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 20:42:38,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:38,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:38,919 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:42:39,140 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_397, v_prenex_398]} [2021-07-13 20:42:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:39,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:39,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:39,248 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:42:39,249 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:42:39,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:39,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:39,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:39,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:39,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:39,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:39,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:39,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:39,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:39,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:42:39,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:42:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499882910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:39,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:42:39,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599756726] [2021-07-13 20:42:39,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:39,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:39,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:39,394 INFO L87 Difference]: Start difference. First operand 2137 states and 7329 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,233 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-13 20:42:40,441 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-07-13 20:42:40,792 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:42:41,003 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-07-13 20:42:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:41,144 INFO L93 Difference]: Finished difference Result 2703 states and 9088 transitions. [2021-07-13 20:42:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:42:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:41,149 INFO L225 Difference]: With dead ends: 2703 [2021-07-13 20:42:41,149 INFO L226 Difference]: Without dead ends: 2688 [2021-07-13 20:42:41,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2025.4ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-07-13 20:42:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2150. [2021-07-13 20:42:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 3.4290367612843182) internal successors, (7369), 2149 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 7369 transitions. [2021-07-13 20:42:41,177 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 7369 transitions. Word has length 26 [2021-07-13 20:42:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:41,178 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 7369 transitions. [2021-07-13 20:42:41,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 7369 transitions. [2021-07-13 20:42:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:41,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:41,181 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:41,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3638,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:41,381 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 53 times [2021-07-13 20:42:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:41,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094420096] [2021-07-13 20:42:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:41,645 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 20:42:41,761 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 20:42:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:41,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094420096] [2021-07-13 20:42:41,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094420096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714520719] [2021-07-13 20:42:41,867 INFO L93 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 [2021-07-13 20:42:41,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:41,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:42:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:42,405 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:42:42,502 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_421, v_prenex_410, v_prenex_412], 6=[v_prenex_415, v_prenex_405, v_prenex_418, v_prenex_408]} [2021-07-13 20:42:42,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:42,539 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:42:42,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:42:42,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:42,879 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-07-13 20:42:42,880 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-07-13 20:42:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:42,903 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:42:42,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:42:42,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:43,041 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-07-13 20:42:43,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:43,063 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:42:43,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:42:43,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:43,195 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:42:43,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:43,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:43,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:42:43,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:43,475 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2021-07-13 20:42:43,476 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-13 20:42:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:43,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:43,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:42:43,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:43,620 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:42:43,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:43,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:42:43,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:43,877 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2021-07-13 20:42:43,877 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.0 percent of original size [2021-07-13 20:42:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:43,896 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:42:43,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:42:43,897 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:44,008 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:42:44,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:44,036 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:42:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:42:44,038 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:44,143 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:42:44,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:44,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:42:44,160 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:334 [2021-07-13 20:42:44,358 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 20:42:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:44,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714520719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:44,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:42:44,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134867035] [2021-07-13 20:42:44,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:44,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:44,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:44,455 INFO L87 Difference]: Start difference. First operand 2150 states and 7369 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,043 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2021-07-13 20:42:45,473 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-13 20:42:45,672 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-13 20:42:45,985 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-07-13 20:42:46,188 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-13 20:42:46,522 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-07-13 20:42:46,750 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:42:47,150 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-07-13 20:42:47,485 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-07-13 20:42:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:47,544 INFO L93 Difference]: Finished difference Result 3064 states and 10226 transitions. [2021-07-13 20:42:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:47,549 INFO L225 Difference]: With dead ends: 3064 [2021-07-13 20:42:47,550 INFO L226 Difference]: Without dead ends: 3049 [2021-07-13 20:42:47,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3557.2ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:42:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-13 20:42:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2147. [2021-07-13 20:42:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.428238583410997) internal successors, (7357), 2146 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7357 transitions. [2021-07-13 20:42:47,580 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7357 transitions. Word has length 26 [2021-07-13 20:42:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:47,580 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7357 transitions. [2021-07-13 20:42:47,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7357 transitions. [2021-07-13 20:42:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:47,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:47,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:47,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3648 [2021-07-13 20:42:47,783 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 54 times [2021-07-13 20:42:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:47,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95301730] [2021-07-13 20:42:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:48,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95301730] [2021-07-13 20:42:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95301730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719421591] [2021-07-13 20:42:48,140 INFO L93 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 [2021-07-13 20:42:48,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:48,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:42:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:48,517 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-13 20:42:48,567 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_426, v_prenex_425], 6=[A, v_prenex_427]} [2021-07-13 20:42:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:48,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:42:48,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,596 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:42:48,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:42:48,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,729 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-13 20:42:48,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:48,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-07-13 20:42:48,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,758 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:42:48,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:42:48,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,879 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:42:48,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:48,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:48,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:48,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 20:42:48,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,909 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:42:48,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-13 20:42:48,911 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:49,018 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:42:49,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:49,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:49,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:49,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:49,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 20:42:49,035 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:49,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:49,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:49,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 20:42:49,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:49,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:49,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:42:49,148 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:409, output treesize:246 [2021-07-13 20:42:49,300 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-07-13 20:42:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:49,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719421591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:49,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:49,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:42:49,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648246237] [2021-07-13 20:42:49,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:49,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:49,388 INFO L87 Difference]: Start difference. First operand 2147 states and 7357 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,079 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:42:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:50,852 INFO L93 Difference]: Finished difference Result 2844 states and 9528 transitions. [2021-07-13 20:42:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:42:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:50,857 INFO L225 Difference]: With dead ends: 2844 [2021-07-13 20:42:50,857 INFO L226 Difference]: Without dead ends: 2819 [2021-07-13 20:42:50,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1780.5ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:42:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-07-13 20:42:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2143. [2021-07-13 20:42:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.429971988795518) internal successors, (7347), 2142 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7347 transitions. [2021-07-13 20:42:50,888 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7347 transitions. Word has length 26 [2021-07-13 20:42:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:50,888 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7347 transitions. [2021-07-13 20:42:50,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7347 transitions. [2021-07-13 20:42:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:50,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:50,891 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:51,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3694 [2021-07-13 20:42:51,092 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-13 20:42:51,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:51,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726628460] [2021-07-13 20:42:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:51,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726628460] [2021-07-13 20:42:51,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726628460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598972958] [2021-07-13 20:42:51,410 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 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 [2021-07-13 20:42:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:51,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:42:51,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:42:51,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:42:51,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:42:51,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:42:51,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:42:51,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:42:51,952 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:42:51,959 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:42:51,966 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:42:51,973 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:42:51,980 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:42:51,986 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:42:51,993 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:51,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:51,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:51,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:42:51,999 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:52,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:42:52,003 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:52,025 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:42:52,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:42:52,026 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:42:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:52,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598972958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:52,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:52,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:42:52,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251004224] [2021-07-13 20:42:52,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:52,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:52,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:52,041 INFO L87 Difference]: Start difference. First operand 2143 states and 7347 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:53,314 INFO L93 Difference]: Finished difference Result 2873 states and 9612 transitions. [2021-07-13 20:42:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:53,319 INFO L225 Difference]: With dead ends: 2873 [2021-07-13 20:42:53,319 INFO L226 Difference]: Without dead ends: 2851 [2021-07-13 20:42:53,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1269.5ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:42:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-07-13 20:42:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2169. [2021-07-13 20:42:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.4321955719557193) internal successors, (7441), 2168 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7441 transitions. [2021-07-13 20:42:53,349 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7441 transitions. Word has length 26 [2021-07-13 20:42:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:53,350 INFO L482 AbstractCegarLoop]: Abstraction has 2169 states and 7441 transitions. [2021-07-13 20:42:53,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7441 transitions. [2021-07-13 20:42:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:53,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:53,352 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:53,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3715 [2021-07-13 20:42:53,553 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-13 20:42:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402051276] [2021-07-13 20:42:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:53,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:53,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402051276] [2021-07-13 20:42:53,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402051276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:53,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320034282] [2021-07-13 20:42:53,792 INFO L93 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 [2021-07-13 20:42:53,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:53,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:54,107 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:42:54,154 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_428, v_prenex_432], 5=[A, v_prenex_430]} [2021-07-13 20:42:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:54,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:54,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:42:54,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:54,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:42:54,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,246 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.6 percent of original size [2021-07-13 20:42:54,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-07-13 20:42:54,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:54,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:42:54,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:54,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:42:54,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:54,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:42:54,308 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:33 [2021-07-13 20:42:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:54,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320034282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:54,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:42:54,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957022921] [2021-07-13 20:42:54,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:54,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:54,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:54,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:54,364 INFO L87 Difference]: Start difference. First operand 2169 states and 7441 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:55,800 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:42:55,919 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:42:56,059 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:42:56,203 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:42:56,331 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-13 20:42:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:56,565 INFO L93 Difference]: Finished difference Result 3222 states and 10652 transitions. [2021-07-13 20:42:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:42:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:56,571 INFO L225 Difference]: With dead ends: 3222 [2021-07-13 20:42:56,571 INFO L226 Difference]: Without dead ends: 3182 [2021-07-13 20:42:56,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2228.4ms TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:42:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-13 20:42:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2156. [2021-07-13 20:42:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.432018561484919) internal successors, (7396), 2155 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7396 transitions. [2021-07-13 20:42:56,602 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7396 transitions. Word has length 26 [2021-07-13 20:42:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:56,602 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7396 transitions. [2021-07-13 20:42:56,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7396 transitions. [2021-07-13 20:42:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:56,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:56,605 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:56,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3821,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:56,806 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:56,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 55 times [2021-07-13 20:42:56,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:56,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049490042] [2021-07-13 20:42:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049490042] [2021-07-13 20:42:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049490042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366909370] [2021-07-13 20:42:57,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:42:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:42:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:57,606 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:42:57,838 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-13 20:42:57,891 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_443, v_prenex_444], 2=[A, v_prenex_445]} [2021-07-13 20:42:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:42:57,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,002 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:42:58,002 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.3 percent of original size [2021-07-13 20:42:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:58,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:58,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:58,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:58,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:58,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:58,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:58,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:42:58,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:58,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:42:58,139 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:207, output treesize:51 [2021-07-13 20:42:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:58,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366909370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:58,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:42:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209672453] [2021-07-13 20:42:58,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:58,192 INFO L87 Difference]: Start difference. First operand 2156 states and 7396 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,076 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-13 20:42:59,459 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-07-13 20:42:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:59,604 INFO L93 Difference]: Finished difference Result 2279 states and 7717 transitions. [2021-07-13 20:42:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:59,608 INFO L225 Difference]: With dead ends: 2279 [2021-07-13 20:42:59,608 INFO L226 Difference]: Without dead ends: 2264 [2021-07-13 20:42:59,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1841.9ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:42:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-13 20:42:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2159. [2021-07-13 20:42:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.4300278035217793) internal successors, (7402), 2158 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7402 transitions. [2021-07-13 20:42:59,635 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7402 transitions. Word has length 26 [2021-07-13 20:42:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:59,635 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 7402 transitions. [2021-07-13 20:42:59,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7402 transitions. [2021-07-13 20:42:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:59,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:59,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:59,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3835,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:59,838 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash 16138506, now seen corresponding path program 56 times [2021-07-13 20:42:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:59,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796733270] [2021-07-13 20:42:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:00,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:00,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796733270] [2021-07-13 20:43:00,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796733270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:00,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813847433] [2021-07-13 20:43:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:00,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:00,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:43:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:00,597 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:43:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:00,654 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:00,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:43:00,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:00,759 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:43:00,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:00,772 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:00,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:43:00,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:00,874 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:43:00,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:00,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:00,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:43:00,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:00,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:01,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:43:01,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:01,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:01,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:43:01,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:01,213 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:43:01,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:01,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:43:01,226 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:01,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:01,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:43:01,330 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:01,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:01,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:43:01,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:01,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:01,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:43:01,516 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:43:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813847433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:01,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:43:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625243805] [2021-07-13 20:43:01,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:43:01,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:43:01,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:01,686 INFO L87 Difference]: Start difference. First operand 2159 states and 7402 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:01,981 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:43:02,756 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:43:03,215 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:43:03,517 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-07-13 20:43:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:03,722 INFO L93 Difference]: Finished difference Result 3021 states and 10110 transitions. [2021-07-13 20:43:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:43:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:43:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:03,727 INFO L225 Difference]: With dead ends: 3021 [2021-07-13 20:43:03,727 INFO L226 Difference]: Without dead ends: 3006 [2021-07-13 20:43:03,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2283.6ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:43:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-07-13 20:43:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2153. [2021-07-13 20:43:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.427973977695167) internal successors, (7377), 2152 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7377 transitions. [2021-07-13 20:43:03,759 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7377 transitions. Word has length 26 [2021-07-13 20:43:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:03,759 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7377 transitions. [2021-07-13 20:43:03,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7377 transitions. [2021-07-13 20:43:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:03,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:03,762 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:03,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-07-13 20:43:03,964 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-07-13 20:43:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:03,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104070108] [2021-07-13 20:43:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104070108] [2021-07-13 20:43:04,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104070108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017543278] [2021-07-13 20:43:04,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:43:04,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:43:04,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:04,711 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_469], 3=[v_prenex_467, v_prenex_468]} [2021-07-13 20:43:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:04,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:43:04,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:04,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:04,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:43:04,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:04,875 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:43:04,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:04,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:04,889 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:04,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:43:04,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:04,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:04,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:43:04,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,026 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:43:05,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:43:05,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,065 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:43:05,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:43:05,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,177 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:43:05,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,189 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:43:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:43:05,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:05,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:43:05,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:43:05,304 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:365, output treesize:194 [2021-07-13 20:43:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:05,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017543278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:05,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:05,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:43:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214670708] [2021-07-13 20:43:05,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:43:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:43:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:05,482 INFO L87 Difference]: Start difference. First operand 2153 states and 7377 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:06,685 INFO L93 Difference]: Finished difference Result 2848 states and 9544 transitions. [2021-07-13 20:43:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:43:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:43:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:06,690 INFO L225 Difference]: With dead ends: 2848 [2021-07-13 20:43:06,690 INFO L226 Difference]: Without dead ends: 2823 [2021-07-13 20:43:06,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1417.3ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:43:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-07-13 20:43:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2129. [2021-07-13 20:43:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-07-13 20:43:06,719 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-07-13 20:43:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:06,719 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-07-13 20:43:06,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-07-13 20:43:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:06,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:06,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:06,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:06,924 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-13 20:43:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826042527] [2021-07-13 20:43:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:07,207 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 20:43:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:07,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826042527] [2021-07-13 20:43:07,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826042527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061792182] [2021-07-13 20:43:07,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:07,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:43:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:07,638 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:43:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:07,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:07,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:43:07,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:07,772 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:43:07,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:07,894 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:43:07,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:07,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:07,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:43:07,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:07,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:07,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:07,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:43:07,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,033 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:43:08,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:08,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,045 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:08,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:43:08,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:43:08,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,160 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:43:08,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:08,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:08,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:43:08,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:43:08,184 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:08,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:43:08,281 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-13 20:43:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061792182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:08,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:43:08,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360096193] [2021-07-13 20:43:08,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:43:08,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:08,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:43:08,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:08,453 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,397 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:43:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:09,441 INFO L93 Difference]: Finished difference Result 2750 states and 9269 transitions. [2021-07-13 20:43:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:43:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:09,446 INFO L225 Difference]: With dead ends: 2750 [2021-07-13 20:43:09,446 INFO L226 Difference]: Without dead ends: 2735 [2021-07-13 20:43:09,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1387.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-07-13 20:43:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2129. [2021-07-13 20:43:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-07-13 20:43:09,475 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-07-13 20:43:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-07-13 20:43:09,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-07-13 20:43:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:09,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:09,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:09,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:09,679 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1496131378, now seen corresponding path program 63 times [2021-07-13 20:43:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:09,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210229741] [2021-07-13 20:43:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:09,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210229741] [2021-07-13 20:43:09,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210229741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947368249] [2021-07-13 20:43:09,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:43:10,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:10,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:43:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,530 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:43:10,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:43:10,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,556 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:43:10,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-13 20:43:10,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,583 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:43:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:43:10,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,609 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:43:10,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:43:10,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,634 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:43:10,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-13 20:43:10,635 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,657 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:43:10,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:43:10,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:10,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:43:10,687 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,712 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:43:10,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:43:10,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:10,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:43:10,743 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,757 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:43:10,758 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,784 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:43:10,785 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,799 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:43:10,799 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,813 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:43:10,814 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,828 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:43:10,828 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,841 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:43:10,842 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:10,849 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:43:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:43:10,850 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,986 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-07-13 20:43:10,987 INFO L628 ElimStorePlain]: treesize reduction 140, result has 39.9 percent of original size [2021-07-13 20:43:10,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:43:10,989 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-07-13 20:43:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:11,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947368249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:11,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:11,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:43:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691178288] [2021-07-13 20:43:11,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:43:11,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:43:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:11,084 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,331 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 20:43:13,614 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-13 20:43:13,815 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 20:43:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:13,915 INFO L93 Difference]: Finished difference Result 3313 states and 10903 transitions. [2021-07-13 20:43:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:43:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:43:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:13,921 INFO L225 Difference]: With dead ends: 3313 [2021-07-13 20:43:13,921 INFO L226 Difference]: Without dead ends: 3269 [2021-07-13 20:43:13,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2734.1ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:43:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-07-13 20:43:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2147. [2021-07-13 20:43:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.4221808014911463) internal successors, (7344), 2146 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7344 transitions. [2021-07-13 20:43:13,955 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7344 transitions. Word has length 26 [2021-07-13 20:43:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:13,955 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7344 transitions. [2021-07-13 20:43:13,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7344 transitions. [2021-07-13 20:43:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:13,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:13,958 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:14,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3930,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:14,158 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-13 20:43:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:14,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746500114] [2021-07-13 20:43:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:14,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746500114] [2021-07-13 20:43:14,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746500114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780391507] [2021-07-13 20:43:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:43:14,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:14,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:14,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:14,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780391507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:14,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:14,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:43:14,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607107817] [2021-07-13 20:43:14,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:14,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:14,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:14,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:14,312 INFO L87 Difference]: Start difference. First operand 2147 states and 7344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:15,174 INFO L93 Difference]: Finished difference Result 5131 states and 15966 transitions. [2021-07-13 20:43:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:43:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:15,183 INFO L225 Difference]: With dead ends: 5131 [2021-07-13 20:43:15,183 INFO L226 Difference]: Without dead ends: 5131 [2021-07-13 20:43:15,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:43:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-07-13 20:43:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2340. [2021-07-13 20:43:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.469431380932022) internal successors, (8115), 2339 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8115 transitions. [2021-07-13 20:43:15,231 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8115 transitions. Word has length 28 [2021-07-13 20:43:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:15,231 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 8115 transitions. [2021-07-13 20:43:15,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8115 transitions. [2021-07-13 20:43:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:15,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:15,234 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:15,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:15,435 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-13 20:43:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:15,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425481114] [2021-07-13 20:43:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:15,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425481114] [2021-07-13 20:43:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425481114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255480528] [2021-07-13 20:43:15,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:15,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:15,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:15,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255480528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:15,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:43:15,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293032584] [2021-07-13 20:43:15,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:15,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:15,600 INFO L87 Difference]: Start difference. First operand 2340 states and 8115 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:16,745 INFO L93 Difference]: Finished difference Result 6763 states and 20717 transitions. [2021-07-13 20:43:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:43:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:16,757 INFO L225 Difference]: With dead ends: 6763 [2021-07-13 20:43:16,757 INFO L226 Difference]: Without dead ends: 6763 [2021-07-13 20:43:16,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:43:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-07-13 20:43:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 2351. [2021-07-13 20:43:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 3.4761702127659575) internal successors, (8169), 2350 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 8169 transitions. [2021-07-13 20:43:16,819 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 8169 transitions. Word has length 28 [2021-07-13 20:43:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:16,819 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 8169 transitions. [2021-07-13 20:43:16,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 8169 transitions. [2021-07-13 20:43:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:16,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:16,822 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:17,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4062 [2021-07-13 20:43:17,022 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-13 20:43:17,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:17,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426302903] [2021-07-13 20:43:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:17,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:17,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426302903] [2021-07-13 20:43:17,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426302903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:17,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862997930] [2021-07-13 20:43:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:43:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862997930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:17,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:17,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:43:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911360432] [2021-07-13 20:43:17,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:17,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:17,179 INFO L87 Difference]: Start difference. First operand 2351 states and 8169 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:18,293 INFO L93 Difference]: Finished difference Result 6150 states and 19231 transitions. [2021-07-13 20:43:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:43:18,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:18,304 INFO L225 Difference]: With dead ends: 6150 [2021-07-13 20:43:18,304 INFO L226 Difference]: Without dead ends: 6150 [2021-07-13 20:43:18,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:43:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2021-07-13 20:43:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 2299. [2021-07-13 20:43:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.4538729329852047) internal successors, (7937), 2298 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7937 transitions. [2021-07-13 20:43:18,359 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7937 transitions. Word has length 28 [2021-07-13 20:43:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:18,359 INFO L482 AbstractCegarLoop]: Abstraction has 2299 states and 7937 transitions. [2021-07-13 20:43:18,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7937 transitions. [2021-07-13 20:43:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:18,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:18,362 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:18,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-13 20:43:18,566 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:18,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-13 20:43:18,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:18,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8046222] [2021-07-13 20:43:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:18,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:18,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8046222] [2021-07-13 20:43:18,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8046222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:18,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443517259] [2021-07-13 20:43:18,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:43:18,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:18,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:18,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:18,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443517259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:18,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:18,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:43:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453438845] [2021-07-13 20:43:18,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:18,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:18,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:18,715 INFO L87 Difference]: Start difference. First operand 2299 states and 7937 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:19,682 INFO L93 Difference]: Finished difference Result 5206 states and 16106 transitions. [2021-07-13 20:43:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:43:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:19,692 INFO L225 Difference]: With dead ends: 5206 [2021-07-13 20:43:19,692 INFO L226 Difference]: Without dead ends: 5206 [2021-07-13 20:43:19,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:43:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-07-13 20:43:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 2309. [2021-07-13 20:43:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.450173310225303) internal successors, (7963), 2308 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7963 transitions. [2021-07-13 20:43:19,745 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7963 transitions. Word has length 28 [2021-07-13 20:43:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:19,745 INFO L482 AbstractCegarLoop]: Abstraction has 2309 states and 7963 transitions. [2021-07-13 20:43:19,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7963 transitions. [2021-07-13 20:43:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:19,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:19,748 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:19,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-13 20:43:19,949 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 64 times [2021-07-13 20:43:19,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:19,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943460583] [2021-07-13 20:43:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:19,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:19,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943460583] [2021-07-13 20:43:19,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943460583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:19,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065275618] [2021-07-13 20:43:19,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:20,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:20,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:20,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:20,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065275618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:20,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:43:20,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535616585] [2021-07-13 20:43:20,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:20,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:20,114 INFO L87 Difference]: Start difference. First operand 2309 states and 7963 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:20,656 INFO L93 Difference]: Finished difference Result 4633 states and 14522 transitions. [2021-07-13 20:43:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:43:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:20,664 INFO L225 Difference]: With dead ends: 4633 [2021-07-13 20:43:20,664 INFO L226 Difference]: Without dead ends: 4633 [2021-07-13 20:43:20,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:43:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-07-13 20:43:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 2379. [2021-07-13 20:43:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.433978132884777) internal successors, (8166), 2378 states have internal predecessors, (8166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8166 transitions. [2021-07-13 20:43:20,708 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8166 transitions. Word has length 28 [2021-07-13 20:43:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:20,708 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8166 transitions. [2021-07-13 20:43:20,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8166 transitions. [2021-07-13 20:43:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:20,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:20,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:20,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-13 20:43:20,912 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-13 20:43:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:20,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276340380] [2021-07-13 20:43:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:20,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:20,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276340380] [2021-07-13 20:43:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276340380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475116728] [2021-07-13 20:43:20,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:43:20,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:20,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:21,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475116728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:21,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:21,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:43:21,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046854160] [2021-07-13 20:43:21,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:21,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:21,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:21,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:21,022 INFO L87 Difference]: Start difference. First operand 2379 states and 8166 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:21,185 INFO L93 Difference]: Finished difference Result 3856 states and 12614 transitions. [2021-07-13 20:43:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:21,192 INFO L225 Difference]: With dead ends: 3856 [2021-07-13 20:43:21,192 INFO L226 Difference]: Without dead ends: 3832 [2021-07-13 20:43:21,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-07-13 20:43:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2739. [2021-07-13 20:43:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 3.50036523009496) internal successors, (9584), 2738 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 9584 transitions. [2021-07-13 20:43:21,248 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 9584 transitions. Word has length 28 [2021-07-13 20:43:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:21,248 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 9584 transitions. [2021-07-13 20:43:21,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 9584 transitions. [2021-07-13 20:43:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:21,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:21,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:21,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-13 20:43:21,452 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-13 20:43:21,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:21,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241259039] [2021-07-13 20:43:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:21,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:21,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241259039] [2021-07-13 20:43:21,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241259039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:21,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895175522] [2021-07-13 20:43:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:21,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:21,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:21,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895175522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:21,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:21,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:21,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185949223] [2021-07-13 20:43:21,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:21,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:21,586 INFO L87 Difference]: Start difference. First operand 2739 states and 9584 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:43:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:22,146 INFO L93 Difference]: Finished difference Result 4478 states and 14368 transitions. [2021-07-13 20:43:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:43:22,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:43:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:22,153 INFO L225 Difference]: With dead ends: 4478 [2021-07-13 20:43:22,154 INFO L226 Difference]: Without dead ends: 4431 [2021-07-13 20:43:22,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:43:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-07-13 20:43:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2904. [2021-07-13 20:43:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 3.5177402686875645) internal successors, (10212), 2903 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 10212 transitions. [2021-07-13 20:43:22,204 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 10212 transitions. Word has length 28 [2021-07-13 20:43:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:22,204 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 10212 transitions. [2021-07-13 20:43:22,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:43:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 10212 transitions. [2021-07-13 20:43:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:22,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:22,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:22,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-13 20:43:22,409 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-13 20:43:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620762303] [2021-07-13 20:43:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620762303] [2021-07-13 20:43:22,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620762303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110403204] [2021-07-13 20:43:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:22,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:22,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:22,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110403204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:22,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:22,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138521906] [2021-07-13 20:43:22,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:22,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:22,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:22,544 INFO L87 Difference]: Start difference. First operand 2904 states and 10212 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:23,214 INFO L93 Difference]: Finished difference Result 4785 states and 15055 transitions. [2021-07-13 20:43:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:43:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:23,222 INFO L225 Difference]: With dead ends: 4785 [2021-07-13 20:43:23,222 INFO L226 Difference]: Without dead ends: 4759 [2021-07-13 20:43:23,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-07-13 20:43:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2922. [2021-07-13 20:43:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.5217391304347827) internal successors, (10287), 2921 states have internal predecessors, (10287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10287 transitions. [2021-07-13 20:43:23,281 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10287 transitions. Word has length 28 [2021-07-13 20:43:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:23,281 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10287 transitions. [2021-07-13 20:43:23,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10287 transitions. [2021-07-13 20:43:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:23,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:23,285 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:23,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-13 20:43:23,486 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-13 20:43:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:23,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26621026] [2021-07-13 20:43:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:23,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26621026] [2021-07-13 20:43:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26621026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173573905] [2021-07-13 20:43:23,518 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 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 [2021-07-13 20:43:23,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:23,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:23,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173573905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:23,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:23,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737096268] [2021-07-13 20:43:23,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:23,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:23,622 INFO L87 Difference]: Start difference. First operand 2922 states and 10287 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:24,242 INFO L93 Difference]: Finished difference Result 4783 states and 15074 transitions. [2021-07-13 20:43:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:43:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:24,250 INFO L225 Difference]: With dead ends: 4783 [2021-07-13 20:43:24,250 INFO L226 Difference]: Without dead ends: 4771 [2021-07-13 20:43:24,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2021-07-13 20:43:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2922. [2021-07-13 20:43:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.515576857240671) internal successors, (10269), 2921 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10269 transitions. [2021-07-13 20:43:24,306 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10269 transitions. Word has length 28 [2021-07-13 20:43:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:24,307 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10269 transitions. [2021-07-13 20:43:24,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10269 transitions. [2021-07-13 20:43:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:24,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:24,311 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:24,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:24,511 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-13 20:43:24,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:24,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531389806] [2021-07-13 20:43:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:24,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531389806] [2021-07-13 20:43:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531389806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136435708] [2021-07-13 20:43:24,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:43:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:24,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136435708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:24,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:24,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163037737] [2021-07-13 20:43:24,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:24,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:24,626 INFO L87 Difference]: Start difference. First operand 2922 states and 10269 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:25,150 INFO L93 Difference]: Finished difference Result 5554 states and 17878 transitions. [2021-07-13 20:43:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:43:25,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:25,159 INFO L225 Difference]: With dead ends: 5554 [2021-07-13 20:43:25,159 INFO L226 Difference]: Without dead ends: 5507 [2021-07-13 20:43:25,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:43:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-13 20:43:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3068. [2021-07-13 20:43:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.5598304532116076) internal successors, (10918), 3067 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10918 transitions. [2021-07-13 20:43:25,219 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10918 transitions. Word has length 28 [2021-07-13 20:43:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:25,219 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10918 transitions. [2021-07-13 20:43:25,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10918 transitions. [2021-07-13 20:43:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:25,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:25,224 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:25,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:25,424 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-13 20:43:25,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:25,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535142771] [2021-07-13 20:43:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:25,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:25,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535142771] [2021-07-13 20:43:25,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535142771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193416623] [2021-07-13 20:43:25,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:25,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193416623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:25,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:43:25,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320307893] [2021-07-13 20:43:25,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:43:25,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:43:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:43:25,525 INFO L87 Difference]: Start difference. First operand 3068 states and 10918 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-13 20:43:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:25,675 INFO L93 Difference]: Finished difference Result 4356 states and 14401 transitions. [2021-07-13 20:43:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-07-13 20:43:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:25,683 INFO L225 Difference]: With dead ends: 4356 [2021-07-13 20:43:25,683 INFO L226 Difference]: Without dead ends: 4356 [2021-07-13 20:43:25,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-07-13 20:43:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 2879. [2021-07-13 20:43:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.5295343988881167) internal successors, (10158), 2878 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10158 transitions. [2021-07-13 20:43:25,730 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10158 transitions. Word has length 28 [2021-07-13 20:43:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:25,730 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10158 transitions. [2021-07-13 20:43:25,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-13 20:43:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10158 transitions. [2021-07-13 20:43:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:25,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:25,734 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:25,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4071 [2021-07-13 20:43:25,935 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-13 20:43:25,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:25,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046756481] [2021-07-13 20:43:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:25,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046756481] [2021-07-13 20:43:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046756481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906646897] [2021-07-13 20:43:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:25,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:43:25,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:26,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906646897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:26,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:26,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:26,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253328904] [2021-07-13 20:43:26,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:26,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:26,057 INFO L87 Difference]: Start difference. First operand 2879 states and 10158 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:26,701 INFO L93 Difference]: Finished difference Result 6267 states and 19847 transitions. [2021-07-13 20:43:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:43:26,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:43:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:26,712 INFO L225 Difference]: With dead ends: 6267 [2021-07-13 20:43:26,713 INFO L226 Difference]: Without dead ends: 6267 [2021-07-13 20:43:26,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-07-13 20:43:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 2897. [2021-07-13 20:43:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.5293508287292816) internal successors, (10221), 2896 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 10221 transitions. [2021-07-13 20:43:26,778 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 10221 transitions. Word has length 28 [2021-07-13 20:43:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:26,778 INFO L482 AbstractCegarLoop]: Abstraction has 2897 states and 10221 transitions. [2021-07-13 20:43:26,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 10221 transitions. [2021-07-13 20:43:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:26,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:26,782 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:26,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-07-13 20:43:26,982 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-13 20:43:26,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:26,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935223489] [2021-07-13 20:43:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:27,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:27,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935223489] [2021-07-13 20:43:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935223489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371936418] [2021-07-13 20:43:27,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:27,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:27,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:27,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:27,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371936418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:27,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:27,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:27,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514979989] [2021-07-13 20:43:27,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:27,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:27,114 INFO L87 Difference]: Start difference. First operand 2897 states and 10221 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:27,795 INFO L93 Difference]: Finished difference Result 6510 states and 20600 transitions. [2021-07-13 20:43:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:43:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:43:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:27,806 INFO L225 Difference]: With dead ends: 6510 [2021-07-13 20:43:27,806 INFO L226 Difference]: Without dead ends: 6510 [2021-07-13 20:43:27,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:43:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-07-13 20:43:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 2991. [2021-07-13 20:43:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5210702341137123) internal successors, (10528), 2990 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10528 transitions. [2021-07-13 20:43:27,875 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10528 transitions. Word has length 28 [2021-07-13 20:43:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:27,875 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10528 transitions. [2021-07-13 20:43:27,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10528 transitions. [2021-07-13 20:43:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:27,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:27,879 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:28,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:28,080 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-13 20:43:28,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:28,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942437809] [2021-07-13 20:43:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:28,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:28,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942437809] [2021-07-13 20:43:28,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942437809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357702043] [2021-07-13 20:43:28,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:28,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:28,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357702043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:28,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:28,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799162600] [2021-07-13 20:43:28,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:28,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:28,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:28,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:28,194 INFO L87 Difference]: Start difference. First operand 2991 states and 10528 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:28,764 INFO L93 Difference]: Finished difference Result 6652 states and 21097 transitions. [2021-07-13 20:43:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:43:28,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:28,776 INFO L225 Difference]: With dead ends: 6652 [2021-07-13 20:43:28,776 INFO L226 Difference]: Without dead ends: 6616 [2021-07-13 20:43:28,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:43:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-07-13 20:43:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 3393. [2021-07-13 20:43:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.5474646226415096) internal successors, (12033), 3392 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12033 transitions. [2021-07-13 20:43:28,848 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12033 transitions. Word has length 28 [2021-07-13 20:43:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:28,848 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12033 transitions. [2021-07-13 20:43:28,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12033 transitions. [2021-07-13 20:43:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:28,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:28,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:29,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-07-13 20:43:29,054 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-13 20:43:29,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:29,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031138662] [2021-07-13 20:43:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:29,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:29,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031138662] [2021-07-13 20:43:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031138662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:29,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358454919] [2021-07-13 20:43:29,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:43:29,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:29,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358454919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:29,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:29,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:29,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067205862] [2021-07-13 20:43:29,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:29,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:29,182 INFO L87 Difference]: Start difference. First operand 3393 states and 12033 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:29,719 INFO L93 Difference]: Finished difference Result 6827 states and 21583 transitions. [2021-07-13 20:43:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:43:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:29,732 INFO L225 Difference]: With dead ends: 6827 [2021-07-13 20:43:29,732 INFO L226 Difference]: Without dead ends: 6827 [2021-07-13 20:43:29,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:43:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2021-07-13 20:43:29,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 3104. [2021-07-13 20:43:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 3.5078955849178213) internal successors, (10885), 3103 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 10885 transitions. [2021-07-13 20:43:29,827 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 10885 transitions. Word has length 28 [2021-07-13 20:43:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:29,827 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 10885 transitions. [2021-07-13 20:43:29,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 10885 transitions. [2021-07-13 20:43:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:29,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:29,832 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:30,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-07-13 20:43:30,032 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-13 20:43:30,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:30,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650610425] [2021-07-13 20:43:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:30,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650610425] [2021-07-13 20:43:30,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650610425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341123470] [2021-07-13 20:43:30,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:43:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:30,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341123470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:30,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:30,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774253231] [2021-07-13 20:43:30,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:30,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:30,147 INFO L87 Difference]: Start difference. First operand 3104 states and 10885 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:30,742 INFO L93 Difference]: Finished difference Result 5999 states and 19332 transitions. [2021-07-13 20:43:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:43:30,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:43:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:30,754 INFO L225 Difference]: With dead ends: 5999 [2021-07-13 20:43:30,754 INFO L226 Difference]: Without dead ends: 5995 [2021-07-13 20:43:30,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:43:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-07-13 20:43:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 2864. [2021-07-13 20:43:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2863 states have (on average 3.5337059028990567) internal successors, (10117), 2863 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10117 transitions. [2021-07-13 20:43:30,817 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10117 transitions. Word has length 28 [2021-07-13 20:43:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:30,817 INFO L482 AbstractCegarLoop]: Abstraction has 2864 states and 10117 transitions. [2021-07-13 20:43:30,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10117 transitions. [2021-07-13 20:43:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:30,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:30,821 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:31,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-13 20:43:31,021 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-13 20:43:31,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:31,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981728300] [2021-07-13 20:43:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:31,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:31,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981728300] [2021-07-13 20:43:31,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981728300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763550617] [2021-07-13 20:43:31,072 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 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 [2021-07-13 20:43:31,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:31,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763550617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:31,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:31,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819791573] [2021-07-13 20:43:31,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:31,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:31,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:31,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:31,193 INFO L87 Difference]: Start difference. First operand 2864 states and 10117 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:32,167 INFO L93 Difference]: Finished difference Result 9242 states and 30126 transitions. [2021-07-13 20:43:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:43:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:32,186 INFO L225 Difference]: With dead ends: 9242 [2021-07-13 20:43:32,186 INFO L226 Difference]: Without dead ends: 9242 [2021-07-13 20:43:32,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:43:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-07-13 20:43:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 3043. [2021-07-13 20:43:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.6058514135437214) internal successors, (10969), 3042 states have internal predecessors, (10969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10969 transitions. [2021-07-13 20:43:32,285 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10969 transitions. Word has length 28 [2021-07-13 20:43:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:32,286 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 10969 transitions. [2021-07-13 20:43:32,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10969 transitions. [2021-07-13 20:43:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:32,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:32,304 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:32,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-13 20:43:32,505 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-13 20:43:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:32,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550282568] [2021-07-13 20:43:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:32,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:32,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550282568] [2021-07-13 20:43:32,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550282568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:32,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100197325] [2021-07-13 20:43:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:32,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100197325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:32,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:32,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:32,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681637887] [2021-07-13 20:43:32,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:32,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:32,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:32,645 INFO L87 Difference]: Start difference. First operand 3043 states and 10969 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:33,568 INFO L93 Difference]: Finished difference Result 9069 states and 29656 transitions. [2021-07-13 20:43:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:43:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:33,586 INFO L225 Difference]: With dead ends: 9069 [2021-07-13 20:43:33,586 INFO L226 Difference]: Without dead ends: 9069 [2021-07-13 20:43:33,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:43:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9069 states. [2021-07-13 20:43:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9069 to 3012. [2021-07-13 20:43:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.5888409166389903) internal successors, (10806), 3011 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 10806 transitions. [2021-07-13 20:43:33,707 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 10806 transitions. Word has length 28 [2021-07-13 20:43:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:33,707 INFO L482 AbstractCegarLoop]: Abstraction has 3012 states and 10806 transitions. [2021-07-13 20:43:33,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 10806 transitions. [2021-07-13 20:43:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:33,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:33,712 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:33,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-13 20:43:33,912 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-13 20:43:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:33,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835225373] [2021-07-13 20:43:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:33,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:33,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835225373] [2021-07-13 20:43:33,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835225373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364914486] [2021-07-13 20:43:33,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:33,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:33,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:33,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:33,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:34,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364914486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:34,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:34,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530268452] [2021-07-13 20:43:34,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:34,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:34,042 INFO L87 Difference]: Start difference. First operand 3012 states and 10806 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:34,876 INFO L93 Difference]: Finished difference Result 8513 states and 26929 transitions. [2021-07-13 20:43:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:43:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:34,892 INFO L225 Difference]: With dead ends: 8513 [2021-07-13 20:43:34,893 INFO L226 Difference]: Without dead ends: 8513 [2021-07-13 20:43:34,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:43:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2021-07-13 20:43:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 3032. [2021-07-13 20:43:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5922137908281093) internal successors, (10888), 3031 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10888 transitions. [2021-07-13 20:43:34,980 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10888 transitions. Word has length 28 [2021-07-13 20:43:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:34,981 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 10888 transitions. [2021-07-13 20:43:34,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10888 transitions. [2021-07-13 20:43:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:34,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:34,985 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:35,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-13 20:43:35,185 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-13 20:43:35,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:35,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594042467] [2021-07-13 20:43:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:35,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594042467] [2021-07-13 20:43:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594042467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701821672] [2021-07-13 20:43:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:35,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:35,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:35,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701821672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:35,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:35,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402145078] [2021-07-13 20:43:35,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:35,323 INFO L87 Difference]: Start difference. First operand 3032 states and 10888 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:36,119 INFO L93 Difference]: Finished difference Result 8020 states and 25736 transitions. [2021-07-13 20:43:36,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:43:36,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:36,135 INFO L225 Difference]: With dead ends: 8020 [2021-07-13 20:43:36,135 INFO L226 Difference]: Without dead ends: 8012 [2021-07-13 20:43:36,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:43:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-07-13 20:43:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3014. [2021-07-13 20:43:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5881181546631264) internal successors, (10811), 3013 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10811 transitions. [2021-07-13 20:43:36,219 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10811 transitions. Word has length 28 [2021-07-13 20:43:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:36,219 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10811 transitions. [2021-07-13 20:43:36,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10811 transitions. [2021-07-13 20:43:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:36,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:36,224 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:36,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:36,424 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:36,424 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-13 20:43:36,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:36,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013860003] [2021-07-13 20:43:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:36,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013860003] [2021-07-13 20:43:36,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013860003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480577366] [2021-07-13 20:43:36,455 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 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 [2021-07-13 20:43:36,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:43:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:36,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480577366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:36,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:36,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:36,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766615964] [2021-07-13 20:43:36,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:36,562 INFO L87 Difference]: Start difference. First operand 3014 states and 10811 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:37,455 INFO L93 Difference]: Finished difference Result 7945 states and 25505 transitions. [2021-07-13 20:43:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:43:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:37,470 INFO L225 Difference]: With dead ends: 7945 [2021-07-13 20:43:37,470 INFO L226 Difference]: Without dead ends: 7945 [2021-07-13 20:43:37,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:43:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-07-13 20:43:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3030. [2021-07-13 20:43:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.5902938263453286) internal successors, (10875), 3029 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 10875 transitions. [2021-07-13 20:43:37,552 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 10875 transitions. Word has length 28 [2021-07-13 20:43:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:37,552 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 10875 transitions. [2021-07-13 20:43:37,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 10875 transitions. [2021-07-13 20:43:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:37,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:37,556 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:37,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-07-13 20:43:37,756 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:37,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:37,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-13 20:43:37,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:37,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153283506] [2021-07-13 20:43:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:37,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:37,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153283506] [2021-07-13 20:43:37,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153283506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922178532] [2021-07-13 20:43:37,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:43:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:37,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922178532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:37,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:37,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417772503] [2021-07-13 20:43:37,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:37,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:37,889 INFO L87 Difference]: Start difference. First operand 3030 states and 10875 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:38,786 INFO L93 Difference]: Finished difference Result 7613 states and 24721 transitions. [2021-07-13 20:43:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:43:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:38,808 INFO L225 Difference]: With dead ends: 7613 [2021-07-13 20:43:38,808 INFO L226 Difference]: Without dead ends: 7605 [2021-07-13 20:43:38,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:43:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-07-13 20:43:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 2787. [2021-07-13 20:43:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.5078966259870783) internal successors, (9773), 2786 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9773 transitions. [2021-07-13 20:43:38,890 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9773 transitions. Word has length 28 [2021-07-13 20:43:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:38,890 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 9773 transitions. [2021-07-13 20:43:38,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9773 transitions. [2021-07-13 20:43:38,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:38,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:38,894 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:39,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:39,095 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-13 20:43:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:39,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530526896] [2021-07-13 20:43:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:39,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:39,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530526896] [2021-07-13 20:43:39,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530526896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:39,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679016086] [2021-07-13 20:43:39,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:39,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:39,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:39,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:39,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679016086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:39,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:39,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:43:39,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395270249] [2021-07-13 20:43:39,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:39,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:39,236 INFO L87 Difference]: Start difference. First operand 2787 states and 9773 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:40,054 INFO L93 Difference]: Finished difference Result 5810 states and 18592 transitions. [2021-07-13 20:43:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:43:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:40,065 INFO L225 Difference]: With dead ends: 5810 [2021-07-13 20:43:40,065 INFO L226 Difference]: Without dead ends: 5810 [2021-07-13 20:43:40,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:43:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-07-13 20:43:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 2799. [2021-07-13 20:43:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 3.506433166547534) internal successors, (9811), 2798 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 9811 transitions. [2021-07-13 20:43:40,123 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 9811 transitions. Word has length 28 [2021-07-13 20:43:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:40,123 INFO L482 AbstractCegarLoop]: Abstraction has 2799 states and 9811 transitions. [2021-07-13 20:43:40,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 9811 transitions. [2021-07-13 20:43:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:40,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:40,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:40,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-07-13 20:43:40,328 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-13 20:43:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:40,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672279762] [2021-07-13 20:43:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:40,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672279762] [2021-07-13 20:43:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672279762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982261936] [2021-07-13 20:43:40,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:43:40,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:43:40,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:40,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982261936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:40,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:43:40,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18921741] [2021-07-13 20:43:40,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:40,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:40,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:40,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:40,478 INFO L87 Difference]: Start difference. First operand 2799 states and 9811 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:41,438 INFO L93 Difference]: Finished difference Result 6586 states and 20579 transitions. [2021-07-13 20:43:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:43:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:41,451 INFO L225 Difference]: With dead ends: 6586 [2021-07-13 20:43:41,451 INFO L226 Difference]: Without dead ends: 6586 [2021-07-13 20:43:41,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:43:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-07-13 20:43:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 2865. [2021-07-13 20:43:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 3.5013966480446927) internal successors, (10028), 2864 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 10028 transitions. [2021-07-13 20:43:41,517 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 10028 transitions. Word has length 28 [2021-07-13 20:43:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:41,518 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 10028 transitions. [2021-07-13 20:43:41,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 10028 transitions. [2021-07-13 20:43:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:41,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:41,521 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:41,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4084,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:41,722 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:41,722 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-13 20:43:41,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:41,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96146993] [2021-07-13 20:43:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:41,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96146993] [2021-07-13 20:43:41,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96146993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730715040] [2021-07-13 20:43:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:41,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:41,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:41,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:41,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730715040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:41,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:41,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:43:41,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166994152] [2021-07-13 20:43:41,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:41,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:41,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:41,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:41,864 INFO L87 Difference]: Start difference. First operand 2865 states and 10028 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:42,757 INFO L93 Difference]: Finished difference Result 6152 states and 19441 transitions. [2021-07-13 20:43:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:43:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:42,768 INFO L225 Difference]: With dead ends: 6152 [2021-07-13 20:43:42,769 INFO L226 Difference]: Without dead ends: 6148 [2021-07-13 20:43:42,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:43:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-07-13 20:43:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 2791. [2021-07-13 20:43:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.4974910394265235) internal successors, (9758), 2790 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9758 transitions. [2021-07-13 20:43:42,833 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9758 transitions. Word has length 28 [2021-07-13 20:43:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:42,833 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9758 transitions. [2021-07-13 20:43:42,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9758 transitions. [2021-07-13 20:43:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:42,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:42,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:43,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-13 20:43:43,037 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:43,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 65 times [2021-07-13 20:43:43,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:43,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935331465] [2021-07-13 20:43:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:43,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:43,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935331465] [2021-07-13 20:43:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935331465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:43,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169868306] [2021-07-13 20:43:43,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:43,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:43,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169868306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:43,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:43,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:43,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307859407] [2021-07-13 20:43:43,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:43,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:43,171 INFO L87 Difference]: Start difference. First operand 2791 states and 9758 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:43,731 INFO L93 Difference]: Finished difference Result 5291 states and 17008 transitions. [2021-07-13 20:43:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:43:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:43,741 INFO L225 Difference]: With dead ends: 5291 [2021-07-13 20:43:43,741 INFO L226 Difference]: Without dead ends: 5291 [2021-07-13 20:43:43,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:43:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-07-13 20:43:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 2791. [2021-07-13 20:43:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.499641577060932) internal successors, (9764), 2790 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9764 transitions. [2021-07-13 20:43:43,795 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9764 transitions. Word has length 28 [2021-07-13 20:43:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:43,795 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9764 transitions. [2021-07-13 20:43:43,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9764 transitions. [2021-07-13 20:43:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:43,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:43,799 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:43,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:43,999 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 66 times [2021-07-13 20:43:43,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:43,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043679527] [2021-07-13 20:43:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:44,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043679527] [2021-07-13 20:43:44,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043679527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590156060] [2021-07-13 20:43:44,036 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 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 [2021-07-13 20:43:44,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:44,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:44,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590156060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:44,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094933720] [2021-07-13 20:43:44,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:44,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:44,142 INFO L87 Difference]: Start difference. First operand 2791 states and 9764 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:44,805 INFO L93 Difference]: Finished difference Result 5642 states and 18000 transitions. [2021-07-13 20:43:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:43:44,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:44,817 INFO L225 Difference]: With dead ends: 5642 [2021-07-13 20:43:44,817 INFO L226 Difference]: Without dead ends: 5642 [2021-07-13 20:43:44,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:43:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-07-13 20:43:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 2782. [2021-07-13 20:43:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 3.4998202085580727) internal successors, (9733), 2781 states have internal predecessors, (9733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 9733 transitions. [2021-07-13 20:43:44,878 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 9733 transitions. Word has length 28 [2021-07-13 20:43:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:44,878 INFO L482 AbstractCegarLoop]: Abstraction has 2782 states and 9733 transitions. [2021-07-13 20:43:44,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 9733 transitions. [2021-07-13 20:43:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:44,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:44,882 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:45,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-07-13 20:43:45,083 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 67 times [2021-07-13 20:43:45,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:45,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492266465] [2021-07-13 20:43:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:45,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:45,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492266465] [2021-07-13 20:43:45,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492266465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:45,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137809453] [2021-07-13 20:43:45,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:43:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:45,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137809453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:45,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:45,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:45,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138503133] [2021-07-13 20:43:45,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:45,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:45,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:45,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:45,214 INFO L87 Difference]: Start difference. First operand 2782 states and 9733 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:45,983 INFO L93 Difference]: Finished difference Result 6106 states and 19261 transitions. [2021-07-13 20:43:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:43:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:45,996 INFO L225 Difference]: With dead ends: 6106 [2021-07-13 20:43:45,996 INFO L226 Difference]: Without dead ends: 6106 [2021-07-13 20:43:45,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:43:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-07-13 20:43:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 2844. [2021-07-13 20:43:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 3.4956032360182907) internal successors, (9938), 2843 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 9938 transitions. [2021-07-13 20:43:46,070 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 9938 transitions. Word has length 28 [2021-07-13 20:43:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:46,070 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 9938 transitions. [2021-07-13 20:43:46,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 9938 transitions. [2021-07-13 20:43:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:46,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:46,074 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:46,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-13 20:43:46,293 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 68 times [2021-07-13 20:43:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:46,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423364959] [2021-07-13 20:43:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:46,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423364959] [2021-07-13 20:43:46,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423364959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266666095] [2021-07-13 20:43:46,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:43:46,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266666095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:46,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:43:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123766570] [2021-07-13 20:43:46,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:46,428 INFO L87 Difference]: Start difference. First operand 2844 states and 9938 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:46,939 INFO L93 Difference]: Finished difference Result 6899 states and 23235 transitions. [2021-07-13 20:43:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:43:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:46,969 INFO L225 Difference]: With dead ends: 6899 [2021-07-13 20:43:46,969 INFO L226 Difference]: Without dead ends: 6899 [2021-07-13 20:43:46,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:43:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-13 20:43:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4080. [2021-07-13 20:43:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 3.613875949987742) internal successors, (14741), 4079 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 14741 transitions. [2021-07-13 20:43:47,047 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 14741 transitions. Word has length 28 [2021-07-13 20:43:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:47,047 INFO L482 AbstractCegarLoop]: Abstraction has 4080 states and 14741 transitions. [2021-07-13 20:43:47,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 14741 transitions. [2021-07-13 20:43:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:47,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:47,053 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:47,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-07-13 20:43:47,253 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 69 times [2021-07-13 20:43:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:47,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087188067] [2021-07-13 20:43:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:47,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087188067] [2021-07-13 20:43:47,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087188067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26340575] [2021-07-13 20:43:47,290 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 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 [2021-07-13 20:43:47,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:43:47,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:47,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26340575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:47,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:47,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:47,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667093382] [2021-07-13 20:43:47,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:47,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:47,376 INFO L87 Difference]: Start difference. First operand 4080 states and 14741 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:48,073 INFO L93 Difference]: Finished difference Result 7418 states and 25100 transitions. [2021-07-13 20:43:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:43:48,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:48,089 INFO L225 Difference]: With dead ends: 7418 [2021-07-13 20:43:48,089 INFO L226 Difference]: Without dead ends: 7414 [2021-07-13 20:43:48,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:43:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-07-13 20:43:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 3968. [2021-07-13 20:43:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.623140912528359) internal successors, (14373), 3967 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14373 transitions. [2021-07-13 20:43:48,199 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14373 transitions. Word has length 28 [2021-07-13 20:43:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:48,199 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 14373 transitions. [2021-07-13 20:43:48,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14373 transitions. [2021-07-13 20:43:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:48,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:48,205 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:48,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-07-13 20:43:48,405 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:48,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-13 20:43:48,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:48,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926633653] [2021-07-13 20:43:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:48,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:48,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926633653] [2021-07-13 20:43:48,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926633653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594838779] [2021-07-13 20:43:48,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:43:48,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:48,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:48,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:48,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594838779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:48,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:43:48,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569611755] [2021-07-13 20:43:48,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:48,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:48,533 INFO L87 Difference]: Start difference. First operand 3968 states and 14373 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:43:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:49,272 INFO L93 Difference]: Finished difference Result 8219 states and 27545 transitions. [2021-07-13 20:43:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:43:49,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:43:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:49,289 INFO L225 Difference]: With dead ends: 8219 [2021-07-13 20:43:49,289 INFO L226 Difference]: Without dead ends: 8207 [2021-07-13 20:43:49,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:43:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2021-07-13 20:43:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 4409. [2021-07-13 20:43:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 3.713475499092559) internal successors, (16369), 4408 states have internal predecessors, (16369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 16369 transitions. [2021-07-13 20:43:49,394 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 16369 transitions. Word has length 28 [2021-07-13 20:43:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:49,394 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 16369 transitions. [2021-07-13 20:43:49,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:43:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 16369 transitions. [2021-07-13 20:43:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:49,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:49,401 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:49,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:49,602 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-13 20:43:49,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:49,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102589807] [2021-07-13 20:43:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:49,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:49,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102589807] [2021-07-13 20:43:49,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102589807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:49,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450158558] [2021-07-13 20:43:49,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:43:49,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:49,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:49,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450158558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:49,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:49,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:43:49,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037681910] [2021-07-13 20:43:49,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:49,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:49,751 INFO L87 Difference]: Start difference. First operand 4409 states and 16369 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:43:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:50,493 INFO L93 Difference]: Finished difference Result 8511 states and 28462 transitions. [2021-07-13 20:43:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:43:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:43:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:50,510 INFO L225 Difference]: With dead ends: 8511 [2021-07-13 20:43:50,510 INFO L226 Difference]: Without dead ends: 8511 [2021-07-13 20:43:50,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:43:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-07-13 20:43:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4429. [2021-07-13 20:43:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 3.7007678410117433) internal successors, (16387), 4428 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 16387 transitions. [2021-07-13 20:43:50,617 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 16387 transitions. Word has length 28 [2021-07-13 20:43:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:50,617 INFO L482 AbstractCegarLoop]: Abstraction has 4429 states and 16387 transitions. [2021-07-13 20:43:50,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:43:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 16387 transitions. [2021-07-13 20:43:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:50,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:50,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:50,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:50,825 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-13 20:43:50,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:50,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947832577] [2021-07-13 20:43:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:50,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947832577] [2021-07-13 20:43:50,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947832577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649454261] [2021-07-13 20:43:50,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:43:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649454261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:50,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:50,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773712866] [2021-07-13 20:43:50,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:50,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:50,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:50,967 INFO L87 Difference]: Start difference. First operand 4429 states and 16387 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:51,344 INFO L93 Difference]: Finished difference Result 7882 states and 27809 transitions. [2021-07-13 20:43:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:43:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:43:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:51,362 INFO L225 Difference]: With dead ends: 7882 [2021-07-13 20:43:51,362 INFO L226 Difference]: Without dead ends: 7799 [2021-07-13 20:43:51,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-07-13 20:43:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 5872. [2021-07-13 20:43:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 3.7629024016351558) internal successors, (22092), 5871 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 22092 transitions. [2021-07-13 20:43:51,476 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 22092 transitions. Word has length 28 [2021-07-13 20:43:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:51,476 INFO L482 AbstractCegarLoop]: Abstraction has 5872 states and 22092 transitions. [2021-07-13 20:43:51,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 22092 transitions. [2021-07-13 20:43:51,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:51,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:51,485 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:51,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-07-13 20:43:51,686 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-13 20:43:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585902583] [2021-07-13 20:43:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:51,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585902583] [2021-07-13 20:43:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585902583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494857784] [2021-07-13 20:43:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:43:51,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:51,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:51,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494857784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:51,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:51,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:43:51,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960495016] [2021-07-13 20:43:51,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:43:51,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:43:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:43:51,792 INFO L87 Difference]: Start difference. First operand 5872 states and 22092 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-07-13 20:43:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:51,953 INFO L93 Difference]: Finished difference Result 8160 states and 28714 transitions. [2021-07-13 20:43:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:43:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-07-13 20:43:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:51,971 INFO L225 Difference]: With dead ends: 8160 [2021-07-13 20:43:51,971 INFO L226 Difference]: Without dead ends: 8160 [2021-07-13 20:43:51,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-07-13 20:43:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 6012. [2021-07-13 20:43:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 3.7394776243553487) internal successors, (22478), 6011 states have internal predecessors, (22478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 22478 transitions. [2021-07-13 20:43:52,113 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 22478 transitions. Word has length 28 [2021-07-13 20:43:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:52,113 INFO L482 AbstractCegarLoop]: Abstraction has 6012 states and 22478 transitions. [2021-07-13 20:43:52,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-07-13 20:43:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 22478 transitions. [2021-07-13 20:43:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:52,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:52,123 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:52,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:52,323 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-13 20:43:52,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:52,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052208160] [2021-07-13 20:43:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:52,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:52,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052208160] [2021-07-13 20:43:52,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052208160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:52,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685496020] [2021-07-13 20:43:52,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:43:52,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:43:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:52,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685496020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:52,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:52,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:43:52,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242423184] [2021-07-13 20:43:52,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:52,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:52,444 INFO L87 Difference]: Start difference. First operand 6012 states and 22478 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:53,142 INFO L93 Difference]: Finished difference Result 12545 states and 43647 transitions. [2021-07-13 20:43:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:43:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:43:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:53,172 INFO L225 Difference]: With dead ends: 12545 [2021-07-13 20:43:53,172 INFO L226 Difference]: Without dead ends: 12545 [2021-07-13 20:43:53,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:43:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2021-07-13 20:43:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 6665. [2021-07-13 20:43:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.7554021608643455) internal successors, (25026), 6664 states have internal predecessors, (25026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 25026 transitions. [2021-07-13 20:43:53,384 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 25026 transitions. Word has length 28 [2021-07-13 20:43:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:53,384 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 25026 transitions. [2021-07-13 20:43:53,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 25026 transitions. [2021-07-13 20:43:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:53,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:53,396 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:53,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-07-13 20:43:53,596 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-13 20:43:53,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:53,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037404882] [2021-07-13 20:43:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:53,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:53,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037404882] [2021-07-13 20:43:53,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037404882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980514344] [2021-07-13 20:43:53,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:53,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:53,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980514344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:53,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:43:53,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013908331] [2021-07-13 20:43:53,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:53,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:53,719 INFO L87 Difference]: Start difference. First operand 6665 states and 25026 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:43:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:54,331 INFO L93 Difference]: Finished difference Result 12678 states and 44148 transitions. [2021-07-13 20:43:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:43:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-07-13 20:43:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:54,361 INFO L225 Difference]: With dead ends: 12678 [2021-07-13 20:43:54,361 INFO L226 Difference]: Without dead ends: 12678 [2021-07-13 20:43:54,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:43:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-07-13 20:43:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 6895. [2021-07-13 20:43:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 6894 states have (on average 3.7358572671888597) internal successors, (25755), 6894 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 25755 transitions. [2021-07-13 20:43:54,587 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 25755 transitions. Word has length 28 [2021-07-13 20:43:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:54,587 INFO L482 AbstractCegarLoop]: Abstraction has 6895 states and 25755 transitions. [2021-07-13 20:43:54,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:43:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 25755 transitions. [2021-07-13 20:43:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:54,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:54,598 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:54,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-07-13 20:43:54,798 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-13 20:43:54,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:54,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070834004] [2021-07-13 20:43:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:54,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:54,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070834004] [2021-07-13 20:43:54,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070834004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:54,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934586047] [2021-07-13 20:43:54,840 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 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 [2021-07-13 20:43:54,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:54,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:54,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934586047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:54,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:54,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:43:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579160790] [2021-07-13 20:43:54,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:54,917 INFO L87 Difference]: Start difference. First operand 6895 states and 25755 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:43:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:55,244 INFO L93 Difference]: Finished difference Result 9371 states and 33680 transitions. [2021-07-13 20:43:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:43:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:43:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:55,265 INFO L225 Difference]: With dead ends: 9371 [2021-07-13 20:43:55,265 INFO L226 Difference]: Without dead ends: 9341 [2021-07-13 20:43:55,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:43:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-07-13 20:43:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7751. [2021-07-13 20:43:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.7625806451612904) internal successors, (29160), 7750 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 29160 transitions. [2021-07-13 20:43:55,422 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 29160 transitions. Word has length 28 [2021-07-13 20:43:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:55,423 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 29160 transitions. [2021-07-13 20:43:55,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:43:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 29160 transitions. [2021-07-13 20:43:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:55,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:55,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:55,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-07-13 20:43:55,636 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-13 20:43:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:55,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367256498] [2021-07-13 20:43:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:55,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367256498] [2021-07-13 20:43:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367256498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909332844] [2021-07-13 20:43:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:43:55,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:55,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:55,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909332844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:55,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:43:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707756280] [2021-07-13 20:43:55,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:55,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:55,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:55,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:55,740 INFO L87 Difference]: Start difference. First operand 7751 states and 29160 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:43:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:56,109 INFO L93 Difference]: Finished difference Result 9993 states and 35743 transitions. [2021-07-13 20:43:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:43:56,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:43:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:56,129 INFO L225 Difference]: With dead ends: 9993 [2021-07-13 20:43:56,130 INFO L226 Difference]: Without dead ends: 9993 [2021-07-13 20:43:56,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:43:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-07-13 20:43:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 7791. [2021-07-13 20:43:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.7585365853658534) internal successors, (29279), 7790 states have internal predecessors, (29279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 29279 transitions. [2021-07-13 20:43:56,290 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 29279 transitions. Word has length 28 [2021-07-13 20:43:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:56,290 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 29279 transitions. [2021-07-13 20:43:56,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:43:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 29279 transitions. [2021-07-13 20:43:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:56,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:56,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:56,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-07-13 20:43:56,503 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-13 20:43:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:56,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080937486] [2021-07-13 20:43:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080937486] [2021-07-13 20:43:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080937486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289037326] [2021-07-13 20:43:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:56,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289037326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:56,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:56,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:43:56,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685357908] [2021-07-13 20:43:56,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:56,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:56,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:56,607 INFO L87 Difference]: Start difference. First operand 7791 states and 29279 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:43:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:57,156 INFO L93 Difference]: Finished difference Result 13376 states and 47489 transitions. [2021-07-13 20:43:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-07-13 20:43:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:57,187 INFO L225 Difference]: With dead ends: 13376 [2021-07-13 20:43:57,187 INFO L226 Difference]: Without dead ends: 13372 [2021-07-13 20:43:57,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:43:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-07-13 20:43:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 7707. [2021-07-13 20:43:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.7608357124318714) internal successors, (28981), 7706 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 28981 transitions. [2021-07-13 20:43:57,416 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 28981 transitions. Word has length 28 [2021-07-13 20:43:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:57,416 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 28981 transitions. [2021-07-13 20:43:57,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:43:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 28981 transitions. [2021-07-13 20:43:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:57,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:57,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-07-13 20:43:57,637 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-13 20:43:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:57,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572795946] [2021-07-13 20:43:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:57,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:57,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572795946] [2021-07-13 20:43:57,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572795946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:57,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654912593] [2021-07-13 20:43:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:57,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:57,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654912593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:57,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:57,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:57,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084530150] [2021-07-13 20:43:57,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:57,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:57,745 INFO L87 Difference]: Start difference. First operand 7707 states and 28981 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:58,142 INFO L93 Difference]: Finished difference Result 10234 states and 36622 transitions. [2021-07-13 20:43:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:43:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:43:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:58,164 INFO L225 Difference]: With dead ends: 10234 [2021-07-13 20:43:58,164 INFO L226 Difference]: Without dead ends: 10234 [2021-07-13 20:43:58,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-07-13 20:43:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 7653. [2021-07-13 20:43:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.753659174072138) internal successors, (28723), 7652 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28723 transitions. [2021-07-13 20:43:58,327 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28723 transitions. Word has length 28 [2021-07-13 20:43:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:58,327 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28723 transitions. [2021-07-13 20:43:58,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28723 transitions. [2021-07-13 20:43:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:58,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:58,340 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:58,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-07-13 20:43:58,541 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-13 20:43:58,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:58,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296183913] [2021-07-13 20:43:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:58,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296183913] [2021-07-13 20:43:58,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296183913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149581838] [2021-07-13 20:43:58,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:43:58,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:43:58,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:58,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149581838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:58,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:43:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220333747] [2021-07-13 20:43:58,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:58,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:58,714 INFO L87 Difference]: Start difference. First operand 7653 states and 28723 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:59,351 INFO L93 Difference]: Finished difference Result 13259 states and 46986 transitions. [2021-07-13 20:43:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:43:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:43:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:59,382 INFO L225 Difference]: With dead ends: 13259 [2021-07-13 20:43:59,382 INFO L226 Difference]: Without dead ends: 13247 [2021-07-13 20:43:59,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:43:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13247 states. [2021-07-13 20:43:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13247 to 7653. [2021-07-13 20:43:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.7526136957658127) internal successors, (28715), 7652 states have internal predecessors, (28715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28715 transitions. [2021-07-13 20:43:59,582 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28715 transitions. Word has length 28 [2021-07-13 20:43:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:59,582 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28715 transitions. [2021-07-13 20:43:59,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28715 transitions. [2021-07-13 20:43:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:59,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:59,595 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:59,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-07-13 20:43:59,795 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-13 20:43:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:59,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267242882] [2021-07-13 20:43:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:59,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:59,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267242882] [2021-07-13 20:43:59,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267242882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:59,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757515591] [2021-07-13 20:43:59,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:43:59,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:59,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:59,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:59,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:59,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757515591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826828374] [2021-07-13 20:43:59,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:59,920 INFO L87 Difference]: Start difference. First operand 7653 states and 28715 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:44:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:01,023 INFO L93 Difference]: Finished difference Result 20233 states and 70540 transitions. [2021-07-13 20:44:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:44:01,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:44:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:01,076 INFO L225 Difference]: With dead ends: 20233 [2021-07-13 20:44:01,077 INFO L226 Difference]: Without dead ends: 20233 [2021-07-13 20:44:01,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:44:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-07-13 20:44:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 10480. [2021-07-13 20:44:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10480 states, 10479 states have (on average 3.7973089035213285) internal successors, (39792), 10479 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 39792 transitions. [2021-07-13 20:44:01,427 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 39792 transitions. Word has length 28 [2021-07-13 20:44:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:01,428 INFO L482 AbstractCegarLoop]: Abstraction has 10480 states and 39792 transitions. [2021-07-13 20:44:01,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:44:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 39792 transitions. [2021-07-13 20:44:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:01,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:01,445 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:01,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:01,646 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-13 20:44:01,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:01,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972988120] [2021-07-13 20:44:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:01,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:01,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972988120] [2021-07-13 20:44:01,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972988120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:01,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473676701] [2021-07-13 20:44:01,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:44:01,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:44:01,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:01,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473676701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:01,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:01,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:44:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855590248] [2021-07-13 20:44:01,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:01,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:01,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:01,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:01,812 INFO L87 Difference]: Start difference. First operand 10480 states and 39792 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:44:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:02,772 INFO L93 Difference]: Finished difference Result 19460 states and 68525 transitions. [2021-07-13 20:44:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:02,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:44:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:02,821 INFO L225 Difference]: With dead ends: 19460 [2021-07-13 20:44:02,821 INFO L226 Difference]: Without dead ends: 19448 [2021-07-13 20:44:02,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:44:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2021-07-13 20:44:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 10294. [2021-07-13 20:44:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 10293 states have (on average 3.8036529680365296) internal successors, (39151), 10293 states have internal predecessors, (39151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 39151 transitions. [2021-07-13 20:44:03,207 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 39151 transitions. Word has length 28 [2021-07-13 20:44:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:03,207 INFO L482 AbstractCegarLoop]: Abstraction has 10294 states and 39151 transitions. [2021-07-13 20:44:03,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:44:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 39151 transitions. [2021-07-13 20:44:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:03,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:03,223 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:03,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:03,424 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-13 20:44:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:03,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022042247] [2021-07-13 20:44:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:03,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:03,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022042247] [2021-07-13 20:44:03,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022042247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429676649] [2021-07-13 20:44:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:44:03,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:03,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:03,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:03,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429676649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:03,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:44:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21618653] [2021-07-13 20:44:03,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:03,557 INFO L87 Difference]: Start difference. First operand 10294 states and 39151 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:44:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:04,458 INFO L93 Difference]: Finished difference Result 19263 states and 67830 transitions. [2021-07-13 20:44:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:44:04,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:44:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:04,506 INFO L225 Difference]: With dead ends: 19263 [2021-07-13 20:44:04,507 INFO L226 Difference]: Without dead ends: 19227 [2021-07-13 20:44:04,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 519.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:44:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19227 states. [2021-07-13 20:44:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19227 to 10338. [2021-07-13 20:44:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10338 states, 10337 states have (on average 3.8017800135435813) internal successors, (39299), 10337 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10338 states to 10338 states and 39299 transitions. [2021-07-13 20:44:04,869 INFO L78 Accepts]: Start accepts. Automaton has 10338 states and 39299 transitions. Word has length 28 [2021-07-13 20:44:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:04,869 INFO L482 AbstractCegarLoop]: Abstraction has 10338 states and 39299 transitions. [2021-07-13 20:44:04,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:44:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10338 states and 39299 transitions. [2021-07-13 20:44:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:04,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:04,886 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:05,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:05,086 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:05,087 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-13 20:44:05,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:05,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528783080] [2021-07-13 20:44:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:05,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528783080] [2021-07-13 20:44:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528783080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730983802] [2021-07-13 20:44:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:44:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:05,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730983802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:05,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:05,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:44:05,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208345523] [2021-07-13 20:44:05,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:05,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:05,230 INFO L87 Difference]: Start difference. First operand 10338 states and 39299 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:06,636 INFO L93 Difference]: Finished difference Result 19164 states and 67607 transitions. [2021-07-13 20:44:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:44:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:06,687 INFO L225 Difference]: With dead ends: 19164 [2021-07-13 20:44:06,687 INFO L226 Difference]: Without dead ends: 19164 [2021-07-13 20:44:06,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 804.1ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:44:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19164 states. [2021-07-13 20:44:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19164 to 10534. [2021-07-13 20:44:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10534 states, 10533 states have (on average 3.79274660590525) internal successors, (39949), 10533 states have internal predecessors, (39949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10534 states to 10534 states and 39949 transitions. [2021-07-13 20:44:07,063 INFO L78 Accepts]: Start accepts. Automaton has 10534 states and 39949 transitions. Word has length 28 [2021-07-13 20:44:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:07,063 INFO L482 AbstractCegarLoop]: Abstraction has 10534 states and 39949 transitions. [2021-07-13 20:44:07,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 10534 states and 39949 transitions. [2021-07-13 20:44:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:07,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:07,086 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:07,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:07,286 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-13 20:44:07,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:07,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274570992] [2021-07-13 20:44:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:07,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:07,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274570992] [2021-07-13 20:44:07,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274570992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:07,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702221793] [2021-07-13 20:44:07,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:44:07,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:07,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:07,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:07,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702221793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:07,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:07,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:44:07,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590073194] [2021-07-13 20:44:07,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:07,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:07,425 INFO L87 Difference]: Start difference. First operand 10534 states and 39949 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:08,680 INFO L93 Difference]: Finished difference Result 18787 states and 66570 transitions. [2021-07-13 20:44:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:44:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:08,728 INFO L225 Difference]: With dead ends: 18787 [2021-07-13 20:44:08,728 INFO L226 Difference]: Without dead ends: 18775 [2021-07-13 20:44:08,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 721.0ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:44:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-13 20:44:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10416. [2021-07-13 20:44:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10416 states, 10415 states have (on average 3.797215554488718) internal successors, (39548), 10415 states have internal predecessors, (39548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10416 states to 10416 states and 39548 transitions. [2021-07-13 20:44:09,065 INFO L78 Accepts]: Start accepts. Automaton has 10416 states and 39548 transitions. Word has length 28 [2021-07-13 20:44:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:09,065 INFO L482 AbstractCegarLoop]: Abstraction has 10416 states and 39548 transitions. [2021-07-13 20:44:09,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10416 states and 39548 transitions. [2021-07-13 20:44:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:09,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:09,083 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:09,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:09,284 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-13 20:44:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:09,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384125964] [2021-07-13 20:44:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:09,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384125964] [2021-07-13 20:44:09,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384125964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443976443] [2021-07-13 20:44:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:44:09,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:44:09,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443976443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:09,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:44:09,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873159533] [2021-07-13 20:44:09,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:09,414 INFO L87 Difference]: Start difference. First operand 10416 states and 39548 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:10,410 INFO L93 Difference]: Finished difference Result 18027 states and 64486 transitions. [2021-07-13 20:44:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:44:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:10,457 INFO L225 Difference]: With dead ends: 18027 [2021-07-13 20:44:10,457 INFO L226 Difference]: Without dead ends: 17991 [2021-07-13 20:44:10,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:44:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17991 states. [2021-07-13 20:44:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17991 to 10440. [2021-07-13 20:44:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.796149056423029) internal successors, (39628), 10439 states have internal predecessors, (39628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 39628 transitions. [2021-07-13 20:44:10,806 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 39628 transitions. Word has length 28 [2021-07-13 20:44:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:10,806 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 39628 transitions. [2021-07-13 20:44:10,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 39628 transitions. [2021-07-13 20:44:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:10,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:10,824 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:11,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4107 [2021-07-13 20:44:11,025 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-13 20:44:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:11,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37127625] [2021-07-13 20:44:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:11,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:11,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37127625] [2021-07-13 20:44:11,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37127625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:11,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951864897] [2021-07-13 20:44:11,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:44:11,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:11,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951864897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:11,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:11,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458641145] [2021-07-13 20:44:11,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:11,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:11,188 INFO L87 Difference]: Start difference. First operand 10440 states and 39628 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:12,380 INFO L93 Difference]: Finished difference Result 26119 states and 92958 transitions. [2021-07-13 20:44:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:44:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:12,456 INFO L225 Difference]: With dead ends: 26119 [2021-07-13 20:44:12,456 INFO L226 Difference]: Without dead ends: 26119 [2021-07-13 20:44:12,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:44:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26119 states. [2021-07-13 20:44:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26119 to 10727. [2021-07-13 20:44:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10727 states, 10726 states have (on average 3.821928025358941) internal successors, (40994), 10726 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10727 states to 10727 states and 40994 transitions. [2021-07-13 20:44:12,900 INFO L78 Accepts]: Start accepts. Automaton has 10727 states and 40994 transitions. Word has length 28 [2021-07-13 20:44:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:12,900 INFO L482 AbstractCegarLoop]: Abstraction has 10727 states and 40994 transitions. [2021-07-13 20:44:12,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10727 states and 40994 transitions. [2021-07-13 20:44:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:12,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:12,919 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:13,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:13,119 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-13 20:44:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:13,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644832249] [2021-07-13 20:44:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:13,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:13,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644832249] [2021-07-13 20:44:13,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644832249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:13,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284640147] [2021-07-13 20:44:13,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:44:13,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:13,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:13,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284640147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:13,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:13,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:13,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243303482] [2021-07-13 20:44:13,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:13,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:13,267 INFO L87 Difference]: Start difference. First operand 10727 states and 40994 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:14,462 INFO L93 Difference]: Finished difference Result 25550 states and 91560 transitions. [2021-07-13 20:44:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:44:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:14,537 INFO L225 Difference]: With dead ends: 25550 [2021-07-13 20:44:14,537 INFO L226 Difference]: Without dead ends: 25550 [2021-07-13 20:44:14,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:44:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25550 states. [2021-07-13 20:44:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25550 to 10629. [2021-07-13 20:44:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.8091832894241624) internal successors, (40484), 10628 states have internal predecessors, (40484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 40484 transitions. [2021-07-13 20:44:15,025 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 40484 transitions. Word has length 28 [2021-07-13 20:44:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:15,026 INFO L482 AbstractCegarLoop]: Abstraction has 10629 states and 40484 transitions. [2021-07-13 20:44:15,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 40484 transitions. [2021-07-13 20:44:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:15,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:15,045 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:15,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4109 [2021-07-13 20:44:15,245 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-13 20:44:15,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:15,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515149265] [2021-07-13 20:44:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:15,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515149265] [2021-07-13 20:44:15,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515149265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124147916] [2021-07-13 20:44:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:44:15,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:15,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:15,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124147916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:15,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:15,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:15,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996762744] [2021-07-13 20:44:15,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:15,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:15,398 INFO L87 Difference]: Start difference. First operand 10629 states and 40484 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:16,182 INFO L93 Difference]: Finished difference Result 20289 states and 72951 transitions. [2021-07-13 20:44:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:44:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:16,233 INFO L225 Difference]: With dead ends: 20289 [2021-07-13 20:44:16,234 INFO L226 Difference]: Without dead ends: 20289 [2021-07-13 20:44:16,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:44:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20289 states. [2021-07-13 20:44:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20289 to 10638. [2021-07-13 20:44:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 3.8081225909560965) internal successors, (40507), 10637 states have internal predecessors, (40507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 40507 transitions. [2021-07-13 20:44:16,545 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 40507 transitions. Word has length 28 [2021-07-13 20:44:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:16,545 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 40507 transitions. [2021-07-13 20:44:16,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 40507 transitions. [2021-07-13 20:44:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:16,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:16,564 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:16,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4110,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:16,764 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-13 20:44:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:16,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951126150] [2021-07-13 20:44:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:16,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951126150] [2021-07-13 20:44:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951126150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229423669] [2021-07-13 20:44:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:44:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:16,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:16,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:16,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229423669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:16,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:16,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:16,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392622182] [2021-07-13 20:44:16,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:16,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:16,902 INFO L87 Difference]: Start difference. First operand 10638 states and 40507 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:17,663 INFO L93 Difference]: Finished difference Result 18838 states and 68311 transitions. [2021-07-13 20:44:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:44:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:17,712 INFO L225 Difference]: With dead ends: 18838 [2021-07-13 20:44:17,712 INFO L226 Difference]: Without dead ends: 18838 [2021-07-13 20:44:17,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:44:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2021-07-13 20:44:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 10650. [2021-07-13 20:44:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 3.807399755845619) internal successors, (40545), 10649 states have internal predecessors, (40545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 40545 transitions. [2021-07-13 20:44:18,021 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 40545 transitions. Word has length 28 [2021-07-13 20:44:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:18,021 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 40545 transitions. [2021-07-13 20:44:18,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 40545 transitions. [2021-07-13 20:44:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:18,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:18,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:18,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-07-13 20:44:18,240 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-13 20:44:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:18,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136213384] [2021-07-13 20:44:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:18,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136213384] [2021-07-13 20:44:18,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136213384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355824846] [2021-07-13 20:44:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 20:44:18,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:18,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355824846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:18,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:18,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:18,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551987374] [2021-07-13 20:44:18,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:18,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:18,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:18,386 INFO L87 Difference]: Start difference. First operand 10650 states and 40545 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:19,404 INFO L93 Difference]: Finished difference Result 19442 states and 70046 transitions. [2021-07-13 20:44:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:44:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:19,458 INFO L225 Difference]: With dead ends: 19442 [2021-07-13 20:44:19,458 INFO L226 Difference]: Without dead ends: 19442 [2021-07-13 20:44:19,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 648.2ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:44:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2021-07-13 20:44:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 10758. [2021-07-13 20:44:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10758 states, 10757 states have (on average 3.8002231105326763) internal successors, (40879), 10757 states have internal predecessors, (40879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 40879 transitions. [2021-07-13 20:44:19,817 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 40879 transitions. Word has length 28 [2021-07-13 20:44:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:19,817 INFO L482 AbstractCegarLoop]: Abstraction has 10758 states and 40879 transitions. [2021-07-13 20:44:19,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 40879 transitions. [2021-07-13 20:44:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:19,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:19,835 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:20,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-13 20:44:20,035 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-13 20:44:20,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:20,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030393908] [2021-07-13 20:44:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:20,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:20,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030393908] [2021-07-13 20:44:20,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030393908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137789905] [2021-07-13 20:44:20,067 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 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 [2021-07-13 20:44:20,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:44:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:20,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137789905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:20,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:20,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816795934] [2021-07-13 20:44:20,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:20,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:20,179 INFO L87 Difference]: Start difference. First operand 10758 states and 40879 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:21,057 INFO L93 Difference]: Finished difference Result 19017 states and 68890 transitions. [2021-07-13 20:44:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:44:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:21,111 INFO L225 Difference]: With dead ends: 19017 [2021-07-13 20:44:21,111 INFO L226 Difference]: Without dead ends: 19013 [2021-07-13 20:44:21,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:44:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-07-13 20:44:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 10684. [2021-07-13 20:44:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10683 states have (on average 3.804174857249836) internal successors, (40640), 10683 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 40640 transitions. [2021-07-13 20:44:21,424 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 40640 transitions. Word has length 28 [2021-07-13 20:44:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:21,424 INFO L482 AbstractCegarLoop]: Abstraction has 10684 states and 40640 transitions. [2021-07-13 20:44:21,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 40640 transitions. [2021-07-13 20:44:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:21,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:21,443 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:21,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:21,643 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-13 20:44:21,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:21,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6022893] [2021-07-13 20:44:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:21,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:21,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6022893] [2021-07-13 20:44:21,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6022893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:21,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149048344] [2021-07-13 20:44:21,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:44:21,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:21,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149048344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:21,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:21,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:44:21,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041602376] [2021-07-13 20:44:21,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:21,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:21,791 INFO L87 Difference]: Start difference. First operand 10684 states and 40640 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:22,802 INFO L93 Difference]: Finished difference Result 18448 states and 66382 transitions. [2021-07-13 20:44:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:44:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:22,848 INFO L225 Difference]: With dead ends: 18448 [2021-07-13 20:44:22,848 INFO L226 Difference]: Without dead ends: 18448 [2021-07-13 20:44:22,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:44:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2021-07-13 20:44:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 10911. [2021-07-13 20:44:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 3.807332722273144) internal successors, (41538), 10910 states have internal predecessors, (41538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 41538 transitions. [2021-07-13 20:44:23,170 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 41538 transitions. Word has length 28 [2021-07-13 20:44:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:23,170 INFO L482 AbstractCegarLoop]: Abstraction has 10911 states and 41538 transitions. [2021-07-13 20:44:23,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 41538 transitions. [2021-07-13 20:44:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:23,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:23,189 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:23,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:23,390 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-13 20:44:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072383783] [2021-07-13 20:44:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:23,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:23,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072383783] [2021-07-13 20:44:23,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072383783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765000913] [2021-07-13 20:44:23,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:44:23,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:44:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:23,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765000913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:23,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:44:23,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782717393] [2021-07-13 20:44:23,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:23,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:23,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:23,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:23,530 INFO L87 Difference]: Start difference. First operand 10911 states and 41538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:24,441 INFO L93 Difference]: Finished difference Result 18161 states and 65584 transitions. [2021-07-13 20:44:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:44:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:24,488 INFO L225 Difference]: With dead ends: 18161 [2021-07-13 20:44:24,488 INFO L226 Difference]: Without dead ends: 18149 [2021-07-13 20:44:24,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:44:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18149 states. [2021-07-13 20:44:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18149 to 11013. [2021-07-13 20:44:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 11012 states have (on average 3.801398474391573) internal successors, (41861), 11012 states have internal predecessors, (41861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 41861 transitions. [2021-07-13 20:44:24,839 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 41861 transitions. Word has length 28 [2021-07-13 20:44:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:24,839 INFO L482 AbstractCegarLoop]: Abstraction has 11013 states and 41861 transitions. [2021-07-13 20:44:24,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 41861 transitions. [2021-07-13 20:44:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:24,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:24,858 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:25,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:25,059 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 70 times [2021-07-13 20:44:25,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:25,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157867766] [2021-07-13 20:44:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:25,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:25,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157867766] [2021-07-13 20:44:25,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157867766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:25,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051987349] [2021-07-13 20:44:25,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:44:25,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:25,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:25,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051987349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:25,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:25,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:44:25,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864567808] [2021-07-13 20:44:25,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:25,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:25,178 INFO L87 Difference]: Start difference. First operand 11013 states and 41861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:44:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:25,635 INFO L93 Difference]: Finished difference Result 15676 states and 57990 transitions. [2021-07-13 20:44:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:44:25,635 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:44:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:25,674 INFO L225 Difference]: With dead ends: 15676 [2021-07-13 20:44:25,674 INFO L226 Difference]: Without dead ends: 15676 [2021-07-13 20:44:25,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:44:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15676 states. [2021-07-13 20:44:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15676 to 11085. [2021-07-13 20:44:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11085 states, 11084 states have (on average 3.7969144713099965) internal successors, (42085), 11084 states have internal predecessors, (42085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 42085 transitions. [2021-07-13 20:44:25,935 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 42085 transitions. Word has length 28 [2021-07-13 20:44:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:25,935 INFO L482 AbstractCegarLoop]: Abstraction has 11085 states and 42085 transitions. [2021-07-13 20:44:25,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:44:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 42085 transitions. [2021-07-13 20:44:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:25,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:25,954 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:26,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4116,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:26,154 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 71 times [2021-07-13 20:44:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:26,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488616814] [2021-07-13 20:44:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:26,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488616814] [2021-07-13 20:44:26,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488616814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786241088] [2021-07-13 20:44:26,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:44:26,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:44:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:26,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:26,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786241088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:26,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:26,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:26,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395142333] [2021-07-13 20:44:26,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:26,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:26,269 INFO L87 Difference]: Start difference. First operand 11085 states and 42085 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:26,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:26,778 INFO L93 Difference]: Finished difference Result 16651 states and 60827 transitions. [2021-07-13 20:44:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:44:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:44:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:26,885 INFO L225 Difference]: With dead ends: 16651 [2021-07-13 20:44:26,886 INFO L226 Difference]: Without dead ends: 16651 [2021-07-13 20:44:26,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:44:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16651 states. [2021-07-13 20:44:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16651 to 11413. [2021-07-13 20:44:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11413 states, 11412 states have (on average 3.7797932001402033) internal successors, (43135), 11412 states have internal predecessors, (43135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 43135 transitions. [2021-07-13 20:44:27,151 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 43135 transitions. Word has length 28 [2021-07-13 20:44:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:27,151 INFO L482 AbstractCegarLoop]: Abstraction has 11413 states and 43135 transitions. [2021-07-13 20:44:27,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 43135 transitions. [2021-07-13 20:44:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:27,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:27,170 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:27,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4117,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:27,371 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 72 times [2021-07-13 20:44:27,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:27,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639973224] [2021-07-13 20:44:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:27,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639973224] [2021-07-13 20:44:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639973224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983407258] [2021-07-13 20:44:27,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:44:27,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:44:27,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:27,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:27,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983407258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:27,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:27,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:27,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596273859] [2021-07-13 20:44:27,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:27,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:27,483 INFO L87 Difference]: Start difference. First operand 11413 states and 43135 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:27,908 INFO L93 Difference]: Finished difference Result 16138 states and 59485 transitions. [2021-07-13 20:44:27,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:44:27,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:44:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:27,951 INFO L225 Difference]: With dead ends: 16138 [2021-07-13 20:44:27,951 INFO L226 Difference]: Without dead ends: 16130 [2021-07-13 20:44:27,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:44:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2021-07-13 20:44:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 11353. [2021-07-13 20:44:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 3.781800563777308) internal successors, (42931), 11352 states have internal predecessors, (42931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 42931 transitions. [2021-07-13 20:44:28,239 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 42931 transitions. Word has length 28 [2021-07-13 20:44:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:28,239 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 42931 transitions. [2021-07-13 20:44:28,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 42931 transitions. [2021-07-13 20:44:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:28,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:28,259 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:28,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,459 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 73 times [2021-07-13 20:44:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:28,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132351005] [2021-07-13 20:44:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:28,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132351005] [2021-07-13 20:44:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132351005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059609798] [2021-07-13 20:44:28,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:44:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059609798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:28,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:44:28,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119072511] [2021-07-13 20:44:28,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:28,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:28,575 INFO L87 Difference]: Start difference. First operand 11353 states and 42931 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:44:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:29,012 INFO L93 Difference]: Finished difference Result 16038 states and 59197 transitions. [2021-07-13 20:44:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:44:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:44:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:29,117 INFO L225 Difference]: With dead ends: 16038 [2021-07-13 20:44:29,117 INFO L226 Difference]: Without dead ends: 16026 [2021-07-13 20:44:29,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:44:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16026 states. [2021-07-13 20:44:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16026 to 11325. [2021-07-13 20:44:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11324 states have (on average 3.7826739667961853) internal successors, (42835), 11324 states have internal predecessors, (42835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 42835 transitions. [2021-07-13 20:44:29,357 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 42835 transitions. Word has length 28 [2021-07-13 20:44:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:29,357 INFO L482 AbstractCegarLoop]: Abstraction has 11325 states and 42835 transitions. [2021-07-13 20:44:29,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:44:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 42835 transitions. [2021-07-13 20:44:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:29,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:29,377 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:29,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:29,577 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 74 times [2021-07-13 20:44:29,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:29,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095232562] [2021-07-13 20:44:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:29,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095232562] [2021-07-13 20:44:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095232562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865426808] [2021-07-13 20:44:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:44:29,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:29,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:29,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:29,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865426808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:29,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:29,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:29,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784107020] [2021-07-13 20:44:29,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:29,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:29,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:29,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:29,719 INFO L87 Difference]: Start difference. First operand 11325 states and 42835 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:30,644 INFO L93 Difference]: Finished difference Result 21822 states and 77756 transitions. [2021-07-13 20:44:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:44:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:30,701 INFO L225 Difference]: With dead ends: 21822 [2021-07-13 20:44:30,702 INFO L226 Difference]: Without dead ends: 21822 [2021-07-13 20:44:30,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 479.6ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:44:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21822 states. [2021-07-13 20:44:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21822 to 11307. [2021-07-13 20:44:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.7813550327259864) internal successors, (42752), 11306 states have internal predecessors, (42752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 42752 transitions. [2021-07-13 20:44:31,036 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 42752 transitions. Word has length 28 [2021-07-13 20:44:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:31,036 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 42752 transitions. [2021-07-13 20:44:31,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 42752 transitions. [2021-07-13 20:44:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:31,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:31,056 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:31,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4120,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:31,257 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-13 20:44:31,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:31,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883497148] [2021-07-13 20:44:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:31,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883497148] [2021-07-13 20:44:31,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883497148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604115945] [2021-07-13 20:44:31,282 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 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 [2021-07-13 20:44:31,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:44:31,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:31,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:31,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604115945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:31,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:31,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:44:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723803768] [2021-07-13 20:44:31,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:31,386 INFO L87 Difference]: Start difference. First operand 11307 states and 42752 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:32,073 INFO L93 Difference]: Finished difference Result 17653 states and 63688 transitions. [2021-07-13 20:44:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:44:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:32,120 INFO L225 Difference]: With dead ends: 17653 [2021-07-13 20:44:32,120 INFO L226 Difference]: Without dead ends: 17640 [2021-07-13 20:44:32,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:44:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2021-07-13 20:44:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 12618. [2021-07-13 20:44:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.8484584291035904) internal successors, (48556), 12617 states have internal predecessors, (48556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 48556 transitions. [2021-07-13 20:44:32,468 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 48556 transitions. Word has length 28 [2021-07-13 20:44:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:32,468 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 48556 transitions. [2021-07-13 20:44:32,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 48556 transitions. [2021-07-13 20:44:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:32,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:32,491 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:32,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-07-13 20:44:32,692 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-13 20:44:32,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:32,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235625516] [2021-07-13 20:44:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:32,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235625516] [2021-07-13 20:44:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235625516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847840801] [2021-07-13 20:44:32,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:44:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:32,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847840801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:32,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:44:32,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290704408] [2021-07-13 20:44:32,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:32,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:32,823 INFO L87 Difference]: Start difference. First operand 12618 states and 48556 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:33,542 INFO L93 Difference]: Finished difference Result 17754 states and 63945 transitions. [2021-07-13 20:44:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:44:33,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:33,585 INFO L225 Difference]: With dead ends: 17754 [2021-07-13 20:44:33,586 INFO L226 Difference]: Without dead ends: 17748 [2021-07-13 20:44:33,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:44:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2021-07-13 20:44:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 12591. [2021-07-13 20:44:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12591 states, 12590 states have (on average 3.8476568705321683) internal successors, (48442), 12590 states have internal predecessors, (48442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12591 states to 12591 states and 48442 transitions. [2021-07-13 20:44:33,978 INFO L78 Accepts]: Start accepts. Automaton has 12591 states and 48442 transitions. Word has length 28 [2021-07-13 20:44:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:33,978 INFO L482 AbstractCegarLoop]: Abstraction has 12591 states and 48442 transitions. [2021-07-13 20:44:33,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 12591 states and 48442 transitions. [2021-07-13 20:44:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:34,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:34,001 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:34,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-07-13 20:44:34,202 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-13 20:44:34,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:34,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888303821] [2021-07-13 20:44:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:34,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:34,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888303821] [2021-07-13 20:44:34,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888303821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:34,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401257451] [2021-07-13 20:44:34,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:44:34,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:34,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:34,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:34,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401257451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:34,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:44:34,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515818825] [2021-07-13 20:44:34,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:34,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:34,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:34,319 INFO L87 Difference]: Start difference. First operand 12591 states and 48442 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:44:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:34,905 INFO L93 Difference]: Finished difference Result 19810 states and 71449 transitions. [2021-07-13 20:44:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:44:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:44:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:34,952 INFO L225 Difference]: With dead ends: 19810 [2021-07-13 20:44:34,953 INFO L226 Difference]: Without dead ends: 19797 [2021-07-13 20:44:34,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19797 states. [2021-07-13 20:44:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19797 to 12651. [2021-07-13 20:44:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.8523320158102767) internal successors, (48732), 12650 states have internal predecessors, (48732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 48732 transitions. [2021-07-13 20:44:35,296 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 48732 transitions. Word has length 28 [2021-07-13 20:44:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:35,296 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 48732 transitions. [2021-07-13 20:44:35,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:44:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 48732 transitions. [2021-07-13 20:44:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:35,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:35,320 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:35,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-07-13 20:44:35,520 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:35,520 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-13 20:44:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:35,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715059458] [2021-07-13 20:44:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:35,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715059458] [2021-07-13 20:44:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715059458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018943566] [2021-07-13 20:44:35,545 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 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 [2021-07-13 20:44:35,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:44:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:35,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018943566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:35,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:35,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:44:35,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672461235] [2021-07-13 20:44:35,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:35,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:35,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:35,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:35,642 INFO L87 Difference]: Start difference. First operand 12651 states and 48732 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:44:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:36,369 INFO L93 Difference]: Finished difference Result 20959 states and 75039 transitions. [2021-07-13 20:44:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:44:36,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:44:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:36,427 INFO L225 Difference]: With dead ends: 20959 [2021-07-13 20:44:36,428 INFO L226 Difference]: Without dead ends: 20959 [2021-07-13 20:44:36,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:44:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20959 states. [2021-07-13 20:44:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20959 to 12667. [2021-07-13 20:44:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12667 states, 12666 states have (on average 3.849281541133744) internal successors, (48755), 12666 states have internal predecessors, (48755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 48755 transitions. [2021-07-13 20:44:36,860 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 48755 transitions. Word has length 28 [2021-07-13 20:44:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:36,860 INFO L482 AbstractCegarLoop]: Abstraction has 12667 states and 48755 transitions. [2021-07-13 20:44:36,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:44:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 48755 transitions. [2021-07-13 20:44:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:36,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:36,883 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:37,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:37,097 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:37,097 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 75 times [2021-07-13 20:44:37,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:37,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868034528] [2021-07-13 20:44:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:37,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868034528] [2021-07-13 20:44:37,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868034528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374834135] [2021-07-13 20:44:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:44:37,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:44:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:37,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374834135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:37,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:37,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:37,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881760527] [2021-07-13 20:44:37,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:37,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:37,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:37,227 INFO L87 Difference]: Start difference. First operand 12667 states and 48755 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:44:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:38,100 INFO L93 Difference]: Finished difference Result 22039 states and 80934 transitions. [2021-07-13 20:44:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:44:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:44:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:38,160 INFO L225 Difference]: With dead ends: 22039 [2021-07-13 20:44:38,160 INFO L226 Difference]: Without dead ends: 22035 [2021-07-13 20:44:38,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:44:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22035 states. [2021-07-13 20:44:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22035 to 12921. [2021-07-13 20:44:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12920 states have (on average 3.8388544891640866) internal successors, (49598), 12920 states have internal predecessors, (49598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 49598 transitions. [2021-07-13 20:44:38,571 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 49598 transitions. Word has length 28 [2021-07-13 20:44:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:38,572 INFO L482 AbstractCegarLoop]: Abstraction has 12921 states and 49598 transitions. [2021-07-13 20:44:38,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:44:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 49598 transitions. [2021-07-13 20:44:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:38,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:38,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:38,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:38,796 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-13 20:44:38,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:38,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953425653] [2021-07-13 20:44:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:38,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:38,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953425653] [2021-07-13 20:44:38,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953425653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:38,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296564272] [2021-07-13 20:44:38,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:44:38,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:38,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296564272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:38,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:38,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:44:38,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606671597] [2021-07-13 20:44:38,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:38,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:38,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:38,995 INFO L87 Difference]: Start difference. First operand 12921 states and 49598 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:44:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:39,599 INFO L93 Difference]: Finished difference Result 18745 states and 68634 transitions. [2021-07-13 20:44:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:44:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:44:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:39,643 INFO L225 Difference]: With dead ends: 18745 [2021-07-13 20:44:39,643 INFO L226 Difference]: Without dead ends: 18722 [2021-07-13 20:44:39,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:44:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18722 states. [2021-07-13 20:44:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18722 to 13216. [2021-07-13 20:44:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 13215 states have (on average 3.855996973136587) internal successors, (50957), 13215 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 50957 transitions. [2021-07-13 20:44:40,002 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 50957 transitions. Word has length 28 [2021-07-13 20:44:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:40,002 INFO L482 AbstractCegarLoop]: Abstraction has 13216 states and 50957 transitions. [2021-07-13 20:44:40,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:44:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 50957 transitions. [2021-07-13 20:44:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:40,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:40,026 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:40,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:40,227 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-13 20:44:40,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:40,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487707780] [2021-07-13 20:44:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:40,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:40,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487707780] [2021-07-13 20:44:40,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487707780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:40,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118580780] [2021-07-13 20:44:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 20:44:40,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:44:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:40,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118580780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:40,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:40,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:44:40,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994294870] [2021-07-13 20:44:40,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:40,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:40,348 INFO L87 Difference]: Start difference. First operand 13216 states and 50957 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:44:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:41,024 INFO L93 Difference]: Finished difference Result 18738 states and 67728 transitions. [2021-07-13 20:44:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:44:41,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:44:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:41,072 INFO L225 Difference]: With dead ends: 18738 [2021-07-13 20:44:41,072 INFO L226 Difference]: Without dead ends: 18738 [2021-07-13 20:44:41,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:44:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18738 states. [2021-07-13 20:44:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18738 to 13171. [2021-07-13 20:44:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 13170 states have (on average 3.847835990888383) internal successors, (50676), 13170 states have internal predecessors, (50676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 50676 transitions. [2021-07-13 20:44:41,492 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 50676 transitions. Word has length 28 [2021-07-13 20:44:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:41,492 INFO L482 AbstractCegarLoop]: Abstraction has 13171 states and 50676 transitions. [2021-07-13 20:44:41,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:44:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 50676 transitions. [2021-07-13 20:44:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:41,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:41,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:41,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:41,721 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-13 20:44:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:41,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265657129] [2021-07-13 20:44:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:41,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265657129] [2021-07-13 20:44:41,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265657129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004453047] [2021-07-13 20:44:41,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:44:41,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:41,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004453047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:41,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:44:41,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526433454] [2021-07-13 20:44:41,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:41,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:41,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:41,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:41,842 INFO L87 Difference]: Start difference. First operand 13171 states and 50676 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:44:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:42,463 INFO L93 Difference]: Finished difference Result 20089 states and 73010 transitions. [2021-07-13 20:44:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:44:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:44:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:42,515 INFO L225 Difference]: With dead ends: 20089 [2021-07-13 20:44:42,516 INFO L226 Difference]: Without dead ends: 20089 [2021-07-13 20:44:42,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:44:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20089 states. [2021-07-13 20:44:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20089 to 13878. [2021-07-13 20:44:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13877 states have (on average 3.834186063270159) internal successors, (53207), 13877 states have internal predecessors, (53207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 53207 transitions. [2021-07-13 20:44:42,867 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 53207 transitions. Word has length 28 [2021-07-13 20:44:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:42,867 INFO L482 AbstractCegarLoop]: Abstraction has 13878 states and 53207 transitions. [2021-07-13 20:44:42,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:44:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 53207 transitions. [2021-07-13 20:44:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:42,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:42,891 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:43,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4128 [2021-07-13 20:44:43,097 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-13 20:44:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:43,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439712486] [2021-07-13 20:44:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:43,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:43,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439712486] [2021-07-13 20:44:43,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439712486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:43,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412357314] [2021-07-13 20:44:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:44:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:43,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412357314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:43,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:43,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:44:43,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036309307] [2021-07-13 20:44:43,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:43,221 INFO L87 Difference]: Start difference. First operand 13878 states and 53207 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:44:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:43,999 INFO L93 Difference]: Finished difference Result 22502 states and 80640 transitions. [2021-07-13 20:44:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:44:44,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:44:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:44,057 INFO L225 Difference]: With dead ends: 22502 [2021-07-13 20:44:44,057 INFO L226 Difference]: Without dead ends: 22502 [2021-07-13 20:44:44,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:44:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22502 states. [2021-07-13 20:44:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22502 to 14104. [2021-07-13 20:44:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14104 states, 14103 states have (on average 3.8464156562433525) internal successors, (54246), 14103 states have internal predecessors, (54246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14104 states to 14104 states and 54246 transitions. [2021-07-13 20:44:44,485 INFO L78 Accepts]: Start accepts. Automaton has 14104 states and 54246 transitions. Word has length 28 [2021-07-13 20:44:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:44,485 INFO L482 AbstractCegarLoop]: Abstraction has 14104 states and 54246 transitions. [2021-07-13 20:44:44,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:44:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 14104 states and 54246 transitions. [2021-07-13 20:44:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:44,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:44,510 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:44,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:44,711 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 76 times [2021-07-13 20:44:44,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:44,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616052725] [2021-07-13 20:44:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:44,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:44,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616052725] [2021-07-13 20:44:44,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616052725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:44,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835451382] [2021-07-13 20:44:44,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:44:44,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:44,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:44,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:44,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835451382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:44,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:44,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:44,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39501446] [2021-07-13 20:44:44,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:44,859 INFO L87 Difference]: Start difference. First operand 14104 states and 54246 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:46,277 INFO L93 Difference]: Finished difference Result 39134 states and 140671 transitions. [2021-07-13 20:44:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:44:46,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:46,396 INFO L225 Difference]: With dead ends: 39134 [2021-07-13 20:44:46,396 INFO L226 Difference]: Without dead ends: 39134 [2021-07-13 20:44:46,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 811.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:44:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39134 states. [2021-07-13 20:44:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39134 to 15340. [2021-07-13 20:44:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 3.892887411174131) internal successors, (59713), 15339 states have internal predecessors, (59713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 59713 transitions. [2021-07-13 20:44:47,125 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 59713 transitions. Word has length 28 [2021-07-13 20:44:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:47,125 INFO L482 AbstractCegarLoop]: Abstraction has 15340 states and 59713 transitions. [2021-07-13 20:44:47,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 59713 transitions. [2021-07-13 20:44:47,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:47,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:47,152 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:47,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4130,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:47,352 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 77 times [2021-07-13 20:44:47,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:47,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853800834] [2021-07-13 20:44:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:47,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:47,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853800834] [2021-07-13 20:44:47,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853800834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:47,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587403904] [2021-07-13 20:44:47,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:44:47,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:44:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:47,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587403904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:47,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:47,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:47,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662472119] [2021-07-13 20:44:47,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:47,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:47,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:47,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:47,508 INFO L87 Difference]: Start difference. First operand 15340 states and 59713 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:48,936 INFO L93 Difference]: Finished difference Result 38160 states and 138109 transitions. [2021-07-13 20:44:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:44:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:49,055 INFO L225 Difference]: With dead ends: 38160 [2021-07-13 20:44:49,055 INFO L226 Difference]: Without dead ends: 38160 [2021-07-13 20:44:49,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:44:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38160 states. [2021-07-13 20:44:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38160 to 15314. [2021-07-13 20:44:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15314 states, 15313 states have (on average 3.88930973682492) internal successors, (59557), 15313 states have internal predecessors, (59557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15314 states to 15314 states and 59557 transitions. [2021-07-13 20:44:49,760 INFO L78 Accepts]: Start accepts. Automaton has 15314 states and 59557 transitions. Word has length 28 [2021-07-13 20:44:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:49,760 INFO L482 AbstractCegarLoop]: Abstraction has 15314 states and 59557 transitions. [2021-07-13 20:44:49,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 15314 states and 59557 transitions. [2021-07-13 20:44:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:49,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:49,787 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:49,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-07-13 20:44:49,987 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:49,987 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-13 20:44:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:49,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463589493] [2021-07-13 20:44:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:50,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:50,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463589493] [2021-07-13 20:44:50,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463589493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:50,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905651847] [2021-07-13 20:44:50,022 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 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 [2021-07-13 20:44:50,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:50,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:50,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:50,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905651847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:50,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:50,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:50,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487100108] [2021-07-13 20:44:50,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:50,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:50,093 INFO L87 Difference]: Start difference. First operand 15314 states and 59557 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:50,353 INFO L93 Difference]: Finished difference Result 23675 states and 90680 transitions. [2021-07-13 20:44:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:44:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:50,424 INFO L225 Difference]: With dead ends: 23675 [2021-07-13 20:44:50,424 INFO L226 Difference]: Without dead ends: 23628 [2021-07-13 20:44:50,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-07-13 20:44:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 20433. [2021-07-13 20:44:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20433 states, 20432 states have (on average 3.903680501174628) internal successors, (79760), 20432 states have internal predecessors, (79760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 79760 transitions. [2021-07-13 20:44:50,903 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 79760 transitions. Word has length 28 [2021-07-13 20:44:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:50,903 INFO L482 AbstractCegarLoop]: Abstraction has 20433 states and 79760 transitions. [2021-07-13 20:44:50,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 79760 transitions. [2021-07-13 20:44:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:50,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:50,939 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:51,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-07-13 20:44:51,139 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-13 20:44:51,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:51,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098380781] [2021-07-13 20:44:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:51,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:51,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098380781] [2021-07-13 20:44:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098380781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:51,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348764389] [2021-07-13 20:44:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:44:51,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:51,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:51,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348764389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:51,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:51,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:44:51,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649186247] [2021-07-13 20:44:51,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:44:51,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:44:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:44:51,241 INFO L87 Difference]: Start difference. First operand 20433 states and 79760 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:51,493 INFO L93 Difference]: Finished difference Result 23187 states and 88130 transitions. [2021-07-13 20:44:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:44:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:51,557 INFO L225 Difference]: With dead ends: 23187 [2021-07-13 20:44:51,558 INFO L226 Difference]: Without dead ends: 23187 [2021-07-13 20:44:51,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2021-07-13 20:44:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 19936. [2021-07-13 20:44:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19936 states, 19935 states have (on average 3.89204915976925) internal successors, (77588), 19935 states have internal predecessors, (77588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19936 states to 19936 states and 77588 transitions. [2021-07-13 20:44:52,097 INFO L78 Accepts]: Start accepts. Automaton has 19936 states and 77588 transitions. Word has length 28 [2021-07-13 20:44:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:52,097 INFO L482 AbstractCegarLoop]: Abstraction has 19936 states and 77588 transitions. [2021-07-13 20:44:52,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19936 states and 77588 transitions. [2021-07-13 20:44:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:52,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:52,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:52,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-07-13 20:44:52,333 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-13 20:44:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:52,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709342884] [2021-07-13 20:44:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:52,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709342884] [2021-07-13 20:44:52,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709342884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888473923] [2021-07-13 20:44:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:44:52,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:52,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888473923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:52,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:52,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:44:52,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947747251] [2021-07-13 20:44:52,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:52,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:52,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:52,473 INFO L87 Difference]: Start difference. First operand 19936 states and 77588 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:53,387 INFO L93 Difference]: Finished difference Result 31776 states and 117695 transitions. [2021-07-13 20:44:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:44:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:53,481 INFO L225 Difference]: With dead ends: 31776 [2021-07-13 20:44:53,481 INFO L226 Difference]: Without dead ends: 31776 [2021-07-13 20:44:53,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 449.1ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:44:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31776 states. [2021-07-13 20:44:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31776 to 20002. [2021-07-13 20:44:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 3.8901054947252636) internal successors, (77806), 20001 states have internal predecessors, (77806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 77806 transitions. [2021-07-13 20:44:54,185 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 77806 transitions. Word has length 28 [2021-07-13 20:44:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 20002 states and 77806 transitions. [2021-07-13 20:44:54,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 77806 transitions. [2021-07-13 20:44:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:54,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:54,225 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:54,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-13 20:44:54,425 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-13 20:44:54,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:54,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7381054] [2021-07-13 20:44:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:54,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:54,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7381054] [2021-07-13 20:44:54,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7381054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102952323] [2021-07-13 20:44:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:44:54,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:54,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102952323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:54,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:44:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451371906] [2021-07-13 20:44:54,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:54,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:54,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:54,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:54,579 INFO L87 Difference]: Start difference. First operand 20002 states and 77806 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:55,967 INFO L93 Difference]: Finished difference Result 40610 states and 148783 transitions. [2021-07-13 20:44:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:44:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:56,093 INFO L225 Difference]: With dead ends: 40610 [2021-07-13 20:44:56,093 INFO L226 Difference]: Without dead ends: 40610 [2021-07-13 20:44:56,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:44:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-07-13 20:44:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 20007. [2021-07-13 20:44:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20007 states, 20006 states have (on average 3.892182345296411) internal successors, (77867), 20006 states have internal predecessors, (77867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20007 states to 20007 states and 77867 transitions. [2021-07-13 20:44:56,955 INFO L78 Accepts]: Start accepts. Automaton has 20007 states and 77867 transitions. Word has length 28 [2021-07-13 20:44:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:56,955 INFO L482 AbstractCegarLoop]: Abstraction has 20007 states and 77867 transitions. [2021-07-13 20:44:56,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 20007 states and 77867 transitions. [2021-07-13 20:44:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:56,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:56,990 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:57,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:57,191 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-13 20:44:57,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:57,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83679676] [2021-07-13 20:44:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:57,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:57,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83679676] [2021-07-13 20:44:57,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83679676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:57,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689488338] [2021-07-13 20:44:57,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:44:57,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:57,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:57,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:57,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:57,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689488338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:57,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:57,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:44:57,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009804419] [2021-07-13 20:44:57,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:57,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:57,333 INFO L87 Difference]: Start difference. First operand 20007 states and 77867 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:58,679 INFO L93 Difference]: Finished difference Result 40173 states and 147928 transitions. [2021-07-13 20:44:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:44:58,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:58,809 INFO L225 Difference]: With dead ends: 40173 [2021-07-13 20:44:58,809 INFO L226 Difference]: Without dead ends: 40173 [2021-07-13 20:44:58,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:44:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40173 states. [2021-07-13 20:44:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40173 to 19795. [2021-07-13 20:44:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19795 states, 19794 states have (on average 3.884308376275639) internal successors, (76886), 19794 states have internal predecessors, (76886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19795 states to 19795 states and 76886 transitions. [2021-07-13 20:44:59,605 INFO L78 Accepts]: Start accepts. Automaton has 19795 states and 76886 transitions. Word has length 28 [2021-07-13 20:44:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:59,606 INFO L482 AbstractCegarLoop]: Abstraction has 19795 states and 76886 transitions. [2021-07-13 20:44:59,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 19795 states and 76886 transitions. [2021-07-13 20:44:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:59,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:59,641 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:59,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:59,841 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:59,841 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-13 20:44:59,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:59,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136069891] [2021-07-13 20:44:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:59,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:59,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136069891] [2021-07-13 20:44:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136069891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:59,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105813720] [2021-07-13 20:44:59,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:44:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:59,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:44:59,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:44:59,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105813720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:59,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:59,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:44:59,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802550619] [2021-07-13 20:44:59,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:44:59,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:59,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:44:59,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:44:59,941 INFO L87 Difference]: Start difference. First operand 19795 states and 76886 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:45:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:00,335 INFO L93 Difference]: Finished difference Result 29286 states and 109348 transitions. [2021-07-13 20:45:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:45:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-07-13 20:45:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:00,506 INFO L225 Difference]: With dead ends: 29286 [2021-07-13 20:45:00,507 INFO L226 Difference]: Without dead ends: 29269 [2021-07-13 20:45:00,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:45:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29269 states. [2021-07-13 20:45:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29269 to 20063. [2021-07-13 20:45:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20063 states, 20062 states have (on average 3.8898414913767323) internal successors, (78038), 20062 states have internal predecessors, (78038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20063 states to 20063 states and 78038 transitions. [2021-07-13 20:45:01,131 INFO L78 Accepts]: Start accepts. Automaton has 20063 states and 78038 transitions. Word has length 28 [2021-07-13 20:45:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:01,131 INFO L482 AbstractCegarLoop]: Abstraction has 20063 states and 78038 transitions. [2021-07-13 20:45:01,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:45:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 20063 states and 78038 transitions. [2021-07-13 20:45:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:01,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:01,168 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:01,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:01,368 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-13 20:45:01,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:01,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709786455] [2021-07-13 20:45:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:01,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709786455] [2021-07-13 20:45:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709786455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784291996] [2021-07-13 20:45:01,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:45:01,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:01,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:45:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:01,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784291996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:01,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:01,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:45:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690780791] [2021-07-13 20:45:01,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:01,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:01,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:01,496 INFO L87 Difference]: Start difference. First operand 20063 states and 78038 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:45:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:01,881 INFO L93 Difference]: Finished difference Result 31067 states and 114897 transitions. [2021-07-13 20:45:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:45:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-07-13 20:45:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:01,996 INFO L225 Difference]: With dead ends: 31067 [2021-07-13 20:45:01,996 INFO L226 Difference]: Without dead ends: 31067 [2021-07-13 20:45:01,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31067 states. [2021-07-13 20:45:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31067 to 19732. [2021-07-13 20:45:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19732 states, 19731 states have (on average 3.874714915615022) internal successors, (76452), 19731 states have internal predecessors, (76452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19732 states to 19732 states and 76452 transitions. [2021-07-13 20:45:02,626 INFO L78 Accepts]: Start accepts. Automaton has 19732 states and 76452 transitions. Word has length 28 [2021-07-13 20:45:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:02,626 INFO L482 AbstractCegarLoop]: Abstraction has 19732 states and 76452 transitions. [2021-07-13 20:45:02,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:45:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19732 states and 76452 transitions. [2021-07-13 20:45:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:02,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:02,662 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:02,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4138,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:02,863 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-13 20:45:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:02,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999932039] [2021-07-13 20:45:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:02,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999932039] [2021-07-13 20:45:02,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999932039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373887615] [2021-07-13 20:45:02,913 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 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 [2021-07-13 20:45:02,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:02,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:03,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373887615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:03,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:03,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:45:03,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458253149] [2021-07-13 20:45:03,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:03,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:03,008 INFO L87 Difference]: Start difference. First operand 19732 states and 76452 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:04,011 INFO L93 Difference]: Finished difference Result 29306 states and 108910 transitions. [2021-07-13 20:45:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:45:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:04,114 INFO L225 Difference]: With dead ends: 29306 [2021-07-13 20:45:04,114 INFO L226 Difference]: Without dead ends: 29306 [2021-07-13 20:45:04,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:45:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29306 states. [2021-07-13 20:45:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29306 to 19780. [2021-07-13 20:45:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 3.8734010819556093) internal successors, (76612), 19779 states have internal predecessors, (76612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 76612 transitions. [2021-07-13 20:45:04,796 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 76612 transitions. Word has length 28 [2021-07-13 20:45:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:04,797 INFO L482 AbstractCegarLoop]: Abstraction has 19780 states and 76612 transitions. [2021-07-13 20:45:04,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 76612 transitions. [2021-07-13 20:45:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:04,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:04,832 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:05,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:05,033 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-13 20:45:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:05,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401006628] [2021-07-13 20:45:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:05,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:05,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401006628] [2021-07-13 20:45:05,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401006628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:05,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364857820] [2021-07-13 20:45:05,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:45:05,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:05,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:05,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364857820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:05,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:05,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:45:05,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703607280] [2021-07-13 20:45:05,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:05,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:05,172 INFO L87 Difference]: Start difference. First operand 19780 states and 76612 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:06,231 INFO L93 Difference]: Finished difference Result 30838 states and 113300 transitions. [2021-07-13 20:45:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:45:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:06,337 INFO L225 Difference]: With dead ends: 30838 [2021-07-13 20:45:06,337 INFO L226 Difference]: Without dead ends: 30838 [2021-07-13 20:45:06,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:45:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30838 states. [2021-07-13 20:45:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30838 to 20326. [2021-07-13 20:45:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 3.8521525215252153) internal successors, (78295), 20325 states have internal predecessors, (78295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 78295 transitions. [2021-07-13 20:45:07,045 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 78295 transitions. Word has length 28 [2021-07-13 20:45:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:07,045 INFO L482 AbstractCegarLoop]: Abstraction has 20326 states and 78295 transitions. [2021-07-13 20:45:07,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 78295 transitions. [2021-07-13 20:45:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:07,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:07,084 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:07,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4140 [2021-07-13 20:45:07,297 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-13 20:45:07,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:07,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362743379] [2021-07-13 20:45:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:07,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:07,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362743379] [2021-07-13 20:45:07,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362743379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:07,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338504243] [2021-07-13 20:45:07,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:45:07,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:07,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:07,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338504243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:07,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:07,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:45:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595864010] [2021-07-13 20:45:07,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:07,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:07,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:07,433 INFO L87 Difference]: Start difference. First operand 20326 states and 78295 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:07,854 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 20:45:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:08,380 INFO L93 Difference]: Finished difference Result 29955 states and 110977 transitions. [2021-07-13 20:45:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:45:08,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:08,476 INFO L225 Difference]: With dead ends: 29955 [2021-07-13 20:45:08,476 INFO L226 Difference]: Without dead ends: 29951 [2021-07-13 20:45:08,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:45:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2021-07-13 20:45:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 20218. [2021-07-13 20:45:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20218 states, 20217 states have (on average 3.854825147153386) internal successors, (77933), 20217 states have internal predecessors, (77933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20218 states to 20218 states and 77933 transitions. [2021-07-13 20:45:09,114 INFO L78 Accepts]: Start accepts. Automaton has 20218 states and 77933 transitions. Word has length 28 [2021-07-13 20:45:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:09,114 INFO L482 AbstractCegarLoop]: Abstraction has 20218 states and 77933 transitions. [2021-07-13 20:45:09,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20218 states and 77933 transitions. [2021-07-13 20:45:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:09,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:09,153 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:09,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4141,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:09,353 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-13 20:45:09,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:09,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733431588] [2021-07-13 20:45:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:09,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:09,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733431588] [2021-07-13 20:45:09,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733431588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903649897] [2021-07-13 20:45:09,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:45:09,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:45:09,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:45:09,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:45:09,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903649897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:09,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:45:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944969483] [2021-07-13 20:45:09,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:45:09,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:09,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:45:09,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:45:09,456 INFO L87 Difference]: Start difference. First operand 20218 states and 77933 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:09,847 INFO L93 Difference]: Finished difference Result 25214 states and 93817 transitions. [2021-07-13 20:45:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:45:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:09,928 INFO L225 Difference]: With dead ends: 25214 [2021-07-13 20:45:09,928 INFO L226 Difference]: Without dead ends: 25214 [2021-07-13 20:45:09,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25214 states. [2021-07-13 20:45:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25214 to 20528. [2021-07-13 20:45:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20528 states, 20527 states have (on average 3.8459589808544843) internal successors, (78946), 20527 states have internal predecessors, (78946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20528 states to 20528 states and 78946 transitions. [2021-07-13 20:45:10,507 INFO L78 Accepts]: Start accepts. Automaton has 20528 states and 78946 transitions. Word has length 28 [2021-07-13 20:45:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:10,507 INFO L482 AbstractCegarLoop]: Abstraction has 20528 states and 78946 transitions. [2021-07-13 20:45:10,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 20528 states and 78946 transitions. [2021-07-13 20:45:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:10,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:10,545 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:10,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4142 [2021-07-13 20:45:10,746 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:10,746 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-13 20:45:10,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:10,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328609788] [2021-07-13 20:45:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:10,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:10,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328609788] [2021-07-13 20:45:10,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328609788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:10,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798245491] [2021-07-13 20:45:10,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:45:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:10,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:10,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798245491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:10,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:10,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:45:10,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016252782] [2021-07-13 20:45:10,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:10,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:10,873 INFO L87 Difference]: Start difference. First operand 20528 states and 78946 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:11,777 INFO L93 Difference]: Finished difference Result 30964 states and 113417 transitions. [2021-07-13 20:45:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:45:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:11,960 INFO L225 Difference]: With dead ends: 30964 [2021-07-13 20:45:11,960 INFO L226 Difference]: Without dead ends: 30964 [2021-07-13 20:45:11,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:45:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30964 states. [2021-07-13 20:45:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30964 to 22146. [2021-07-13 20:45:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22146 states, 22145 states have (on average 3.8581169564235718) internal successors, (85438), 22145 states have internal predecessors, (85438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22146 states to 22146 states and 85438 transitions. [2021-07-13 20:45:12,639 INFO L78 Accepts]: Start accepts. Automaton has 22146 states and 85438 transitions. Word has length 28 [2021-07-13 20:45:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:12,639 INFO L482 AbstractCegarLoop]: Abstraction has 22146 states and 85438 transitions. [2021-07-13 20:45:12,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22146 states and 85438 transitions. [2021-07-13 20:45:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:12,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:12,686 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:12,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4143,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:12,887 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-13 20:45:12,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:12,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503798654] [2021-07-13 20:45:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:12,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503798654] [2021-07-13 20:45:12,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503798654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707582679] [2021-07-13 20:45:12,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:45:13,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:13,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707582679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:13,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:13,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:45:13,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838243188] [2021-07-13 20:45:13,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:13,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:13,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:13,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:13,113 INFO L87 Difference]: Start difference. First operand 22146 states and 85438 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:13,937 INFO L93 Difference]: Finished difference Result 29203 states and 108883 transitions. [2021-07-13 20:45:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:45:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:14,033 INFO L225 Difference]: With dead ends: 29203 [2021-07-13 20:45:14,033 INFO L226 Difference]: Without dead ends: 29191 [2021-07-13 20:45:14,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:45:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2021-07-13 20:45:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 22298. [2021-07-13 20:45:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22298 states, 22297 states have (on average 3.8527156119657353) internal successors, (85904), 22297 states have internal predecessors, (85904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22298 states to 22298 states and 85904 transitions. [2021-07-13 20:45:14,657 INFO L78 Accepts]: Start accepts. Automaton has 22298 states and 85904 transitions. Word has length 28 [2021-07-13 20:45:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:14,657 INFO L482 AbstractCegarLoop]: Abstraction has 22298 states and 85904 transitions. [2021-07-13 20:45:14,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 22298 states and 85904 transitions. [2021-07-13 20:45:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:14,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:14,699 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:14,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-07-13 20:45:14,900 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-13 20:45:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:14,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849721822] [2021-07-13 20:45:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:15,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:15,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849721822] [2021-07-13 20:45:15,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849721822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:15,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895998248] [2021-07-13 20:45:15,060 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 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 [2021-07-13 20:45:15,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:45:15,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:15,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:45:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:15,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895998248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:15,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:15,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:45:15,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460181365] [2021-07-13 20:45:15,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:45:15,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:15,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:45:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:45:15,130 INFO L87 Difference]: Start difference. First operand 22298 states and 85904 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-13 20:45:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:15,380 INFO L93 Difference]: Finished difference Result 25557 states and 96861 transitions. [2021-07-13 20:45:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:45:15,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-07-13 20:45:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:15,451 INFO L225 Difference]: With dead ends: 25557 [2021-07-13 20:45:15,451 INFO L226 Difference]: Without dead ends: 25557 [2021-07-13 20:45:15,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25557 states. [2021-07-13 20:45:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25557 to 23101. [2021-07-13 20:45:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23101 states, 23100 states have (on average 3.847748917748918) internal successors, (88883), 23100 states have internal predecessors, (88883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23101 states to 23101 states and 88883 transitions. [2021-07-13 20:45:16,115 INFO L78 Accepts]: Start accepts. Automaton has 23101 states and 88883 transitions. Word has length 28 [2021-07-13 20:45:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:16,115 INFO L482 AbstractCegarLoop]: Abstraction has 23101 states and 88883 transitions. [2021-07-13 20:45:16,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-13 20:45:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 23101 states and 88883 transitions. [2021-07-13 20:45:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:16,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:16,163 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:16,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-07-13 20:45:16,364 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:16,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-13 20:45:16,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:16,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282447875] [2021-07-13 20:45:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:16,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:16,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282447875] [2021-07-13 20:45:16,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282447875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534766643] [2021-07-13 20:45:16,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:45:16,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:16,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:16,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534766643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:16,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:45:16,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609377067] [2021-07-13 20:45:16,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:16,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:16,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:16,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:16,497 INFO L87 Difference]: Start difference. First operand 23101 states and 88883 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:45:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:17,379 INFO L93 Difference]: Finished difference Result 30944 states and 114247 transitions. [2021-07-13 20:45:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:45:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:45:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:17,476 INFO L225 Difference]: With dead ends: 30944 [2021-07-13 20:45:17,476 INFO L226 Difference]: Without dead ends: 30944 [2021-07-13 20:45:17,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:45:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30944 states. [2021-07-13 20:45:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30944 to 24307. [2021-07-13 20:45:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24307 states, 24306 states have (on average 3.8156010861515677) internal successors, (92742), 24306 states have internal predecessors, (92742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24307 states to 24307 states and 92742 transitions. [2021-07-13 20:45:18,195 INFO L78 Accepts]: Start accepts. Automaton has 24307 states and 92742 transitions. Word has length 28 [2021-07-13 20:45:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:18,195 INFO L482 AbstractCegarLoop]: Abstraction has 24307 states and 92742 transitions. [2021-07-13 20:45:18,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:45:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 24307 states and 92742 transitions. [2021-07-13 20:45:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:18,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:18,239 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:18,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4146,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:18,439 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-13 20:45:18,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:18,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867015514] [2021-07-13 20:45:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:18,601 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 20:45:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:18,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867015514] [2021-07-13 20:45:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867015514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727463889] [2021-07-13 20:45:18,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:45:18,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:45:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:18,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:18,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727463889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:18,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:18,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:45:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038361250] [2021-07-13 20:45:18,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:18,702 INFO L87 Difference]: Start difference. First operand 24307 states and 92742 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:19,401 INFO L93 Difference]: Finished difference Result 30042 states and 111856 transitions. [2021-07-13 20:45:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:45:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:45:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:19,495 INFO L225 Difference]: With dead ends: 30042 [2021-07-13 20:45:19,495 INFO L226 Difference]: Without dead ends: 30034 [2021-07-13 20:45:19,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:45:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30034 states. [2021-07-13 20:45:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30034 to 24129. [2021-07-13 20:45:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24129 states, 24128 states have (on average 3.821742374005305) internal successors, (92211), 24128 states have internal predecessors, (92211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24129 states to 24129 states and 92211 transitions. [2021-07-13 20:45:20,183 INFO L78 Accepts]: Start accepts. Automaton has 24129 states and 92211 transitions. Word has length 28 [2021-07-13 20:45:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:20,183 INFO L482 AbstractCegarLoop]: Abstraction has 24129 states and 92211 transitions. [2021-07-13 20:45:20,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 24129 states and 92211 transitions. [2021-07-13 20:45:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:20,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:20,226 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:20,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:20,426 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:20,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-13 20:45:20,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:20,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302385595] [2021-07-13 20:45:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:20,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:20,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302385595] [2021-07-13 20:45:20,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302385595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:20,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267506145] [2021-07-13 20:45:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:45:20,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:20,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267506145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:20,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:20,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:45:20,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080283217] [2021-07-13 20:45:20,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:20,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:20,549 INFO L87 Difference]: Start difference. First operand 24129 states and 92211 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:21,215 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:45:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:21,403 INFO L93 Difference]: Finished difference Result 31875 states and 117476 transitions. [2021-07-13 20:45:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:45:21,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:45:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:21,499 INFO L225 Difference]: With dead ends: 31875 [2021-07-13 20:45:21,499 INFO L226 Difference]: Without dead ends: 31875 [2021-07-13 20:45:21,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:45:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-07-13 20:45:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 25163. [2021-07-13 20:45:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25163 states, 25162 states have (on average 3.797631348859391) internal successors, (95556), 25162 states have internal predecessors, (95556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 95556 transitions. [2021-07-13 20:45:22,348 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 95556 transitions. Word has length 28 [2021-07-13 20:45:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:22,348 INFO L482 AbstractCegarLoop]: Abstraction has 25163 states and 95556 transitions. [2021-07-13 20:45:22,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 95556 transitions. [2021-07-13 20:45:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:22,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:22,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:22,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:22,594 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-13 20:45:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:22,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729119346] [2021-07-13 20:45:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:22,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:22,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729119346] [2021-07-13 20:45:22,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729119346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:22,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296625357] [2021-07-13 20:45:22,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:45:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296625357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:22,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:22,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:45:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128878430] [2021-07-13 20:45:22,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:22,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:22,709 INFO L87 Difference]: Start difference. First operand 25163 states and 95556 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:23,261 INFO L93 Difference]: Finished difference Result 30826 states and 116166 transitions. [2021-07-13 20:45:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:45:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:23,366 INFO L225 Difference]: With dead ends: 30826 [2021-07-13 20:45:23,366 INFO L226 Difference]: Without dead ends: 30813 [2021-07-13 20:45:23,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:45:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30813 states. [2021-07-13 20:45:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30813 to 29259. [2021-07-13 20:45:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 3.81594777496753) internal successors, (111647), 29258 states have internal predecessors, (111647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 111647 transitions. [2021-07-13 20:45:24,312 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 111647 transitions. Word has length 28 [2021-07-13 20:45:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 111647 transitions. [2021-07-13 20:45:24,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 111647 transitions. [2021-07-13 20:45:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:24,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:24,372 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:24,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:24,572 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-13 20:45:24,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:24,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463262950] [2021-07-13 20:45:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:24,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463262950] [2021-07-13 20:45:24,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463262950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:24,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048784438] [2021-07-13 20:45:24,605 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 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 [2021-07-13 20:45:24,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048784438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:24,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:24,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:45:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120407485] [2021-07-13 20:45:24,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:24,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:24,678 INFO L87 Difference]: Start difference. First operand 29259 states and 111647 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:25,168 INFO L93 Difference]: Finished difference Result 32262 states and 120978 transitions. [2021-07-13 20:45:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:45:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:25,262 INFO L225 Difference]: With dead ends: 32262 [2021-07-13 20:45:25,262 INFO L226 Difference]: Without dead ends: 32262 [2021-07-13 20:45:25,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:45:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32262 states. [2021-07-13 20:45:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32262 to 29004. [2021-07-13 20:45:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29004 states, 29003 states have (on average 3.8122952797986414) internal successors, (110568), 29003 states have internal predecessors, (110568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29004 states to 29004 states and 110568 transitions. [2021-07-13 20:45:26,074 INFO L78 Accepts]: Start accepts. Automaton has 29004 states and 110568 transitions. Word has length 28 [2021-07-13 20:45:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:26,074 INFO L482 AbstractCegarLoop]: Abstraction has 29004 states and 110568 transitions. [2021-07-13 20:45:26,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 29004 states and 110568 transitions. [2021-07-13 20:45:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:26,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:26,140 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:26,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-07-13 20:45:26,345 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-13 20:45:26,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:26,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822835752] [2021-07-13 20:45:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:26,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822835752] [2021-07-13 20:45:26,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822835752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573751095] [2021-07-13 20:45:26,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:45:26,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:26,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:26,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573751095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:26,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:26,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:45:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736675787] [2021-07-13 20:45:26,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:26,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:26,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:26,473 INFO L87 Difference]: Start difference. First operand 29004 states and 110568 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:27,255 INFO L93 Difference]: Finished difference Result 35430 states and 131896 transitions. [2021-07-13 20:45:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:45:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:45:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:27,375 INFO L225 Difference]: With dead ends: 35430 [2021-07-13 20:45:27,375 INFO L226 Difference]: Without dead ends: 35422 [2021-07-13 20:45:27,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:45:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-07-13 20:45:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28970. [2021-07-13 20:45:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28970 states, 28969 states have (on average 3.8127308502191997) internal successors, (110451), 28969 states have internal predecessors, (110451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28970 states to 28970 states and 110451 transitions. [2021-07-13 20:45:28,280 INFO L78 Accepts]: Start accepts. Automaton has 28970 states and 110451 transitions. Word has length 28 [2021-07-13 20:45:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:28,280 INFO L482 AbstractCegarLoop]: Abstraction has 28970 states and 110451 transitions. [2021-07-13 20:45:28,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 28970 states and 110451 transitions. [2021-07-13 20:45:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:28,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:28,340 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:28,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:28,540 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-13 20:45:28,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:28,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533330154] [2021-07-13 20:45:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:28,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533330154] [2021-07-13 20:45:28,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533330154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:28,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108996093] [2021-07-13 20:45:28,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:45:28,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:28,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:28,731 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 20:45:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:28,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108996093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:28,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:28,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:45:28,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108549897] [2021-07-13 20:45:28,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:28,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:28,760 INFO L87 Difference]: Start difference. First operand 28970 states and 110451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:29,196 INFO L93 Difference]: Finished difference Result 31816 states and 119913 transitions. [2021-07-13 20:45:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:45:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:29,300 INFO L225 Difference]: With dead ends: 31816 [2021-07-13 20:45:29,300 INFO L226 Difference]: Without dead ends: 31816 [2021-07-13 20:45:29,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:45:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31816 states. [2021-07-13 20:45:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31816 to 29502. [2021-07-13 20:45:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29502 states, 29501 states have (on average 3.8112267380766753) internal successors, (112435), 29501 states have internal predecessors, (112435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29502 states to 29502 states and 112435 transitions. [2021-07-13 20:45:30,229 INFO L78 Accepts]: Start accepts. Automaton has 29502 states and 112435 transitions. Word has length 28 [2021-07-13 20:45:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:30,229 INFO L482 AbstractCegarLoop]: Abstraction has 29502 states and 112435 transitions. [2021-07-13 20:45:30,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29502 states and 112435 transitions. [2021-07-13 20:45:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:30,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:30,288 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:30,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4152 [2021-07-13 20:45:30,488 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-13 20:45:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:30,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096619893] [2021-07-13 20:45:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:30,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096619893] [2021-07-13 20:45:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096619893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831276635] [2021-07-13 20:45:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:45:30,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:45:30,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:30,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831276635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:30,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:45:30,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548993598] [2021-07-13 20:45:30,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:30,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:30,604 INFO L87 Difference]: Start difference. First operand 29502 states and 112435 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:31,327 INFO L93 Difference]: Finished difference Result 36375 states and 135365 transitions. [2021-07-13 20:45:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:45:31,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:45:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:31,442 INFO L225 Difference]: With dead ends: 36375 [2021-07-13 20:45:31,443 INFO L226 Difference]: Without dead ends: 36351 [2021-07-13 20:45:31,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:45:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2021-07-13 20:45:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 29684. [2021-07-13 20:45:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29684 states, 29683 states have (on average 3.806960212916484) internal successors, (113002), 29683 states have internal predecessors, (113002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29684 states to 29684 states and 113002 transitions. [2021-07-13 20:45:32,396 INFO L78 Accepts]: Start accepts. Automaton has 29684 states and 113002 transitions. Word has length 28 [2021-07-13 20:45:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:32,396 INFO L482 AbstractCegarLoop]: Abstraction has 29684 states and 113002 transitions. [2021-07-13 20:45:32,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:45:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29684 states and 113002 transitions. [2021-07-13 20:45:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:32,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:32,463 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:32,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:32,666 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:32,666 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-13 20:45:32,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:32,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290565443] [2021-07-13 20:45:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:32,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:32,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290565443] [2021-07-13 20:45:32,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290565443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:32,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919996670] [2021-07-13 20:45:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:45:32,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:45:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:32,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919996670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:32,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:32,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:45:32,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057314731] [2021-07-13 20:45:32,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:32,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:32,784 INFO L87 Difference]: Start difference. First operand 29684 states and 113002 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:33,365 INFO L93 Difference]: Finished difference Result 32240 states and 121414 transitions. [2021-07-13 20:45:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:45:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:33,478 INFO L225 Difference]: With dead ends: 32240 [2021-07-13 20:45:33,479 INFO L226 Difference]: Without dead ends: 32240 [2021-07-13 20:45:33,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:45:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-07-13 20:45:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 29610. [2021-07-13 20:45:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29610 states, 29609 states have (on average 3.8078287007328853) internal successors, (112746), 29609 states have internal predecessors, (112746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29610 states to 29610 states and 112746 transitions. [2021-07-13 20:45:34,419 INFO L78 Accepts]: Start accepts. Automaton has 29610 states and 112746 transitions. Word has length 28 [2021-07-13 20:45:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:34,419 INFO L482 AbstractCegarLoop]: Abstraction has 29610 states and 112746 transitions. [2021-07-13 20:45:34,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 29610 states and 112746 transitions. [2021-07-13 20:45:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:34,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:34,483 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:34,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4154 [2021-07-13 20:45:34,684 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:34,684 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-13 20:45:34,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:34,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877001057] [2021-07-13 20:45:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:34,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:34,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877001057] [2021-07-13 20:45:34,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877001057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:34,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170281895] [2021-07-13 20:45:34,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:45:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:34,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170281895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:34,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:34,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:45:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983019050] [2021-07-13 20:45:34,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:34,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:34,795 INFO L87 Difference]: Start difference. First operand 29610 states and 112746 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:45:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:35,578 INFO L93 Difference]: Finished difference Result 36298 states and 135106 transitions. [2021-07-13 20:45:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:45:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:45:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:35,702 INFO L225 Difference]: With dead ends: 36298 [2021-07-13 20:45:35,703 INFO L226 Difference]: Without dead ends: 36258 [2021-07-13 20:45:35,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:45:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36258 states. [2021-07-13 20:45:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36258 to 29776. [2021-07-13 20:45:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29776 states, 29775 states have (on average 3.803761544920235) internal successors, (113257), 29775 states have internal predecessors, (113257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29776 states to 29776 states and 113257 transitions. [2021-07-13 20:45:36,596 INFO L78 Accepts]: Start accepts. Automaton has 29776 states and 113257 transitions. Word has length 28 [2021-07-13 20:45:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:36,596 INFO L482 AbstractCegarLoop]: Abstraction has 29776 states and 113257 transitions. [2021-07-13 20:45:36,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:45:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 29776 states and 113257 transitions. [2021-07-13 20:45:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:36,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:36,656 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:36,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-07-13 20:45:36,856 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-13 20:45:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:36,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919951087] [2021-07-13 20:45:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:36,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:36,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919951087] [2021-07-13 20:45:36,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919951087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:36,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476754911] [2021-07-13 20:45:36,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:45:36,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:36,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476754911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:37,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:37,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:45:37,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54955137] [2021-07-13 20:45:37,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:37,159 INFO L87 Difference]: Start difference. First operand 29776 states and 113257 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:38,588 INFO L93 Difference]: Finished difference Result 68142 states and 250877 transitions. [2021-07-13 20:45:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:45:38,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:38,861 INFO L225 Difference]: With dead ends: 68142 [2021-07-13 20:45:38,861 INFO L226 Difference]: Without dead ends: 68142 [2021-07-13 20:45:38,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 742.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:45:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68142 states. [2021-07-13 20:45:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68142 to 37503. [2021-07-13 20:45:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37503 states, 37502 states have (on average 3.8855527705189057) internal successors, (145716), 37502 states have internal predecessors, (145716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37503 states to 37503 states and 145716 transitions. [2021-07-13 20:45:40,590 INFO L78 Accepts]: Start accepts. Automaton has 37503 states and 145716 transitions. Word has length 28 [2021-07-13 20:45:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:40,591 INFO L482 AbstractCegarLoop]: Abstraction has 37503 states and 145716 transitions. [2021-07-13 20:45:40,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 37503 states and 145716 transitions. [2021-07-13 20:45:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:40,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:40,670 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:40,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4156 [2021-07-13 20:45:40,870 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-13 20:45:40,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:40,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019397559] [2021-07-13 20:45:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:40,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:40,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019397559] [2021-07-13 20:45:40,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019397559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:40,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086564177] [2021-07-13 20:45:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:45:40,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:41,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086564177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:41,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:41,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:45:41,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752339631] [2021-07-13 20:45:41,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:41,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:41,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:41,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:41,016 INFO L87 Difference]: Start difference. First operand 37503 states and 145716 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:41,612 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:45:42,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:42,473 INFO L93 Difference]: Finished difference Result 67515 states and 249216 transitions. [2021-07-13 20:45:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:45:42,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:42,910 INFO L225 Difference]: With dead ends: 67515 [2021-07-13 20:45:42,910 INFO L226 Difference]: Without dead ends: 67515 [2021-07-13 20:45:42,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:45:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-07-13 20:45:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 37500. [2021-07-13 20:45:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37500 states, 37499 states have (on average 3.885490279740793) internal successors, (145702), 37499 states have internal predecessors, (145702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37500 states to 37500 states and 145702 transitions. [2021-07-13 20:45:44,557 INFO L78 Accepts]: Start accepts. Automaton has 37500 states and 145702 transitions. Word has length 28 [2021-07-13 20:45:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:44,557 INFO L482 AbstractCegarLoop]: Abstraction has 37500 states and 145702 transitions. [2021-07-13 20:45:44,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 37500 states and 145702 transitions. [2021-07-13 20:45:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:44,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:44,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:44,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:44,836 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-13 20:45:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:44,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790495502] [2021-07-13 20:45:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:44,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790495502] [2021-07-13 20:45:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790495502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213303809] [2021-07-13 20:45:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:45:44,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:44,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:44,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:44,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213303809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:44,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:45:44,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209551928] [2021-07-13 20:45:44,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:44,981 INFO L87 Difference]: Start difference. First operand 37500 states and 145702 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:46,524 INFO L93 Difference]: Finished difference Result 62937 states and 233716 transitions. [2021-07-13 20:45:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:45:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:46,765 INFO L225 Difference]: With dead ends: 62937 [2021-07-13 20:45:46,766 INFO L226 Difference]: Without dead ends: 62937 [2021-07-13 20:45:46,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:45:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62937 states. [2021-07-13 20:45:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62937 to 37524. [2021-07-13 20:45:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885830024251792) internal successors, (145808), 37523 states have internal predecessors, (145808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145808 transitions. [2021-07-13 20:45:48,477 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145808 transitions. Word has length 28 [2021-07-13 20:45:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:48,477 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145808 transitions. [2021-07-13 20:45:48,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145808 transitions. [2021-07-13 20:45:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:48,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:48,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:48,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4158,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:48,765 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-13 20:45:48,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:48,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206084524] [2021-07-13 20:45:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:48,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206084524] [2021-07-13 20:45:48,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206084524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:48,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320673192] [2021-07-13 20:45:48,800 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 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 [2021-07-13 20:45:48,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320673192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:48,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:48,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:45:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115520181] [2021-07-13 20:45:48,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:48,916 INFO L87 Difference]: Start difference. First operand 37524 states and 145808 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:50,130 INFO L93 Difference]: Finished difference Result 62070 states and 231476 transitions. [2021-07-13 20:45:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:45:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:50,374 INFO L225 Difference]: With dead ends: 62070 [2021-07-13 20:45:50,374 INFO L226 Difference]: Without dead ends: 62062 [2021-07-13 20:45:50,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:45:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62062 states. [2021-07-13 20:45:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62062 to 37524. [2021-07-13 20:45:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885670122324974) internal successors, (145802), 37523 states have internal predecessors, (145802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145802 transitions. [2021-07-13 20:45:52,184 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145802 transitions. Word has length 28 [2021-07-13 20:45:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:52,184 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145802 transitions. [2021-07-13 20:45:52,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145802 transitions. [2021-07-13 20:45:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:52,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:52,260 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:52,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4159,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:52,461 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-13 20:45:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:52,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977719378] [2021-07-13 20:45:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:52,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:52,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977719378] [2021-07-13 20:45:52,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977719378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113148852] [2021-07-13 20:45:52,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:45:52,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:52,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113148852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:52,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:45:52,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287705571] [2021-07-13 20:45:52,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:52,610 INFO L87 Difference]: Start difference. First operand 37524 states and 145802 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,387 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-13 20:45:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:53,871 INFO L93 Difference]: Finished difference Result 61748 states and 230607 transitions. [2021-07-13 20:45:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:45:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:54,107 INFO L225 Difference]: With dead ends: 61748 [2021-07-13 20:45:54,107 INFO L226 Difference]: Without dead ends: 61748 [2021-07-13 20:45:54,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 663.1ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:45:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61748 states. [2021-07-13 20:45:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61748 to 37532. [2021-07-13 20:45:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.8857477818336843) internal successors, (145836), 37531 states have internal predecessors, (145836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145836 transitions. [2021-07-13 20:45:55,679 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145836 transitions. Word has length 28 [2021-07-13 20:45:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:55,679 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145836 transitions. [2021-07-13 20:45:55,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145836 transitions. [2021-07-13 20:45:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:55,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:55,753 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:55,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4160 [2021-07-13 20:45:55,953 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-13 20:45:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:55,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453673581] [2021-07-13 20:45:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:56,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453673581] [2021-07-13 20:45:56,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453673581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064585932] [2021-07-13 20:45:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:45:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:56,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:56,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:56,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064585932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:56,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:56,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:45:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445364545] [2021-07-13 20:45:56,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:56,258 INFO L87 Difference]: Start difference. First operand 37532 states and 145836 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:57,454 INFO L93 Difference]: Finished difference Result 61537 states and 230081 transitions. [2021-07-13 20:45:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:45:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:57,678 INFO L225 Difference]: With dead ends: 61537 [2021-07-13 20:45:57,679 INFO L226 Difference]: Without dead ends: 61529 [2021-07-13 20:45:57,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:45:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61529 states. [2021-07-13 20:45:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61529 to 37532. [2021-07-13 20:45:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.885694492552823) internal successors, (145834), 37531 states have internal predecessors, (145834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145834 transitions. [2021-07-13 20:45:59,210 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145834 transitions. Word has length 28 [2021-07-13 20:45:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:59,210 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145834 transitions. [2021-07-13 20:45:59,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145834 transitions. [2021-07-13 20:45:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:59,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:59,439 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:59,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4161,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:59,653 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-13 20:45:59,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:59,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569863103] [2021-07-13 20:45:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:59,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:59,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569863103] [2021-07-13 20:45:59,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569863103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:59,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533815019] [2021-07-13 20:45:59,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 20:45:59,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533815019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:59,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:59,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:45:59,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551989665] [2021-07-13 20:45:59,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:59,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:59,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:59,790 INFO L87 Difference]: Start difference. First operand 37532 states and 145834 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:46:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:01,094 INFO L93 Difference]: Finished difference Result 60940 states and 226561 transitions. [2021-07-13 20:46:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:46:01,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:46:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:01,323 INFO L225 Difference]: With dead ends: 60940 [2021-07-13 20:46:01,323 INFO L226 Difference]: Without dead ends: 60940 [2021-07-13 20:46:01,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:46:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60940 states. [2021-07-13 20:46:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60940 to 40347. [2021-07-13 20:46:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40347 states, 40346 states have (on average 3.8897040598820207) internal successors, (156934), 40346 states have internal predecessors, (156934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40347 states to 40347 states and 156934 transitions. [2021-07-13 20:46:02,998 INFO L78 Accepts]: Start accepts. Automaton has 40347 states and 156934 transitions. Word has length 28 [2021-07-13 20:46:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:02,998 INFO L482 AbstractCegarLoop]: Abstraction has 40347 states and 156934 transitions. [2021-07-13 20:46:02,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:46:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 40347 states and 156934 transitions. [2021-07-13 20:46:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:03,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:03,077 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:03,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-07-13 20:46:03,277 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-13 20:46:03,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:03,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286771368] [2021-07-13 20:46:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:03,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286771368] [2021-07-13 20:46:03,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286771368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694278664] [2021-07-13 20:46:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 20:46:03,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:03,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:03,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694278664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:03,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:03,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:46:03,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591330590] [2021-07-13 20:46:03,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:03,401 INFO L87 Difference]: Start difference. First operand 40347 states and 156934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:46:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:04,648 INFO L93 Difference]: Finished difference Result 60463 states and 225303 transitions. [2021-07-13 20:46:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:46:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:46:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:04,873 INFO L225 Difference]: With dead ends: 60463 [2021-07-13 20:46:04,873 INFO L226 Difference]: Without dead ends: 60455 [2021-07-13 20:46:04,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:46:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60455 states. [2021-07-13 20:46:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60455 to 40063. [2021-07-13 20:46:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40063 states, 40062 states have (on average 3.8951125755079627) internal successors, (156046), 40062 states have internal predecessors, (156046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40063 states to 40063 states and 156046 transitions. [2021-07-13 20:46:06,499 INFO L78 Accepts]: Start accepts. Automaton has 40063 states and 156046 transitions. Word has length 28 [2021-07-13 20:46:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:06,499 INFO L482 AbstractCegarLoop]: Abstraction has 40063 states and 156046 transitions. [2021-07-13 20:46:06,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:46:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 40063 states and 156046 transitions. [2021-07-13 20:46:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:06,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:06,576 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:06,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4163,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:06,777 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-13 20:46:06,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:06,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128122138] [2021-07-13 20:46:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:06,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128122138] [2021-07-13 20:46:06,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128122138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143158341] [2021-07-13 20:46:06,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 20:46:06,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:06,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143158341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:06,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:06,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:46:06,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625341631] [2021-07-13 20:46:06,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:06,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:06,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:06,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:06,901 INFO L87 Difference]: Start difference. First operand 40063 states and 156046 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:46:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:07,912 INFO L93 Difference]: Finished difference Result 59012 states and 221313 transitions. [2021-07-13 20:46:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:46:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:46:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:08,134 INFO L225 Difference]: With dead ends: 59012 [2021-07-13 20:46:08,134 INFO L226 Difference]: Without dead ends: 58988 [2021-07-13 20:46:08,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:46:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58988 states. [2021-07-13 20:46:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58988 to 39973. [2021-07-13 20:46:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39973 states, 39972 states have (on average 3.8949514660262183) internal successors, (155689), 39972 states have internal predecessors, (155689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39973 states to 39973 states and 155689 transitions. [2021-07-13 20:46:09,801 INFO L78 Accepts]: Start accepts. Automaton has 39973 states and 155689 transitions. Word has length 28 [2021-07-13 20:46:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:09,801 INFO L482 AbstractCegarLoop]: Abstraction has 39973 states and 155689 transitions. [2021-07-13 20:46:09,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-13 20:46:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 39973 states and 155689 transitions. [2021-07-13 20:46:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:09,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:09,871 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:10,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-07-13 20:46:10,072 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-13 20:46:10,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:10,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839702771] [2021-07-13 20:46:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:10,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:10,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839702771] [2021-07-13 20:46:10,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839702771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:10,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901605732] [2021-07-13 20:46:10,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 20:46:10,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:10,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901605732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:10,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:10,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:10,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035031193] [2021-07-13 20:46:10,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:10,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:10,220 INFO L87 Difference]: Start difference. First operand 39973 states and 155689 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:11,480 INFO L93 Difference]: Finished difference Result 60251 states and 224712 transitions. [2021-07-13 20:46:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:46:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:11,695 INFO L225 Difference]: With dead ends: 60251 [2021-07-13 20:46:11,695 INFO L226 Difference]: Without dead ends: 60251 [2021-07-13 20:46:11,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:46:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60251 states. [2021-07-13 20:46:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60251 to 40069. [2021-07-13 20:46:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40069 states, 40068 states have (on average 3.8934561245882002) internal successors, (156003), 40068 states have internal predecessors, (156003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40069 states to 40069 states and 156003 transitions. [2021-07-13 20:46:13,324 INFO L78 Accepts]: Start accepts. Automaton has 40069 states and 156003 transitions. Word has length 28 [2021-07-13 20:46:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:13,324 INFO L482 AbstractCegarLoop]: Abstraction has 40069 states and 156003 transitions. [2021-07-13 20:46:13,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 40069 states and 156003 transitions. [2021-07-13 20:46:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:13,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:13,403 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:13,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4165 [2021-07-13 20:46:13,603 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-13 20:46:13,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:13,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046073581] [2021-07-13 20:46:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:13,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:13,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046073581] [2021-07-13 20:46:13,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046073581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:13,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298389533] [2021-07-13 20:46:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 20:46:13,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:13,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298389533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:13,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:13,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:13,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63497692] [2021-07-13 20:46:13,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:13,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:13,746 INFO L87 Difference]: Start difference. First operand 40069 states and 156003 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:14,866 INFO L93 Difference]: Finished difference Result 59938 states and 223824 transitions. [2021-07-13 20:46:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:46:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:15,085 INFO L225 Difference]: With dead ends: 59938 [2021-07-13 20:46:15,085 INFO L226 Difference]: Without dead ends: 59930 [2021-07-13 20:46:15,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:46:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59930 states. [2021-07-13 20:46:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59930 to 40001. [2021-07-13 20:46:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 3.894775) internal successors, (155791), 40000 states have internal predecessors, (155791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 155791 transitions. [2021-07-13 20:46:16,592 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 155791 transitions. Word has length 28 [2021-07-13 20:46:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:16,592 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 155791 transitions. [2021-07-13 20:46:16,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 155791 transitions. [2021-07-13 20:46:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:16,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:16,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:17,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4166 [2021-07-13 20:46:17,079 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-13 20:46:17,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:17,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862503344] [2021-07-13 20:46:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:17,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:17,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862503344] [2021-07-13 20:46:17,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862503344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:17,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314795232] [2021-07-13 20:46:17,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 20:46:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:17,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:17,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314795232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:17,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:17,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:46:17,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700761400] [2021-07-13 20:46:17,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:17,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:17,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:17,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:17,209 INFO L87 Difference]: Start difference. First operand 40001 states and 155791 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:18,184 INFO L93 Difference]: Finished difference Result 58669 states and 220313 transitions. [2021-07-13 20:46:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:46:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:18,394 INFO L225 Difference]: With dead ends: 58669 [2021-07-13 20:46:18,394 INFO L226 Difference]: Without dead ends: 58645 [2021-07-13 20:46:18,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:46:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58645 states. [2021-07-13 20:46:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58645 to 39977. [2021-07-13 20:46:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39977 states, 39976 states have (on average 3.894911947168301) internal successors, (155703), 39976 states have internal predecessors, (155703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39977 states to 39977 states and 155703 transitions. [2021-07-13 20:46:19,844 INFO L78 Accepts]: Start accepts. Automaton has 39977 states and 155703 transitions. Word has length 28 [2021-07-13 20:46:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:19,844 INFO L482 AbstractCegarLoop]: Abstraction has 39977 states and 155703 transitions. [2021-07-13 20:46:19,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 39977 states and 155703 transitions.